common.inc
<?php
// $Id: common.inc,v 1.1129 2010/03/18 19:15:02 dries Exp $
/**
* @file
* Common functions that many Drupal modules will need to reference.
*
* The functions that are critical and need to be available even when serving
* a cached page are instead located in bootstrap.inc.
*/
/**
* @defgroup php_wrappers PHP wrapper functions
* @{
* Functions that are wrappers or custom implementations of PHP functions.
*
* Certain PHP functions should not be used in Drupal. Instead, Drupal's
* replacement functions should be used.
*
* For example, for improved or more secure UTF8-handling, or RFC-compliant
* handling of URLs in Drupal.
*
* For ease of use and memorizing, all these wrapper functions use the same name
* as the original PHP function, but prefixed with "drupal_". Beware, however,
* that not all wrapper functions support the same arguments as the original
* functions.
*
* You should always use these wrapper functions in your code.
*
* Wrong:
* @code
* $my_substring = substr($original_string, 0, 5);
* @endcode
*
* Correct:
* @code
* $my_substring = drupal_substr($original_string, 0, 5);
* @endcode
*
* @} End of "defgroup php_wrappers".
*/
/**
* Return status for saving which involved creating a new item.
*/
define('SAVED_NEW', 1);
/**
* Return status for saving which involved an update to an existing item.
*/
define('SAVED_UPDATED', 2);
/**
* Return status for saving which deleted an existing item.
*/
define('SAVED_DELETED', 3);
/**
* The default weight of system CSS files added to the page.
*/
define('CSS_SYSTEM', -100);
/**
* The default weight of CSS files added to the page.
*/
define('CSS_DEFAULT', 0);
/**
* The default weight of theme CSS files added to the page.
*/
define('CSS_THEME', 100);
/**
* The weight of JavaScript libraries, settings or jQuery plugins being
* added to the page.
*/
define('JS_LIBRARY', -100);
/**
* The default weight of JavaScript being added to the page.
*/
define('JS_DEFAULT', 0);
/**
* The weight of theme JavaScript code being added to the page.
*/
define('JS_THEME', 100);
/**
* Error code indicating that the request made by drupal_http_request() exceeded
* the specified timeout.
*/
define('HTTP_REQUEST_TIMEOUT', 1);
/**
* Constants defining cache granularity for blocks and renderable arrays.
*
* Modules specify the caching patterns for their blocks using binary
* combinations of these constants in their hook_block_info():
* $block[delta]['cache'] = DRUPAL_CACHE_PER_ROLE | DRUPAL_CACHE_PER_PAGE;
* DRUPAL_CACHE_PER_ROLE is used as a default when no caching pattern is
* specified. Use DRUPAL_CACHE_CUSTOM to disable standard block cache and
* implement
*
* The block cache is cleared in cache_clear_all(), and uses the same clearing
* policy than page cache (node, comment, user, taxonomy added or updated...).
* Blocks requiring more fine-grained clearing might consider disabling the
* built-in block cache (DRUPAL_NO_CACHE) and roll their own.
*
* Note that user 1 is excluded from block caching.
*/
/**
* The block should not get cached. This setting should be used:
* - for simple blocks (notably those that do not perform any db query),
* where querying the db cache would be more expensive than directly generating
* the content.
* - for blocks that change too frequently.
*/
define('DRUPAL_NO_CACHE', -1);
/**
* The block is handling its own caching in its hook_block_view(). From the
* perspective of the block cache system, this is equivalent to DRUPAL_NO_CACHE.
* Useful when time based expiration is needed or a site uses a node access
* which invalidates standard block cache.
*/
define('DRUPAL_CACHE_CUSTOM', -2);
/**
* The block or element can change depending on the roles the user viewing the
* page belongs to. This is the default setting for blocks, used when the block
* does not specify anything.
*/
define('DRUPAL_CACHE_PER_ROLE', 0x0001);
/**
* The block or element can change depending on the user viewing the page.
* This setting can be resource-consuming for sites with large number of users,
* and thus should only be used when DRUPAL_CACHE_PER_ROLE is not sufficient.
*/
define('DRUPAL_CACHE_PER_USER', 0x0002);
/**
* The block or element can change depending on the page being viewed.
*/
define('DRUPAL_CACHE_PER_PAGE', 0x0004);
/**
* The block or element is the same for every user on every page where it is visible.
*/
define('DRUPAL_CACHE_GLOBAL', 0x0008);
/**
* Add content to a specified region.
*
* @param $region
* Page region the content is added to.
* @param $data
* Content to be added.
*/
function drupal_add_region_content($region = NULL, $data = NULL) {
static $content = array();
if (!is_null($region) && !is_null($data)) {
$content[$region][] = $data;
}
return $content;
}
/**
* Get assigned content for a given region.
*
* @param $region
* A specified region to fetch content for. If NULL, all regions will be
* returned.
* @param $delimiter
* Content to be inserted between imploded array elements.
*/
function drupal_get_region_content($region = NULL, $delimiter = ' ') {
$content = drupal_add_region_content();
if (isset($region)) {
if (isset($content[$region]) && is_array($content[$region])) {
return implode($delimiter, $content[$region]);
}
}
else {
foreach (array_keys($content) as $region) {
if (is_array($content[$region])) {
$content[$region] = implode($delimiter, $content[$region]);
}
}
return $content;
}
}
/**
* Get the name of the currently active install profile.
*
* When this function is called during Drupal's initial installation process,
* the name of the profile that's about to be installed is stored in the global
* installation state. At all other times, the standard Drupal systems variable
* table contains the name of the current profile, and we can call variable_get()
* to determine what one is active.
*
* @return $profile
* The name of the install profile.
*/
function drupal_get_profile() {
global $install_state;
if (isset($install_state['parameters']['profile'])) {
$profile = $install_state['parameters']['profile'];
}
else {
$profile = variable_get('install_profile', 'standard');
}
return $profile;
}
/**
* Set the breadcrumb trail for the current page.
*
* @param $breadcrumb
* Array of links, starting with "home" and proceeding up to but not including
* the current page.
*/
function drupal_set_breadcrumb($breadcrumb = NULL) {
$stored_breadcrumb = &drupal_static(__FUNCTION__);
if (!is_null($breadcrumb)) {
$stored_breadcrumb = $breadcrumb;
}
return $stored_breadcrumb;
}
/**
* Get the breadcrumb trail for the current page.
*/
function drupal_get_breadcrumb() {
$breadcrumb = drupal_set_breadcrumb();
if (is_null($breadcrumb)) {
$breadcrumb = menu_get_active_breadcrumb();
}
return $breadcrumb;
}
/**
* Return a string containing RDF namespace declarations for use in XML and
* XHTML output.
*/
function drupal_get_rdf_namespaces() {
// Serialize the RDF namespaces used in RDFa annotation.
$xml_rdf_namespaces = array();
foreach (module_invoke_all('rdf_namespaces') as $prefix => $uri) {
$xml_rdf_namespaces[] = 'xmlns:' . $prefix . '="' . $uri . '"';
}
return implode("\n ", $xml_rdf_namespaces);
}
/**
* Add output to the head tag of the HTML page.
*
* This function can be called as long the headers aren't sent. Pass no
* arguments (or NULL for both) to retrieve the currently stored elements.
*
* @param $data
* A renderable array. If the '#type' key is not set then 'html_tag' will be
* added as the default '#type'.
* @param $key
* A unique string key to allow implementations of hook_html_head_alter() to
* identify the element in $data. Required if $data is not NULL.
*
* @return
* An array of all stored HEAD elements.
*
* @see theme_html_tag()
*/
function drupal_add_html_head($data = NULL, $key = NULL) {
$stored_head = &drupal_static(__FUNCTION__);
if (!isset($stored_head)) {
// Make sure the defaults, including Content-Type, come first.
$stored_head = _drupal_default_html_head();
}
if (isset($data) && isset($key)) {
if (!isset($data['#type'])) {
$data['#type'] = 'html_tag';
}
$stored_head[$key] = $data;
}
return $stored_head;
}
/**
* Returns elements that are always displayed in the HEAD tag of the HTML page.
*/
function _drupal_default_html_head() {
// Add default elements. Make sure the Content-Type comes first because the
// IE browser may be vulnerable to XSS via encoding attacks from any content
// that comes before this META tag, such as a TITLE tag.
$elements['system_meta_content_type'] = array(
'#type' => 'html_tag',
'#tag' => 'meta',
'#attributes' => array(
'http-equiv' => 'Content-Type',
'content' => 'text/html; charset=utf-8',
),
// Security: This always has to be output first.
'#weight' => -1000,
);
// Show Drupal and the major version number in the META GENERATOR tag.
// Get the major version.
list($version, ) = explode('.', VERSION);
$elements['system_meta_generator'] = array(
'#type' => 'html_tag',
'#tag' => 'meta',
'#attributes' => array(
'name' => 'Generator',
'content' => 'Drupal ' . $version . ' (http://drupal.org)',
),
);
// Also send the generator in the HTTP header.
$elements['system_meta_generator']['#attached']['drupal_add_http_header'][] = array('X-Generator', $elements['system_meta_generator']['#attributes']['content']);
return $elements;
}
/**
* Retrieve output to be displayed in the HEAD tag of the HTML page.
*/
function drupal_get_html_head() {
$elements = drupal_add_html_head();
drupal_alter('html_head', $elements);
return drupal_render($elements);
}
/**
* Add a feed URL for the current page.
*
* This function can be called as long the HTML header hasn't been sent.
*
* @param $url
* A url for the feed.
* @param $title
* The title of the feed.
*/
function drupal_add_feed($url = NULL, $title = '') {
$stored_feed_links = &drupal_static(__FUNCTION__, array());
if (isset($url)) {
$stored_feed_links[$url] = theme('feed_icon', array('url' => $url, 'title' => $title));
drupal_add_html_head_link(array('rel' => 'alternate',
'type' => 'application/rss+xml',
'title' => $title,
'href' => $url));
}
return $stored_feed_links;
}
/**
* Get the feed URLs for the current page.
*
* @param $delimiter
* A delimiter to split feeds by.
*/
function drupal_get_feeds($delimiter = "\n") {
$feeds = drupal_add_feed();
return implode($feeds, $delimiter);
}
/**
* @name HTTP handling
* @{
* Functions to properly handle HTTP responses.
*/
/**
* Process a URL query parameter array to remove unwanted elements.
*
* @param $query
* (optional) An array to be processed. Defaults to $_GET.
* @param $exclude
* (optional) A list of $query array keys to remove. Use "parent[child]" to
* exclude nested items. Defaults to array('q').
* @param $parent
* Internal use only. Used to build the $query array key for nested items.
*
* @return
* An array containing query parameters, which can be used for url().
*/
function drupal_get_query_parameters(array $query = NULL, array $exclude = array('q'), $parent = '') {
// Set defaults, if none given.
if (!isset($query)) {
$query = $_GET;
}
// If $exclude is empty, there is nothing to filter.
if (empty($exclude)) {
return $query;
}
elseif (!$parent) {
$exclude = array_flip($exclude);
}
$params = array();
foreach ($query as $key => $value) {
$string_key = ($parent ? $parent . '[' . $key . ']' : $key);
if (isset($exclude[$string_key])) {
continue;
}
if (is_array($value)) {
$params[$key] = drupal_get_query_parameters($value, $exclude, $string_key);
}
else {
$params[$key] = $value;
}
}
return $params;
}
/**
* Split an URL-encoded query string into an array.
*
* @param $query
* The query string to split.
*
* @return
* An array of url decoded couples $param_name => $value.
*/
function drupal_get_query_array($query) {
$result = array();
if (!empty($query)) {
foreach (explode('&', $query) as $param) {
$param = explode('=', $param);
$result[$param[0]] = isset($param[1]) ? rawurldecode($param[1]) : '';
}
}
return $result;
}
/**
* Parse an array into a valid, rawurlencoded query string.
*
* This differs from http_build_query() as we need to rawurlencode() (instead of
* urlencode()) all query parameters.
*
* @param $query
* The query parameter array to be processed, e.g. $_GET.
* @param $parent
* Internal use only. Used to build the $query array key for nested items.
*
* @return
* A rawurlencoded string which can be used as or appended to the URL query
* string.
*
* @see drupal_get_query_parameters()
* @ingroup php_wrappers
*/
function drupal_http_build_query(array $query, $parent = '') {
$params = array();
foreach ($query as $key => $value) {
$key = ($parent ? $parent . '[' . rawurlencode($key) . ']' : rawurlencode($key));
// Recurse into children.
if (is_array($value)) {
$params[] = drupal_http_build_query($value, $key);
}
// If a query parameter value is NULL, only append its key.
elseif (!isset($value)) {
$params[] = $key;
}
else {
// For better readability of paths in query strings, we decode slashes.
$params[] = $key . '=' . str_replace('%2F', '/', rawurlencode($value));
}
}
return implode('&', $params);
}
/**
* Prepare a 'destination' URL query parameter for use in combination with drupal_goto().
*
* Used to direct the user back to the referring page after completing a form.
* By default the current URL is returned. If a destination exists in the
* previous request, that destination is returned. As such, a destination can
* persist across multiple pages.
*
* @see drupal_goto()
*/
function drupal_get_destination() {
$destination = &drupal_static(__FUNCTION__);
if (isset($destination)) {
return $destination;
}
if (isset($_GET['destination'])) {
$destination = array('destination' => $_GET['destination']);
}
else {
$path = $_GET['q'];
$query = drupal_http_build_query(drupal_get_query_parameters());
if ($query != '') {
$path .= '?' . $query;
}
$destination = array('destination' => $path);
}
return $destination;
}
/**
* Wrapper around parse_url() to parse a system URL string into an associative array, suitable for url().
*
* This function should only be used for URLs that have been generated by the
* system, resp. url(). It should not be used for URLs that come from external
* sources, or URLs that link to external resources.
*
* The returned array contains a 'path' that may be passed separately to url().
* For example:
* @code
* $options = drupal_parse_url($_GET['destination']);
* $my_url = url($options['path'], $options);
* $my_link = l('Example link', $options['path'], $options);
* @endcode
*
* This is required, because url() does not support relative URLs containing a
* query string or fragment in its $path argument. Instead, any query string
* needs to be parsed into an associative query parameter array in
* $options['query'] and the fragment into $options['fragment'].
*
* @param $url
* The URL string to parse, f.e. $_GET['destination'].
*
* @return
* An associative array containing the keys:
* - 'path': The path of the URL. If the given $url is external, this includes
* the scheme and host.
* - 'query': An array of query parameters of $url, if existent.
* - 'fragment': The fragment of $url, if existent.
*
* @see url()
* @see drupal_goto()
* @ingroup php_wrappers
*/
function drupal_parse_url($url) {
$options = array(
'path' => NULL,
'query' => array(),
'fragment' => '',
);
// External URLs: not using parse_url() here, so we do not have to rebuild
// the scheme, host, and path without having any use for it.
if (strpos($url, '://') !== FALSE) {
// Split off everything before the query string into 'path'.
$parts = explode('?', $url);
$options['path'] = $parts[0];
// If there is a query string, transform it into keyed query parameters.
if (isset($parts[1])) {
$query_parts = explode('#', $parts[1]);
parse_str($query_parts[0], $options['query']);
// Take over the fragment, if there is any.
if (isset($query_parts[1])) {
$options['fragment'] = $query_parts[1];
}
}
}
// Internal URLs.
else {
// parse_url() does not support relative URLs, so make it absolute. E.g. the
// relative URL "foo/bar:1" isn't properly parsed.
$parts = parse_url('http://example.com/' . $url);
// Strip the leading slash that was just added.
$options['path'] = substr($parts['path'], 1);
if (isset($parts['query'])) {
parse_str($parts['query'], $options['query']);
}
if (isset($parts['fragment'])) {
$options['fragment'] = $parts['fragment'];
}
}
// The 'q' parameter contains the path of the current page if clean URLs are
// disabled. It overrides the 'path' of the URL when present, even if clean
// URLs are enabled, due to how Apache rewriting rules work.
if (isset($options['query']['q'])) {
$options['path'] = $options['query']['q'];
unset($options['query']['q']);
}
return $options;
}
/**
* Encodes a Drupal path for use in a URL.
*
* For aesthetic reasons slashes are not escaped.
*
* Note that url() takes care of calling this function, so a path passed to that
* function should not be encoded in advance.
*
* @param $path
* The Drupal path to encode.
*/
function drupal_encode_path($path) {
return str_replace('%2F', '/', rawurlencode($path));
}
/**
* Send the user to a different Drupal page.
*
* This issues an on-site HTTP redirect. The function makes sure the redirected
* URL is formatted correctly.
*
* Usually the redirected URL is constructed from this function's input
* parameters. However you may override that behavior by setting a
* destination in either the $_REQUEST-array (i.e. by using
* the query string of an URI) This is used to direct the user back to
* the proper page after completing a form. For example, after editing
* a post on the 'admin/content'-page or after having logged on using the
* 'user login'-block in a sidebar. The function drupal_get_destination()
* can be used to help set the destination URL.
*
* Drupal will ensure that messages set by drupal_set_message() and other
* session data are written to the database before the user is redirected.
*
* This function ends the request; use it instead of a return in your menu
* callback.
*
* @param $path
* A Drupal path or a full URL.
* @param $options
* An associative array of additional URL options to pass to url().
* @param $http_response_code
* Valid values for an actual "goto" as per RFC 2616 section 10.3 are:
* - 301 Moved Permanently (the recommended value for most redirects)
* - 302 Found (default in Drupal and PHP, sometimes used for spamming search
* engines)
* - 303 See Other
* - 304 Not Modified
* - 305 Use Proxy
* - 307 Temporary Redirect (alternative to "503 Site Down for Maintenance")
* Note: Other values are defined by RFC 2616, but are rarely used and poorly
* supported.
*
* @see drupal_get_destination()
* @see url()
*/
function drupal_goto($path = '', array $options = array(), $http_response_code = 302) {
// A destination in $_GET always overrides the function arguments.
if (isset($_GET['destination'])) {
$destination = drupal_parse_url(urldecode($_GET['destination']));
$path = $destination['path'];
$options['query'] = $destination['query'];
$options['fragment'] = $destination['fragment'];
}
drupal_alter('drupal_goto', $path, $options, $http_response_code);
// The 'Location' HTTP header must be absolute.
$options['absolute'] = TRUE;
$url = url($path, $options);
header('Location: ' . $url, TRUE, $http_response_code);
// The "Location" header sends a redirect status code to the HTTP daemon. In
// some cases this can be wrong, so we make sure none of the code below the
// drupal_goto() call gets executed upon redirection.
drupal_exit($url);
}
/**
* Deliver a "site is under maintenance" message to the browser.
*
* Page callback functions wanting to report a "site offline" message should
* return MENU_SITE_OFFLINE instead of calling drupal_site_offline(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_site_offline().
*/
function drupal_site_offline() {
drupal_deliver_page(MENU_SITE_OFFLINE);
}
/**
* Deliver a "page not found" error to the browser.
*
* Page callback functions wanting to report a "page not found" message should
* return MENU_NOT_FOUND instead of calling drupal_not_found(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_not_found().
*/
function drupal_not_found() {
drupal_deliver_page(MENU_NOT_FOUND);
}
/**
* Deliver a "access denied" error to the browser.
*
* Page callback functions wanting to report an "access denied" message should
* return MENU_ACCESS_DENIED instead of calling drupal_access_denied(). However,
* functions that are invoked in contexts where that return value might not
* bubble up to menu_execute_active_handler() should call drupal_access_denied().
*/
function drupal_access_denied() {
drupal_deliver_page(MENU_ACCESS_DENIED);
}
/**
* Perform an HTTP request.
*
* This is a flexible and powerful HTTP client implementation. Correctly
* handles GET, POST, PUT or any other HTTP requests. Handles redirects.
*
* @param $url
* A string containing a fully qualified URI.
* @param $options
* (optional) An array which can have one or more of following keys:
* - headers
* An array containing request headers to send as name/value pairs.
* - method
* A string containing the request method. Defaults to 'GET'.
* - data
* A string containing the request body. Defaults to NULL.
* - max_redirects
* An integer representing how many times a redirect may be followed.
* Defaults to 3.
* - timeout
* A float representing the maximum number of seconds the function call
* may take. The default is 30 seconds. If a timeout occurs, the error
* code is set to the HTTP_REQUEST_TIMEOUT constant.
* @return
* An object which can have one or more of the following parameters:
* - request
* A string containing the request body that was sent.
* - code
* An integer containing the response status code, or the error code if
* an error occurred.
* - protocol
* The response protocol (e.g. HTTP/1.1 or HTTP/1.0).
* - status_message
* The status message from the response, if a response was received.
* - redirect_code
* If redirected, an integer containing the initial response status code.
* - redirect_url
* If redirected, a string containing the redirection location.
* - error
* If an error occurred, the error message. Otherwise not set.
* - headers
* An array containing the response headers as name/value pairs.
* - data
* A string containing the response body that was received.
*/
function drupal_http_request($url, array $options = array()) {
global $db_prefix;
$result = new stdClass();
// Parse the URL and make sure we can handle the schema.
$uri = @parse_url($url);
if ($uri == FALSE) {
$result->error = 'unable to parse URL';
$result->code = -1001;
return $result;
}
if (!isset($uri['scheme'])) {
$result->error = 'missing schema';
$result->code = -1002;
return $result;
}
timer_start(__FUNCTION__);
// Merge the default options.
$options += array(
'headers' => array(),
'method' => 'GET',
'data' => NULL,
'max_redirects' => 3,
'timeout' => 30,
);
switch ($uri['scheme']) {
case 'http':
$port = isset($uri['port']) ? $uri['port'] : 80;
$host = $uri['host'] . ($port != 80 ? ':' . $port : '');
$fp = @fsockopen($uri['host'], $port, $errno, $errstr, $options['timeout']);
break;
case 'https':
// Note: Only works when PHP is compiled with OpenSSL support.
$port = isset($uri['port']) ? $uri['port'] : 443;
$host = $uri['host'] . ($port != 443 ? ':' . $port : '');
$fp = @fsockopen('ssl://' . $uri['host'], $port, $errno, $errstr, $options['timeout']);
break;
default:
$result->error = 'invalid schema ' . $uri['scheme'];
$result->code = -1003;
return $result;
}
// Make sure the socket opened properly.
if (!$fp) {
// When a network error occurs, we use a negative number so it does not
// clash with the HTTP status codes.
$result->code = -$errno;
$result->error = trim($errstr);
// Mark that this request failed. This will trigger a check of the web
// server's ability to make outgoing HTTP requests the next time that
// requirements checking is performed.
// @see system_requirements()
variable_set('drupal_http_request_fails', TRUE);
return $result;
}
// Construct the path to act on.
$path = isset($uri['path']) ? $uri['path'] : '/';
if (isset($uri['query'])) {
$path .= '?' . $uri['query'];
}
// Merge the default headers.
$options['headers'] += array(
'User-Agent' => 'Drupal (+http://drupal.org/)',
);
// RFC 2616: "non-standard ports MUST, default ports MAY be included".
// We don't add the standard port to prevent from breaking rewrite rules
// checking the host that do not take into account the port number.
$options['headers']['Host'] = $host;
// Only add Content-Length if we actually have any content or if it is a POST
// or PUT request. Some non-standard servers get confused by Content-Length in
// at least HEAD/GET requests, and Squid always requires Content-Length in
// POST/PUT requests.
$content_length = strlen($options['data']);
if ($content_length > 0 || $options['method'] == 'POST' || $options['method'] == 'PUT') {
$options['headers']['Content-Length'] = $content_length;
}
// If the server URL has a user then attempt to use basic authentication.
if (isset($uri['user'])) {
$options['headers']['Authorization'] = 'Basic ' . base64_encode($uri['user'] . (!empty($uri['pass']) ? ":" . $uri['pass'] : ''));
}
// If the database prefix is being used by SimpleTest to run the tests in a copied
// database then set the user-agent header to the database prefix so that any
// calls to other Drupal pages will run the SimpleTest prefixed database. The
// user-agent is used to ensure that multiple testing sessions running at the
// same time won't interfere with each other as they would if the database
// prefix were stored statically in a file or database variable.
if (is_string($db_prefix) && preg_match("/simpletest\d+/", $db_prefix, $matches)) {
$options['headers']['User-Agent'] = drupal_generate_test_ua($matches[0]);
}
$request = $options['method'] . ' ' . $path . " HTTP/1.0\r\n";
foreach ($options['headers'] as $name => $value) {
$request .= $name . ': ' . trim($value) . "\r\n";
}
$request .= "\r\n" . $options['data'];
$result->request = $request;
fwrite($fp, $request);
// Fetch response.
$response = '';
while (!feof($fp)) {
// Calculate how much time is left of the original timeout value.
$timeout = $options['timeout'] - timer_read(__FUNCTION__) / 1000;
if ($timeout <= 0) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
return $result;
}
stream_set_timeout($fp, floor($timeout), floor(1000000 * fmod($timeout, 1)));
$response .= fread($fp, 1024);
}
fclose($fp);
// Parse response headers from the response body.
list($response, $result->data) = explode("\r\n\r\n", $response, 2);
$response = preg_split("/\r\n|\n|\r/", $response);
// Parse the response status line.
list($protocol, $code, $status_message) = explode(' ', trim(array_shift($response)), 3);
$result->protocol = $protocol;
$result->status_message = $status_message;
$result->headers = array();
// Parse the response headers.
while ($line = trim(array_shift($response))) {
list($header, $value) = explode(':', $line, 2);
if (isset($result->headers[$header]) && $header == 'Set-Cookie') {
// RFC 2109: the Set-Cookie response header comprises the token Set-
// Cookie:, followed by a comma-separated list of one or more cookies.
$result->headers[$header] .= ',' . trim($value);
}
else {
$result->headers[$header] = trim($value);
}
}
$responses = array(
100 => 'Continue',
101 => 'Switching Protocols',
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information',
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content',
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found',
303 => 'See Other',
304 => 'Not Modified',
305 => 'Use Proxy',
307 => 'Temporary Redirect',
400 => 'Bad Request',
401 => 'Unauthorized',
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required',
408 => 'Request Time-out',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed',
413 => 'Request Entity Too Large',
414 => 'Request-URI Too Large',
415 => 'Unsupported Media Type',
416 => 'Requested range not satisfiable',
417 => 'Expectation Failed',
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Time-out',
505 => 'HTTP Version not supported',
);
// RFC 2616 states that all unknown HTTP codes must be treated the same as the
// base code in their class.
if (!isset($responses[$code])) {
$code = floor($code / 100) * 100;
}
$result->code = $code;
switch ($code) {
case 200: // OK
case 304: // Not modified
break;
case 301: // Moved permanently
case 302: // Moved temporarily
case 307: // Moved temporarily
$location = $result->headers['Location'];
$options['timeout'] -= timer_read(__FUNCTION__) / 1000;
if ($options['timeout'] <= 0) {
$result->code = HTTP_REQUEST_TIMEOUT;
$result->error = 'request timed out';
}
elseif ($options['max_redirects']) {
// Redirect to the new location.
$options['max_redirects']--;
$result = drupal_http_request($location, $options);
$result->redirect_code = $code;
}
$result->redirect_url = $location;
break;
default:
$result->error = $status_message;
}
return $result;
}
/**
* @} End of "HTTP handling".
*/
function _fix_gpc_magic(&$item) {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic');
}
else {
$item = stripslashes($item);
}
}
/**
* Helper function to strip slashes from $_FILES skipping over the tmp_name keys
* since PHP generates single backslashes for file paths on Windows systems.
*
* tmp_name does not have backslashes added see
* http://php.net/manual/en/features.file-upload.php#42280
*/
function _fix_gpc_magic_files(&$item, $key) {
if ($key != 'tmp_name') {
if (is_array($item)) {
array_walk($item, '_fix_gpc_magic_files');
}
else {
$item = stripslashes($item);
}
}
}
/**
* Fix double-escaping problems caused by "magic quotes" in some PHP installations.
*/
function fix_gpc_magic() {
$fixed = &drupal_static(__FUNCTION__, FALSE);
if (!$fixed && ini_get('magic_quotes_gpc')) {
array_walk($_GET, '_fix_gpc_magic');
array_walk($_POST, '_fix_gpc_magic');
array_walk($_COOKIE, '_fix_gpc_magic');
array_walk($_REQUEST, '_fix_gpc_magic');
array_walk($_FILES, '_fix_gpc_magic_files');
$fixed = TRUE;
}
}
/**
* @defgroup validation Input validation
* @{
* Functions to validate user input.
*/
/**
* Verify the syntax of the given e-mail address.
*
* Empty e-mail addresses are allowed. See RFC 2822 for details.
*
* @param $mail
* A string containing an e-mail address.
* @return
* TRUE if the address is in a valid format.
*/
function valid_email_address($mail) {
return (bool)filter_var($mail, FILTER_VALIDATE_EMAIL);
}
/**
* Verify the syntax of the given URL.
*
* This function should only be used on actual URLs. It should not be used for
* Drupal menu paths, which can contain arbitrary characters.
* Valid values per RFC 3986.
* @param $url
* The URL to verify.
* @param $absolute
* Whether the URL is absolute (beginning with a scheme such as "http:").
* @return
* TRUE if the URL is in a valid format.
*/
function valid_url($url, $absolute = FALSE) {
if ($absolute) {
return (bool)preg_match("
/^ # Start at the beginning of the text
(?:ftp|https?):\/\/ # Look for ftp, http, or https schemes
(?: # Userinfo (optional) which is typically
(?:(?:[\w\.\-\+!$&'\(\)*\+,;=]|%[0-9a-f]{2})+:)* # a username or a username and password
(?:[\w\.\-\+%!$&'\(\)*\+,;=]|%[0-9a-f]{2})+@ # combination
)?
(?:
(?:[a-z0-9\-\.]|%[0-9a-f]{2})+ # A domain name or a IPv4 address
|(?:\[(?:[0-9a-f]{0,4}:)*(?:[0-9a-f]{0,4})\]) # or a well formed IPv6 address
)
(?::[0-9]+)? # Server port number (optional)
(?:[\/|\?]
(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2}) # The path and query (optional)
*)?
$/xi", $url);
}
else {
return (bool)preg_match("/^(?:[\w#!:\.\?\+=&@$'~*,;\/\(\)\[\]\-]|%[0-9a-f]{2})+$/i", $url);
}
}
/**
* @} End of "defgroup validation".
*/
/**
* Register an event for the current visitor to the flood control mechanism.
*
* @param $name
* The name of an event.
* @param $window
* Optional number of seconds before this event expires. Defaults to 3600 (1
* hour). Typically uses the same value as the flood_is_allowed() $window
* parameter. Expired events are purged on cron run to prevent the flood table
* from growing indefinitely.
* @param $identifier
* Optional identifier (defaults to the current user's IP address).
*/
function flood_register_event($name, $window = 3600, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
db_insert('flood')
->fields(array(
'event' => $name,
'identifier' => $identifier,
'timestamp' => REQUEST_TIME,
'expiration' => REQUEST_TIME + $window,
))
->execute();
}
/**
* Make the flood control mechanism forget about an event for the current visitor.
*
* @param $name
* The name of an event.
* @param $identifier
* Optional identifier (defaults to the current user's IP address).
*/
function flood_clear_event($name, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
db_delete('flood')
->condition('event', $name)
->condition('identifier', $identifier)
->execute();
}
/**
* Checks whether user is allowed to proceed with the specified event.
*
* Events can have thresholds saying that each user can only do that event
* a certain number of times in a time window. This function verifies that the
* current user has not exceeded this threshold.
*
* @param $name
* The unique name of the event.
* @param $threshold
* The maximum number of times each user can do this event per time window.
* @param $window
* Number of seconds in the time window for this event (default is 3600
* seconds, or 1 hour).
* @param $identifier
* Unique identifier of the current user. Defaults to their IP address.
*
* @return
* TRUE if the user is allowed to proceed. FALSE if they have exceeded the
* threshold and should not be allowed to proceed.
*/
function flood_is_allowed($name, $threshold, $window = 3600, $identifier = NULL) {
if (!isset($identifier)) {
$identifier = ip_address();
}
$number = db_query("SELECT COUNT(*) FROM {flood} WHERE event = :event AND identifier = :identifier AND timestamp > :timestamp", array(
':event' => $name,
':identifier' => $identifier,
':timestamp' => REQUEST_TIME - $window))
->fetchField();
return ($number < $threshold);
}
function check_file($filename) {
return is_uploaded_file($filename);
}
/**
* @defgroup sanitization Sanitization functions
* @{
* Functions to sanitize values.
*/
/**
* Prepare a URL for use in an HTML attribute. Strips harmful protocols.
*/
function check_url($uri) {
return filter_xss_bad_protocol($uri, FALSE);
}
/**
* Very permissive XSS/HTML filter for admin-only use.
*
* Use only for fields where it is impractical to use the
* whole filter system, but where some (mainly inline) mark-up
* is desired (so check_plain() is not acceptable).
*
* Allows all tags that can be used inside an HTML body, save
* for scripts and styles.
*/
function filter_xss_admin($string) {
return filter_xss($string, array('a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'div', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var'));
}
/**
* Filter XSS.
*
* Based on kses by Ulf Harnhammar, see
* http://sourceforge.net/projects/kses
*
* For examples of various XSS attacks, see:
* http://ha.ckers.org/xss.html
*
* This code does four things:
* - Removes characters and constructs that can trick browsers
* - Makes sure all HTML entities are well-formed
* - Makes sure all HTML tags and attributes are well-formed
* - Makes sure no HTML tags contain URLs with a disallowed protocol (e.g. javascript:)
*
* @param $string
* The string with raw HTML in it. It will be stripped of everything that can cause
* an XSS attack.
* @param $allowed_tags
* An array of allowed tags.
*/
function filter_xss($string, $allowed_tags = array('a', 'em', 'strong', 'cite', 'blockquote', 'code', 'ul', 'ol', 'li', 'dl', 'dt', 'dd')) {
// Only operate on valid UTF-8 strings. This is necessary to prevent cross
// site scripting issues on Internet Explorer 6.
if (!drupal_validate_utf8($string)) {
return '';
}
// Store the text format
_filter_xss_split($allowed_tags, TRUE);
// Remove NULL characters (ignored by some browsers)
$string = str_replace(chr(0), '', $string);
// Remove Netscape 4 JS entities
$string = preg_replace('%&\s*\{[^}]*(\}\s*;?|$)%', '', $string);
// Defuse all HTML entities
$string = str_replace('&', '&', $string);
// Change back only well-formed entities in our whitelist
// Decimal numeric entities
$string = preg_replace('/&#([0-9]+;)/', '&#\1', $string);
// Hexadecimal numeric entities
$string = preg_replace('/&#[Xx]0*((?:[0-9A-Fa-f]{2})+;)/', '&#x\1', $string);
// Named entities
$string = preg_replace('/&([A-Za-z][A-Za-z0-9]*;)/', '&\1', $string);
return preg_replace_callback('%
(
<(?=[^a-zA-Z!/]) # a lone <
| # or
<[^>]*(>|$) # a string that starts with a <, up until the > or the end of the string
| # or
> # just a >
)%x', '_filter_xss_split', $string);
}
/**
* Processes an HTML tag.
*
* @param $m
* An array with various meaning depending on the value of $store.
* If $store is TRUE then the array contains the allowed tags.
* If $store is FALSE then the array has one element, the HTML tag to process.
* @param $store
* Whether to store $m.
* @return
* If the element isn't allowed, an empty string. Otherwise, the cleaned up
* version of the HTML element.
*/
function _filter_xss_split($m, $store = FALSE) {
static $allowed_html;
if ($store) {
$allowed_html = array_flip($m);
return;
}
$string = $m[1];
if (substr($string, 0, 1) != '<') {
// We matched a lone ">" character
return '>';
}
elseif (strlen($string) == 1) {
// We matched a lone "<" character
return '<';
}
if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $string, $matches)) {
// Seriously malformed
return '';
}
$slash = trim($matches[1]);
$elem = &$matches[2];
$attrlist = &$matches[3];
if (!isset($allowed_html[strtolower($elem)])) {
// Disallowed HTML element
return '';
}
if ($slash != '') {
return "</$elem>";
}
// Is there a closing XHTML slash at the end of the attributes?
$attrlist = preg_replace('%(\s?)/\s*$%', '\1', $attrlist, -1, $count);
$xhtml_slash = $count ? ' /' : '';
// Clean up attributes
$attr2 = implode(' ', _filter_xss_attributes($attrlist));
$attr2 = preg_replace('/[<>]/', '', $attr2);
$attr2 = strlen($attr2) ? ' ' . $attr2 : '';
return "<$elem$attr2$xhtml_slash>";
}
/**
* Processes a string of HTML attributes.
*
* @return
* Cleaned up version of the HTML attributes.
*/
function _filter_xss_attributes($attr) {
$attrarr = array();
$mode = 0;
$attrname = '';
while (strlen($attr) != 0) {
// Was the last operation successful?
$working = 0;
switch ($mode) {
case 0:
// Attribute name, href for instance
if (preg_match('/^([-a-zA-Z]+)/', $attr, $match)) {
$attrname = strtolower($match[1]);
$skip = ($attrname == 'style' || substr($attrname, 0, 2) == 'on');
$working = $mode = 1;
$attr = preg_replace('/^[-a-zA-Z]+/', '', $attr);
}
break;
case 1:
// Equals sign or valueless ("selected")
if (preg_match('/^\s*=\s*/', $attr)) {
$working = 1; $mode = 2;
$attr = preg_replace('/^\s*=\s*/', '', $attr);
break;
}
if (preg_match('/^\s+/', $attr)) {
$working = 1; $mode = 0;
if (!$skip) {
$attrarr[] = $attrname;
}
$attr = preg_replace('/^\s+/', '', $attr);
}
break;
case 2:
// Attribute value, a URL after href= for instance
if (preg_match('/^"([^"]*)"(\s+|$)/', $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname=\"$thisval\"";
}
$working = 1;
$mode = 0;
$attr = preg_replace('/^"[^"]*"(\s+|$)/', '', $attr);
break;
}
if (preg_match("/^'([^']*)'(\s+|$)/", $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname='$thisval'";
}
$working = 1; $mode = 0;
$attr = preg_replace("/^'[^']*'(\s+|$)/", '', $attr);
break;
}
if (preg_match("%^([^\s\"']+)(\s+|$)%", $attr, $match)) {
$thisval = filter_xss_bad_protocol($match[1]);
if (!$skip) {
$attrarr[] = "$attrname=\"$thisval\"";
}
$working = 1; $mode = 0;
$attr = preg_replace("%^[^\s\"']+(\s+|$)%", '', $attr);
}
break;
}
if ($working == 0) {
// not well formed, remove and try again
$attr = preg_replace('/
^
(
"[^"]*("|$) # - a string that starts with a double quote, up until the next double quote or the end of the string
| # or
\'[^\']*(\'|$)| # - a string that starts with a quote, up until the next quote or the end of the string
| # or
\S # - a non-whitespace character
)* # any number of the above three
\s* # any number of whitespaces
/x', '', $attr);
$mode = 0;
}
}
// The attribute list ends with a valueless attribute like "selected".
if ($mode == 1) {
$attrarr[] = $attrname;
}
return $attrarr;
}
/**
* Processes an HTML attribute value and ensures it does not contain an URL with a disallowed protocol (e.g. javascript:).
*
* @param $string
* The string with the attribute value.
* @param $decode
* Whether to decode entities in the $string. Set to FALSE if the $string
* is in plain text, TRUE otherwise. Defaults to TRUE.
* @return
* Cleaned up and HTML-escaped version of $string.
*/
function filter_xss_bad_protocol($string, $decode = TRUE) {
static $allowed_protocols;
if (!isset($allowed_protocols)) {
$allowed_protocols = array_flip(variable_get('filter_allowed_protocols', array('ftp', 'http', 'https', 'irc', 'mailto', 'news', 'nntp', 'rtsp', 'sftp', 'ssh', 'telnet', 'webcal')));
}
// Get the plain text representation of the attribute value (i.e. its meaning).
if ($decode) {
$string = decode_entities($string);
}
// Iteratively remove any invalid protocol found.
do {
$before = $string;
$colonpos = strpos($string, ':');
if ($colonpos > 0) {
// We found a colon, possibly a protocol. Verify.
$protocol = substr($string, 0, $colonpos);
// If a colon is preceded by a slash, question mark or hash, it cannot
// possibly be part of the URL scheme. This must be a relative URL,
// which inherits the (safe) protocol of the base document.
if (preg_match('![/?#]!', $protocol)) {
break;
}
// Per RFC2616, section 3.2.3 (URI Comparison) scheme comparison must be case-insensitive
// Check if this is a disallowed protocol.
if (!isset($allowed_protocols[strtolower($protocol)])) {
$string = substr($string, $colonpos + 1);
}
}
} while ($before != $string);
return check_plain($string);
}
/**
* @} End of "defgroup sanitization".
*/
/**
* @defgroup format Formatting
* @{
* Functions to format numbers, strings, dates, etc.
*/
/**
* Formats an RSS channel.
*
* Arbitrary elements may be added using the $args associative array.
*/
function format_rss_channel($title, $link, $description, $items, $langcode = NULL, $args = array()) {
global $language;
$langcode = $langcode ? $langcode : $language->language;
$output = "<channel>\n";
$output .= ' <title>' . check_plain($title) . "</title>\n";
$output .= ' <link>' . check_url($link) . "</link>\n";
// The RSS 2.0 "spec" doesn't indicate HTML can be used in the description.
// We strip all HTML tags, but need to prevent double encoding from properly
// escaped source data (such as & becoming &amp;).
$output .= ' <description>' . check_plain(decode_entities(strip_tags($description))) . "</description>\n";
$output .= ' <language>' . check_plain($langcode) . "</language>\n";
$output .= format_xml_elements($args);
$output .= $items;
$output .= "</channel>\n";
return $output;
}
/**
* Format a single RSS item.
*
* Arbitrary elements may be added using the $args associative array.
*/
function format_rss_item($title, $link, $description, $args = array()) {
$output = "<item>\n";
$output .= ' <title>' . check_plain($title) . "</title>\n";
$output .= ' <link>' . check_url($link) . "</link>\n";
$output .= ' <description>' . check_plain($description) . "</description>\n";
$output .= format_xml_elements($args);
$output .= "</item>\n";
return $output;
}
/**
* Format XML elements.
*
* @param $array
* An array where each item represent an element and is either a:
* - (key => value) pair (<key>value</key>)
* - Associative array with fields:
* - 'key': element name
* - 'value': element contents
* - 'attributes': associative array of element attributes
*
* In both cases, 'value' can be a simple string, or it can be another array
* with the same format as $array itself for nesting.
*/
function format_xml_elements($array) {
$output = '';
foreach ($array as $key => $value) {
if (is_numeric($key)) {
if ($value['key']) {
$output .= ' <' . $value['key'];
if (isset($value['attributes']) && is_array($value['attributes'])) {
$output .= drupal_attributes($value['attributes']);
}
if (isset($value['value']) && $value['value'] != '') {
$output .= '>' . (is_array($value['value']) ? format_xml_elements($value['value']) : check_plain($value['value'])) . '</' . $value['key'] . ">\n";
}
else {
$output .= " />\n";
}
}
}
else {
$output .= ' <' . $key . '>' . (is_array($value) ? format_xml_elements($value) : check_plain($value)) . "</$key>\n";
}
}
return $output;
}
/**
* Format a string containing a count of items.
*
* This function ensures that the string is pluralized correctly. Since t() is
* called by this function, make sure not to pass already-localized strings to
* it.
*
* For example:
* @code
* $output = format_plural($node->comment_count, '1 comment', '@count comments');
* @endcode
*
* Example with additional replacements:
* @code
* $output = format_plural($update_count,
* 'Changed the content type of 1 post from %old-type to %new-type.',
* 'Changed the content type of @count posts from %old-type to %new-type.',
* array('%old-type' => $info->old_type, '%new-type' => $info->new_type)));
* @endcode
*
* @param $count
* The item count to display.
* @param $singular
* The string for the singular case. Please make sure it is clear this is
* singular, to ease translation (e.g. use "1 new comment" instead of "1 new").
* Do not use @count in the singular string.
* @param $plural
* The string for the plural case. Please make sure it is clear this is plural,
* to ease translation. Use @count in place of the item count, as in "@count
* new comments".
* @param $args
* An associative array of replacements to make after translation. Incidences
* of any key in this array are replaced with the corresponding value.
* Based on the first character of the key, the value is escaped and/or themed:
* - !variable: inserted as is
* - @variable: escape plain text to HTML (check_plain)
* - %variable: escape text and theme as a placeholder for user-submitted
* content (check_plain + theme_placeholder)
* Note that you do not need to include @count in this array.
* This replacement is done automatically for the plural case.
* @param $options
* An associative array of additional options, with the following keys:
* - 'langcode' (default to the current language) The language code to
* translate to a language other than what is used to display the page.
* - 'context' (default to the empty context) The context the source string
* belongs to.
* @return
* A translated string.
*/
function format_plural($count, $singular, $plural, array $args = array(), array $options = array()) {
$args['@count'] = $count;
if ($count == 1) {
return t($singular, $args, $options);
}
// Get the plural index through the gettext formula.
$index = (function_exists('locale_get_plural')) ? locale_get_plural($count, isset($options['langcode']) ? $options['langcode'] : NULL) : -1;
// Backwards compatibility.
if ($index < 0) {
return t($plural, $args, $options);
}
else {
switch ($index) {
case "0":
return t($singular, $args, $options);
case "1":
return t($plural, $args, $options);
default:
unset($args['@count']);
$args['@count[' . $index . ']'] = $count;
return t(strtr($plural, array('@count' => '@count[' . $index . ']')), $args, $options);
}
}
}
/**
* Parse a given byte count.
*
* @param $size
* A size expressed as a number of bytes with optional SI or IEC binary unit
* prefix (e.g. 2, 3K, 5MB, 10G, 6GiB, 8 bytes, 9mbytes).
* @return
* An integer representation of the size in bytes.
*/
function parse_size($size) {
$unit = preg_replace('/[^bkmgtpezy]/i', '', $size); // Remove the non-unit characters from the size.
$size = preg_replace('/[^0-9\.]/', '', $size); // Remove the non-numeric characters from the size.
if ($unit) {
// Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
return round($size * pow(DRUPAL_KILOBYTE, stripos('bkmgtpezy', $unit[0])));
}
else {
return round($size);
}
}
/**
* Generate a string representation for the given byte count.
*
* @param $size
* A size in bytes.
* @param $langcode
* Optional language code to translate to a language other than what is used
* to display the page.
* @return
* A translated string representation of the size.
*/
function format_size($size, $langcode = NULL) {
if ($size < DRUPAL_KILOBYTE) {
return format_plural($size, '1 byte', '@count bytes', array(), array('langcode' => $langcode));
}
else {
$size = $size / DRUPAL_KILOBYTE; // Convert bytes to kilobytes.
$units = array(
t('@size KB', array(), array('langcode' => $langcode)),
t('@size MB', array(), array('langcode' => $langcode)),
t('@size GB', array(), array('langcode' => $langcode)),
t('@size TB', array(), array('langcode' => $langcode)),
t('@size PB', array(), array('langcode' => $langcode)),
t('@size EB', array(), array('langcode' => $langcode)),
t('@size ZB', array(), array('langcode' => $langcode)),
t('@size YB', array(), array('langcode' => $langcode)),
);
foreach ($units as $unit) {
if (round($size, 2) >= DRUPAL_KILOBYTE) {
$size = $size / DRUPAL_KILOBYTE;
}
else {
break;
}
}
return str_replace('@size', round($size, 2), $unit);
}
}
/**
* Format a time interval with the requested granularity.
*
* @param $timestamp
* The length of the interval in seconds.
* @param $granularity
* How many different units to display in the string.
* @param $langcode
* Optional language code to translate to a language other than
* what is used to display the page.
* @return
* A translated string representation of the interval.
*/
function format_interval($timestamp, $granularity = 2, $langcode = NULL) {
$units = array(
'1 year|@count years' => 31536000,
'1 month|@count months' => 2592000,
'1 week|@count weeks' => 604800,
'1 day|@count days' => 86400,
'1 hour|@count hours' => 3600,
'1 min|@count min' => 60,
'1 sec|@count sec' => 1
);
$output = '';
foreach ($units as $key => $value) {
$key = explode('|', $key);
if ($timestamp >= $value) {
$output .= ($output ? ' ' : '') . format_plural(floor($timestamp / $value), $key[0], $key[1], array(), array('langcode' => $langcode));
$timestamp %= $value;
$granularity--;
}
if ($granularity == 0) {
break;
}
}
return $output ? $output : t('0 sec', array(), array('langcode' => $langcode));
}
/**
* Format a date with the given configured format or a custom format string.
*
* Drupal allows administrators to select formatting strings for 'short',
* 'medium' and 'long' date formats. This function can handle these formats,
* as well as any custom format.
*
* @param $timestamp
* The exact date to format, as a UNIX timestamp.
* @param $type
* The format to use. Can be "short", "medium" or "long" for the preconfigured
* date formats. If "custom" is specified, then $format is required as well.
* @param $format
* A PHP date format string as required by date(). A backslash should be used
* before a character to avoid interpreting the character as part of a date
* format.
* @param $timezone
* Time zone identifier; if omitted, the user's time zone is used.
* @param $langcode
* Optional language code to translate to a language other than what is used
* to display the page.
* @return
* A translated date string in the requested format.
*/
function format_date($timestamp, $type = 'medium', $format = '', $timezone = NULL, $langcode = NULL) {
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['timezones'] = &drupal_static(__FUNCTION__);
}
$timezones = &$drupal_static_fast['timezones'];
if (!isset($timezone)) {
global $user;
if (variable_get('configurable_timezones', 1) && $user->uid && $user->timezone) {
$timezone = $user->timezone;
}
else {
$timezone = variable_get('date_default_timezone', 'UTC');
}
}
// Store DateTimeZone objects in an array rather than repeatedly
// constructing identical objects over the life of a request.
if (!isset($timezones[$timezone])) {
$timezones[$timezone] = timezone_open($timezone);
}
// Use the default langcode if none is set.
global $language;
if (empty($langcode)) {
$langcode = isset($language->language) ? $language->language : 'en';
}
switch ($type) {
case 'short':
$format = variable_get('date_format_short', 'm/d/Y - H:i');
break;
case 'long':
$format = variable_get('date_format_long', 'l, F j, Y - H:i');
break;
case 'custom':
// No change to format.
break;
case 'medium':
default:
$format = variable_get('date_format_medium', 'D, m/d/Y - H:i');
}
// Create a DateTime object from the timestamp.
$date_time = date_create('@' . $timestamp);
// Set the time zone for the DateTime object.
date_timezone_set($date_time, $timezones[$timezone]);
// Encode markers that should be translated. 'A' becomes '\xEF\AA\xFF'.
// xEF and xFF are invalid UTF-8 sequences, and we assume they are not in the
// input string.
// Paired backslashes are isolated to prevent errors in read-ahead evaluation.
// The read-ahead expression ensures that A matches, but not \A.
$format = preg_replace(array('/\\\\\\\\/', '/(?<!\\\\)([AaeDlMTF])/'), array("\xEF\\\\\\\\\xFF", "\xEF\\\\\$1\$1\xFF"), $format);
// Call date_format().
$format = date_format($date_time, $format);
// Pass the langcode to _format_date_callback().
_format_date_callback(NULL, $langcode);
// Translate the marked sequences.
return preg_replace_callback('/\xEF([AaeDlMTF]?)(.*?)\xFF/', '_format_date_callback', $format);
}
/**
* Returns an ISO8601 formatted date based on the given date.
*
* Can be used as a callback for RDF mappings.
*
* @param $date
* A UNIX timestamp.
* @return string
* An ISO8601 formatted date.
*/
function date_iso8601($date) {
// The DATE_ISO8601 constant cannot be used here because it does not match
// date('c') and produces invalid RDF markup.
return date('c', $date);
}
/**
* Callback function for preg_replace_callback().
*/
function _format_date_callback(array $matches = NULL, $new_langcode = NULL) {
// We cache translations to avoid redundant and rather costly calls to t().
static $cache, $langcode;
if (!isset($matches)) {
$langcode = $new_langcode;
return;
}
$code = $matches[1];
$string = $matches[2];
if (!isset($cache[$langcode][$code][$string])) {
$options = array(
'langcode' => $langcode,
);
if ($code == 'F') {
$options['context'] = 'Long month name';
}
if ($code == '') {
$cache[$langcode][$code][$string] = $string;
}
else {
$cache[$langcode][$code][$string] = t($string, array(), $options);
}
}
return $cache[$langcode][$code][$string];
}
/**
* Format a username.
*
* By default, the passed in object's 'name' property is used if it exists, or
* else, the site-defined value for the 'anonymous' variable. However, a module
* may override this by implementing hook_username_alter(&$name, $account).
*
* @see hook_username_alter()
*
* @param $account
* The account object for the user whose name is to be formatted.
*
* @return
* An unsanitized string with the username to display. The code receiving
* this result must ensure that check_plain() is called on it before it is
* printed to the page.
*/
function format_username($account) {
$name = !empty($account->name) ? $account->name : variable_get('anonymous', t('Anonymous'));
drupal_alter('username', $name, $account);
return $name;
}
/**
* @} End of "defgroup format".
*/
/**
* Generate a URL.
*
* @param $path
* The Drupal path being linked to, such as "admin/content", or an existing
* URL like "http://drupal.org/". The special path '<front>' may also be given
* and will generate the site's base URL.
* @param $options
* An associative array of additional options, with the following keys:
* - 'query': An array of query key/value-pairs (without any URL-encoding) to
* append to the link.
* - 'fragment': A fragment identifier (or named anchor) to append to the
* link. Do not include the leading '#' character.
* - 'absolute': Defaults to FALSE. Whether to force the output to be an
* absolute link (beginning with http:). Useful for links that will be
* displayed outside the site, such as in a RSS feed.
* - 'alias': Defaults to FALSE. Whether the given path is a URL alias
* already.
* - 'external': Whether the given path is an external URL.
* - 'language': An optional language object. If the path being linked to is
* internal to the site, $options['language'] is used to look up the alias
* for the URL. If $options['language'] is omitted, the global $language
* will be used.
* - 'https': Whether this URL should point to a secure location. If not
* defined, the current scheme is used, so the user stays on http or https
* respectively. TRUE enforces HTTPS and FALSE enforces HTTP, but HTTPS can
* only be enforced when the variable 'https' is set to TRUE.
* - 'base_url': Only used internally, to modify the base URL when a language
* dependent URL requires so.
* - 'prefix': Only used internally, to modify the path when a language
* dependent URL requires so.
*
* @return
* A string containing a URL to the given path.
*
* When creating links in modules, consider whether l() could be a better
* alternative than url().
*/
function url($path = NULL, array $options = array()) {
// Merge in defaults.
$options += array(
'fragment' => '',
'query' => array(),
'absolute' => FALSE,
'alias' => FALSE,
'prefix' => ''
);
if (!isset($options['external'])) {
// Return an external link if $path contains an allowed absolute URL.
// Only call the slow filter_xss_bad_protocol if $path contains a ':'
// before any / ? or #.
// Note: we could use url_is_external($path) here, but that would
// require another function call, and performance inside url() is critical.
$colonpos = strpos($path, ':');
$options['external'] = ($colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path));
}
// Preserve the original path before altering or aliasing.
$original_path = $path;
// Allow other modules to alter the outbound URL and options.
drupal_alter('url_outbound', $path, $options, $original_path);
if ($options['fragment']) {
$options['fragment'] = '#' . $options['fragment'];
}
if ($options['external']) {
// Split off the fragment.
if (strpos($path, '#') !== FALSE) {
list($path, $old_fragment) = explode('#', $path, 2);
// If $options contains no fragment, take it over from the path.
if (isset($old_fragment) && !$options['fragment']) {
$options['fragment'] = '#' . $old_fragment;
}
}
// Append the query.
if ($options['query']) {
$path .= (strpos($path, '?') !== FALSE ? '&' : '?') . drupal_http_build_query($options['query']);
}
if (isset($options['https']) && variable_get('https', FALSE)) {
if ($options['https'] === TRUE) {
$path = str_replace('http://', 'https://', $path);
}
elseif ($options['https'] === FALSE) {
$path = str_replace('https://', 'http://', $path);
}
}
// Reassemble.
return $path . $options['fragment'];
}
global $base_url, $base_secure_url, $base_insecure_url;
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['script'] = &drupal_static(__FUNCTION__);
}
$script = &$drupal_static_fast['script'];
if (!isset($script)) {
// On some web servers, such as IIS, we can't omit "index.php". So, we
// generate "index.php?q=foo" instead of "?q=foo" on anything that is not
// Apache.
$script = (strpos($_SERVER['SERVER_SOFTWARE'], 'Apache') === FALSE) ? 'index.php' : '';
}
// The base_url might be rewritten from the language rewrite in domain mode.
if (!isset($options['base_url'])) {
if (isset($options['https']) && variable_get('https', FALSE)) {
if ($options['https'] === TRUE) {
$options['base_url'] = $base_secure_url;
$options['absolute'] = TRUE;
}
elseif ($options['https'] === FALSE) {
$options['base_url'] = $base_insecure_url;
$options['absolute'] = TRUE;
}
}
else {
$options['base_url'] = $base_url;
}
}
// The special path '<front>' links to the default front page.
if ($path == '<front>') {
$path = '';
}
elseif (!empty($path) && !$options['alias']) {
$language = isset($options['language']) && isset($options['language']->language) ? $options['language']->language : '';
$alias = drupal_get_path_alias($original_path, $language);
if ($alias != $original_path) {
$path = $alias;
}
}
$base = $options['absolute'] ? $options['base_url'] . '/' : base_path();
$prefix = empty($path) ? rtrim($options['prefix'], '/') : $options['prefix'];
// With Clean URLs.
if (!empty($GLOBALS['conf']['clean_url'])) {
$path = drupal_encode_path($prefix . $path);
if ($options['query']) {
return $base . $path . '?' . drupal_http_build_query($options['query']) . $options['fragment'];
}
else {
return $base . $path . $options['fragment'];
}
}
// Without Clean URLs.
else {
$path = $prefix . $path;
$query = array();
if (!empty($path)) {
$query['q'] = $path;
}
if ($options['query']) {
// We do not use array_merge() here to prevent overriding $path via query
// parameters.
$query += $options['query'];
}
if ($query) {
return $base . $script . '?' . drupal_http_build_query($query) . $options['fragment'];
}
else {
return $base . $options['fragment'];
}
}
}
/**
* Return TRUE if a path is external (e.g. http://example.com).
*/
function url_is_external($path) {
$colonpos = strpos($path, ':');
// Only call the slow filter_xss_bad_protocol if $path contains a ':'
// before any / ? or #.
return $colonpos !== FALSE && !preg_match('![/?#]!', substr($path, 0, $colonpos)) && filter_xss_bad_protocol($path, FALSE) == check_plain($path);
}
/**
* Format an attribute string for a HTTP header.
*
* @param $attributes
* An associative array of attributes such as 'rel'.
*
* @return
* A ; separated string ready for insertion in a HTTP header. No escaping is
* performed for HTML entities, so this string is not safe to be printed.
*
* @see drupal_add_http_header()
*/
function drupal_http_header_attributes(array $attributes = array()) {
foreach ($attributes as $attribute => &$data) {
if (is_array($data)) {
$data = implode(' ', $data);
}
$data = $attribute . '="' . $data . '"';
}
return $attributes ? ' ' . implode('; ', $attributes) : '';
}
/**
* Format an attribute string to insert in a tag.
*
* Each array key and its value will be formatted into an HTML attribute string.
* If a value is itself an array, then each array element is concatenated with a
* space between each value (e.g. a multi-value class attribute).
*
* @param $attributes
* An associative array of HTML attributes.
* @return
* An HTML string ready for insertion in a tag.
*/
function drupal_attributes(array $attributes = array()) {
foreach ($attributes as $attribute => &$data) {
if (is_array($data)) {
$data = implode(' ', $data);
}
$data = $attribute . '="' . check_plain($data) . '"';
}
return $attributes ? ' ' . implode(' ', $attributes) : '';
}
/**
* Format an internal Drupal link.
*
* This function correctly handles aliased paths, and allows themes to highlight
* links to the current page correctly, so all internal links output by modules
* should be generated by this function if possible.
*
* @param $text
* The text to be enclosed with the anchor tag.
* @param $path
* The Drupal path being linked to, such as "admin/content". Can be an
* external or internal URL.
* - If you provide the full URL, it will be considered an external URL.
* - If you provide only the path (e.g. "admin/content"), it is
* considered an internal link. In this case, it must be a system URL
* as the url() function will generate the alias.
* - If you provide '<front>', it generates a link to the site's
* base URL (again via the url() function).
* - If you provide a path, and 'alias' is set to TRUE (see below), it is
* used as is.
* @param $options
* An associative array of additional options, with the following keys:
* - attributes: An associative array of HTML attributes to apply to the
* anchor tag.
* - query: A query string to append to the link, or an array of query
* key/value properties.
* - fragment: A fragment identifier (named anchor) to append to the link.
* Do not include the '#' character.
* - absolute: (default FALSE) Whether to force the output to be an absolute
* link (beginning with http:). Useful for links that will be displayed
* outside the site, such as in an RSS feed.
* - html: (default FALSE) Whether $text is HTML, or just plain-text. For
* example for making an image a link, this must be set to TRUE, or else
* you will see the escaped HTML.
* - alias: (default FALSE) Whether the given path is an alias already.
* - language: An optional language object. If the path being linked to is
* internal to the site, $options['language'] is used to look up the alias
* for the URL, and to determine whether the link is "active", or pointing
* to the current page (the language as well as the path must match). If
* $options['language'] is omitted, the language defined by the current
* page's URL will be used; this depends on the site's language
* negotiation settings (sub-domain or URL prefix).
*
* @return
* an HTML string containing a link to the given path.
*/
function l($text, $path, array $options = array()) {
global $language_url;
static $use_theme = NULL;
// Merge in defaults.
$options += array(
'attributes' => array(),
'html' => FALSE,
);
// Append active class.
if (($path == $_GET['q'] || ($path == '<front>' && drupal_is_front_page())) &&
(empty($options['language']) || $options['language']->language == $language_url->language)) {
$options['attributes']['class'][] = 'active';
}
// Remove all HTML and PHP tags from a tooltip. For best performance, we act only
// if a quick strpos() pre-check gave a suspicion (because strip_tags() is expensive).
if (isset($options['attributes']['title']) && strpos($options['attributes']['title'], '<') !== FALSE) {
$options['attributes']['title'] = strip_tags($options['attributes']['title']);
}
// Determine if rendering of the link is to be done with a theme function
// or the inline default. Inline is faster, but if the theme system has been
// loaded and a module or theme implements a preprocess or process function
// or overrides the theme_link() function, then invoke theme(). Preliminary
// benchmarks indicate that invoking theme() can slow down the l() function
// by 20% or more, and that some of the link-heavy Drupal pages spend more
// than 10% of the total page request time in the l() function.
if (!isset($use_theme) && function_exists('theme')) {
// Allow edge cases to prevent theme initialization and force inline link
// rendering.
if (variable_get('theme_link', TRUE)) {
drupal_theme_initialize();
$registry = theme_get_registry();
// We don't want to duplicate functionality that's in theme(), so any
// hint of a module or theme doing anything at all special with the 'link'
// theme hook should simply result in theme() being called. This includes
// the overriding of theme_link() with an alternate function or template,
// the presence of preprocess or process functions, or the presence of
// include files.
$use_theme = !isset($registry['link']['function']) || ($registry['link']['function'] != 'theme_link');
$use_theme = $use_theme || !empty($registry['link']['preprocess functions']) || !empty($registry['link']['process functions']) || !empty($registry['link']['includes']);
}
else {
$use_theme = FALSE;
}
}
if ($use_theme) {
return theme('link', array('text' => $text, 'path' => $path, 'options' => $options));
}
// The result of url() is a plain-text URL. Because we are using it here
// in an HTML argument context, we need to encode it properly.
return '<a href="' . check_plain(url($path, $options)) . '"' . drupal_attributes($options['attributes']) . '>' . ($options['html'] ? $text : check_plain($text)) . '</a>';
}
/**
* Deliver a page callback result to the browser in the format appropriate.
*
* This function is most commonly called by menu_execute_active_handler(), but
* can also be called by error conditions such as drupal_not_found(),
* drupal_access_denied(), and drupal_site_offline().
*
* When a user requests a page, index.php calls menu_execute_active_handler()
* which calls the 'page callback' function registered in hook_menu(). The page
* callback function can return one of:
* - NULL: to indicate no content
* - an integer menu status constant: to indicate an error condition
* - a string of HTML content
* - a renderable array of content
* Returning a renderable array rather than a string of HTML is preferred,
* because that provides modules with more flexibility in customizing the final
* result.
*
* When the page callback returns its constructed content to
* menu_execute_active_handler(), this functions gets called. The purpose of
* this function is to determine the most appropriate 'delivery callback'
* function to route the content to. The delivery callback function then
* sends the content to the browser in the needed format. The default delivery
* callback is drupal_deliver_html_page() which delivers the content as an HTML
* page, complete with blocks in addition to the content. This default can be
* overridden on a per menu item basis by setting 'delivery callback' in
* hook_menu(), hook_menu_alter(), or hook_menu_active_handler_alter().
* Additionally, modules may use hook_page_delivery_callback_alter() to specify
* a different delivery callback to use for the page request.
*
* For example, the same page callback function can be used for an HTML
* version of the page and an AJAX version of the page. The page callback
* function just needs to decide what content is to be returned and the
* delivery callback function will send it as an HTML page or an AJAX
* response, as appropriate.
*
* In order for page callbacks to be reusable in different delivery formats,
* they should not issue any "print" or "echo" statements, but instead just
* return content.
*
* @param $page_callback_result
* The result of a page callback. Can be one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
* @param $default_delivery_callback
* (Optional) If given, it is the name of a delivery function most likely
* to be appropriate for the page request as determined by the calling
* function (e.g., menu_execute_active_handler()). If not given, it is
* determined from the menu router information of the current page. In either
* case, modules have a final chance to alter which function is called.
*
* @see menu_execute_active_handler()
* @see hook_menu()
* @see hook_menu_alter()
* @see hook_menu_active_handler_alter()
* @see hook_page_delivery_callback_alter()
*/
function drupal_deliver_page($page_callback_result, $default_delivery_callback = NULL) {
if (!isset($default_delivery_callback) && ($router_item = menu_get_item())) {
drupal_alter('menu_active_handler', $router_item);
$default_delivery_callback = $router_item['delivery_callback'];
}
$delivery_callback = !empty($default_delivery_callback) ? $default_delivery_callback : 'drupal_deliver_html_page';
// Give modules a final chance to alter the delivery callback used. This is
// for modules that need to decide which delivery callback to use based on
// information made available during page callback execution and for pages
// without router items.
drupal_alter('page_delivery_callback', $delivery_callback);
if (function_exists($delivery_callback)) {
$delivery_callback($page_callback_result);
}
else {
// If a delivery callback is specified, but doesn't exist as a function,
// something is wrong, but don't print anything, since it's not known
// what format the response needs to be in.
watchdog('delivery callback not found', check_plain($delivery_callback) . ': ' . check_plain($_GET['q']), NULL, WATCHDOG_ERROR);
}
}
/**
* Package and send the result of a page callback to the browser as HTML.
*
* @param $page_callback_result
* The result of a page callback. Can be one of:
* - NULL: to indicate no content.
* - An integer menu status constant: to indicate an error condition.
* - A string of HTML content.
* - A renderable array of content.
*
* @see drupal_deliver_page()
*/
function drupal_deliver_html_page($page_callback_result) {
// Emit the correct charset HTTP header, but not if the page callback
// result is NULL, since that likely indicates that it printed something
// in which case, no further headers may be sent, and not if code running
// for this page request has already set the content type header.
if (isset($page_callback_result) && is_null(drupal_get_http_header('Content-Type'))) {
drupal_add_http_header('Content-Type', 'text/html; charset=utf-8');
}
// Menu status constants are integers; page content is a string or array.
if (is_int($page_callback_result)) {
// @todo: Break these up into separate functions?
switch ($page_callback_result) {
case MENU_NOT_FOUND:
// Print a 404 page.
drupal_add_http_header('Status', '404 Not Found');
watchdog('page not found', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_GET['destination'])) {
$_GET['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_404', ''));
if ($path && $path != $_GET['q']) {
// Custom 404 handler. Set the active item in case there are tabs to
// display, or other dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path, FALSE);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
// Standard 404 handler.
drupal_set_title(t('Page not found'));
$return = t('The requested page could not be found.');
}
drupal_set_page_content($return);
$page = element_info('page');
print drupal_render_page($page);
break;
case MENU_ACCESS_DENIED:
// Print a 403 page.
drupal_add_http_header('Status', '403 Forbidden');
watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
// Keep old path for reference, and to allow forms to redirect to it.
if (!isset($_GET['destination'])) {
$_GET['destination'] = $_GET['q'];
}
$path = drupal_get_normal_path(variable_get('site_403', ''));
if ($path && $path != $_GET['q']) {
// Custom 403 handler. Set the active item in case there are tabs to
// display or other dependencies on the path.
menu_set_active_item($path);
$return = menu_execute_active_handler($path, FALSE);
}
if (empty($return) || $return == MENU_NOT_FOUND || $return == MENU_ACCESS_DENIED) {
// Standard 403 handler.
drupal_set_title(t('Access denied'));
$return = t('You are not authorized to access this page.');
}
print drupal_render_page($return);
break;
case MENU_SITE_OFFLINE:
// Print a 503 page.
drupal_maintenance_theme();
drupal_add_http_header('Status', '503 Service unavailable');
drupal_set_title(t('Site under maintenance'));
print theme('maintenance_page', array('content' => filter_xss_admin(variable_get('maintenance_mode_message',
t('@site is currently under maintenance. We should be back shortly. Thank you for your patience.', array('@site' => variable_get('site_name', 'Drupal')))))));
break;
}
}
elseif (isset($page_callback_result)) {
// Print anything besides a menu constant, assuming it's not NULL or
// undefined.
print drupal_render_page($page_callback_result);
}
// Perform end-of-request tasks.
drupal_page_footer();
}
/**
* Perform end-of-request tasks.
*
* This function sets the page cache if appropriate, and allows modules to
* react to the closing of the page by calling hook_exit().
*/
function drupal_page_footer() {
global $user;
module_invoke_all('exit');
// Commit the user session, if needed.
drupal_session_commit();
if (variable_get('cache', CACHE_DISABLED) != CACHE_DISABLED && ($cache = drupal_page_set_cache())) {
drupal_serve_page_from_cache($cache);
}
else {
ob_flush();
}
_registry_check_code(REGISTRY_WRITE_LOOKUP_CACHE);
drupal_cache_system_paths();
module_implements_write_cache();
system_run_automated_cron();
}
/**
* Perform end-of-request tasks.
*
* In some cases page requests need to end without calling drupal_page_footer().
* In these cases, call drupal_exit() instead. There should rarely be a reason
* to call exit instead of drupal_exit();
*
* @param $destination
* If this function is called from drupal_goto(), then this argument
* will be a fully-qualified URL that is the destination of the redirect.
* This should be passed along to hook_exit() implementations.
*/
function drupal_exit($destination = NULL) {
if (drupal_get_bootstrap_phase() == DRUPAL_BOOTSTRAP_FULL) {
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
module_invoke_all('exit', $destination);
}
drupal_session_commit();
}
exit;
}
/**
* Form an associative array from a linear array.
*
* This function walks through the provided array and constructs an associative
* array out of it. The keys of the resulting array will be the values of the
* input array. The values will be the same as the keys unless a function is
* specified, in which case the output of the function is used for the values
* instead.
*
* @param $array
* A linear array.
* @param $function
* A name of a function to apply to all values before output.
* @result
* An associative array.
*/
function drupal_map_assoc($array, $function = NULL) {
$array = array_combine($array, $array);
if (is_callable($function)) {
$array = array_map($function, $array);
}
return $array;
}
/**
* Attempts to set the PHP maximum execution time.
*
* This function is a wrapper around the PHP function set_time_limit().
* When called, set_time_limit() restarts the timeout counter from zero.
* In other words, if the timeout is the default 30 seconds, and 25 seconds
* into script execution a call such as set_time_limit(20) is made, the
* script will run for a total of 45 seconds before timing out.
*
* It also means that it is possible to decrease the total time limit if
* the sum of the new time limit and the current time spent running the
* script is inferior to the original time limit. It is inherent to the way
* set_time_limit() works, it should rather be called with an appropriate
* value every time you need to allocate a certain amount of time
* to execute a task than only once at the beginning of the script.
*
* Before calling set_time_limit(), we check if this function is available
* because it could be disabled by the server administrator. We also hide all
* the errors that could occur when calling set_time_limit(), because it is
* not possible to reliably ensure that PHP or a security extension will
* not issue a warning/error if they prevent the use of this function.
*
* @param $time_limit
* An integer specifying the new time limit, in seconds. A value of 0
* indicates unlimited execution time.
*
* @ingroup php_wrappers
*/
function drupal_set_time_limit($time_limit) {
if (function_exists('set_time_limit')) {
@set_time_limit($time_limit);
}
}
/**
* Returns the path to a system item (module, theme, etc.).
*
* @param $type
* The type of the item (i.e. theme, theme_engine, module, profile).
* @param $name
* The name of the item for which the path is requested.
*
* @return
* The path to the requested item.
*/
function drupal_get_path($type, $name) {
return dirname(drupal_get_filename($type, $name));
}
/**
* Return the base URL path (i.e., directory) of the Drupal installation.
*
* base_path() prefixes and suffixes a "/" onto the returned path if the path is
* not empty. At the very least, this will return "/".
*
* Examples:
* - http://example.com returns "/" because the path is empty.
* - http://example.com/drupal/folder returns "/drupal/folder/".
*/
function base_path() {
return $GLOBALS['base_path'];
}
/**
* Add a LINK tag with a distinct 'rel' attribute to the page's HEAD.
*
* This function can be called as long the HTML header hasn't been sent,
* which on normal pages is up through the preprocess step of theme('html').
* Adding a link will overwrite a prior link with the exact same 'rel' and
* 'href' attributes.
*
* @param $attributes
* Associative array of element attributes including 'href' and 'rel'.
* @param $header
* Optional flag to determine if a HTTP 'Link:' header should be sent.
*/
function drupal_add_html_head_link($attributes, $header = FALSE) {
$element = array(
'#tag' => 'link',
'#attributes' => $attributes,
);
$href = $attributes['href'];
if ($header) {
// Also add a HTTP header "Link:".
$href = '<' . check_plain($attributes['href']) . '>;';
unset($attributes['href']);
$element['#attached']['drupal_add_http_header'][] = array('Link', $href . drupal_http_header_attributes($attributes), TRUE);
}
drupal_add_html_head($element, 'drupal_add_html_head_link:' . $attributes['rel'] . ':' . $href);
}
/**
* Adds a cascading stylesheet to the stylesheet queue.
*
* Calling drupal_static_reset('drupal_add_css') will clear all cascading
* stylesheets added so far.
*
* If preprocessing is turned on, the cascading style sheets added using this
* function will be preprocessed before they are added to the HTML header of the
* page. Preprocessing merges all the CSS files into one file, which is then
* compressed by removing all extraneous white space. Note that preprocessed
* inline stylesheets will not be aggregated into this single file; instead,
* they will just be compressed when being output on the page. External
* stylesheets will also not be aggregated.
*
* The reason for merging the CSS files is outlined quite thoroughly here:
* http://www.die.net/musings/page_load_time/ "Load fewer external objects. Due
* to request overhead, one bigger file just loads faster than two smaller ones
* half its size."
*
* However, you should *not* preprocess every file as this can lead to redundant
* caches. You should set $options['preprocess'] to FALSE when your styles are
* only used on a few pages of the site. This could be a special admin page, the
* homepage, or a handful of pages that does not represent the majority of the
* pages on your site.
*
* Typical candidates for preprocessing are for example styles for nodes across
* the site, or styles used in the theme.
*
* @param $data
* (optional) The stylesheet data to be added, depending on what is passed
* through to the $options['type'] parameter:
* - 'file': The path to the CSS file relative to the base_path(), e.g.,
* "modules/devel/devel.css". Note that Modules should always prefix the
* names of their CSS files with the module name; for example,
* system-menus.css rather than simply menus.css. Themes can override
* module-supplied CSS files based on their filenames, and this prefixing
* helps prevent confusing name collisions for theme developers. See
* drupal_get_css() where the overrides are performed. Also, if the
* direction of the current language is right-to-left (Hebrew, Arabic,
* etc.), the function will also look for an RTL CSS file and append it to
* the list. The name of this file should have an '-rtl.css' suffix. For
* example a CSS file called 'mymodule-name.css' will have a
* 'mymodule-name-rtl.css' file added to the list, if exists in the same
* directory. This CSS file should contain overrides for properties which
* should be reversed or otherwise different in a right-to-left display.
* - 'inline': A string of CSS that should be placed in the given scope. Note
* that it is better practice to use 'file' stylesheets, rather than
* 'inline', as the CSS would then be aggregated and cached.
* - 'external': The absolute path to an external CSS file that is not hosted
* on the local server. These files will not be aggregated if CSS
* aggregation is enabled.
* @param $options
* (optional) A string defining the 'type' of CSS that is being added in the
* $data parameter ('file', 'inline', or 'external'), or an array which can
* have any or all of the following keys:
* - 'type': The type of stylesheet being added. Available options are 'file',
* 'inline' or 'external'. Defaults to 'file'.
* - 'weight': The weight of the stylesheet specifies the order in which the
* CSS will appear when presented on the page. Available constants are:
* - CSS_SYSTEM: Any system-layer CSS.
* - CSS_DEFAULT: Any module-layer CSS.
* - CSS_THEME: Any theme-layer CSS.
* If you need to embed a CSS file before any other module's stylesheets,
* for example, you would use CSS_DEFAULT - 1. Note that inline CSS is
* simply appended to the end of the specified scope (region), so they
* always come last.
* - 'media': The media type for the stylesheet, e.g., all, print, screen.
* Defaults to 'all'.
* - 'preprocess': If TRUE, Allows the CSS to be aggregated and compressed if
* the Optimize CSS feature has been turned on under the performance
* section. Defaults to TRUE.
* - 'browsers': An array containing information specifying which browsers
* should load the CSS item. See drupal_pre_render_conditional_comments()
* for details.
*
* @return
* An array of queued cascading stylesheets.
*/
function drupal_add_css($data = NULL, $options = NULL) {
$css = &drupal_static(__FUNCTION__, array());
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
// Create an array of CSS files for each media type first, since each type needs to be served
// to the browser differently.
if (isset($data)) {
$options += array(
'type' => 'file',
'weight' => CSS_DEFAULT,
'media' => 'all',
'preprocess' => TRUE,
'data' => $data,
'browsers' => array(),
);
$options['browsers'] += array(
'IE' => TRUE,
'!IE' => TRUE,
);
// Always add a tiny value to the weight, to conserve the insertion order.
$options['weight'] += count($css) / 1000;
// Add the data to the CSS array depending on the type.
switch ($options['type']) {
case 'inline':
// For inline stylesheets, we don't want to use the $data as the array
// key as $data could be a very long string of CSS.
$css[] = $options;
break;
default:
// Local and external files must keep their name as the associative key
// so the same CSS file is not be added twice.
$css[$data] = $options;
}
}
return $css;
}
/**
* Returns a themed representation of all stylesheets that should be attached to the page.
*
* It loads the CSS in order, with 'module' first, then 'theme' afterwards.
* This ensures proper cascading of styles so themes can easily override
* module styles through CSS selectors.
*
* Themes may replace module-defined CSS files by adding a stylesheet with the
* same filename. For example, themes/garland/system-menus.css would replace
* modules/system/system-menus.css. This allows themes to override complete
* CSS files, rather than specific selectors, when necessary.
*
* If the original CSS file is being overridden by a theme, the theme is
* responsible for supplying an accompanying RTL CSS file to replace the
* module's.
*
* @param $css
* (optional) An array of CSS files. If no array is provided, the default
* stylesheets array is used instead.
* @return
* A string of XHTML CSS tags.
*/
function drupal_get_css($css = NULL) {
if (!isset($css)) {
$css = drupal_add_css();
}
// Allow modules to alter the CSS items.
drupal_alter('css', $css);
// Sort CSS items according to their weights.
uasort($css, 'drupal_sort_weight');
// Remove the overridden CSS files. Later CSS files override former ones.
$previous_item = array();
foreach ($css as $key => $item) {
if ($item['type'] == 'file') {
$basename = basename($item['data']);
if (isset($previous_item[$basename])) {
// Remove the previous item that shared the same base name.
unset($css[$previous_item[$basename]]);
}
$previous_item[$basename] = $key;
}
}
// Render the HTML needed to load the CSS.
$styles = array(
'#type' => 'styles',
'#items' => $css,
);
return drupal_render($styles);
}
/**
* Default callback to group CSS items.
*
* This function arranges the CSS items that are in the #items property of the
* styles element into groups. Arranging the CSS items into groups serves two
* purposes. When aggregation is enabled, files within a group are aggregated
* into a single file, significantly improving page loading performance by
* minimizing network traffic overhead. When aggregation is disabled, grouping
* allows multiple files to be loaded from a single STYLE tag, enabling sites
* with many modules enabled or a complex theme being used to stay within IE's
* 31 CSS inclusion tag limit: http://drupal.org/node/228818.
*
* This function puts multiple items into the same group if they are groupable
* and if they are for the same 'media' and 'browsers'. Items of the 'file' type
* are groupable if their 'preprocess' flag is TRUE, items of the 'inline' type
* are always groupable, and items of the 'external' type are never groupable.
* This function also ensures that the process of grouping items does not change
* their relative order. This requirement may result in multiple groups for the
* same type, media, and browsers, if needed to accomodate other items in
* between.
*
* @param $css
* An array of CSS items, as returned by drupal_add_css(), but after
* alteration performed by drupal_get_css().
*
* @return
* An array of CSS groups. Each group contains the same keys (e.g., 'media',
* 'data', etc.) as a CSS item from the $css parameter, with the value of
* each key applying to the group as a whole. Each group also contains an
* 'items' key, which is the subset of items from $css that are in the group.
*
* @see drupal_pre_render_styles()
*/
function drupal_group_css($css) {
$groups = array();
// If a group can contain multiple items, we track the information that must
// be the same for each item in the group, so that when we iterate the next
// item, we can determine if it can be put into the current group, or if a
// new group needs to be made for it.
$current_group_keys = NULL;
// When creating a new group, we pre-increment $i, so by initializing it to
// -1, the first group will have index 0.
$i = -1;
foreach ($css as $item) {
// The browsers for which the CSS item needs to be loaded is part of the
// information that determines when a new group is needed, but the order of
// keys in the array doesn't matter, and we don't want a new group if all
// that's different is that order.
ksort($item['browsers']);
// If the item can be grouped with other items, set $group_keys to an array
// of information that must be the same for all items in its group. If the
// item can't be grouped with other items, set $group_keys to FALSE. We
// put items into a group that can be aggregated together: whether they will
// be aggregated is up to the _drupal_css_aggregate() function or an
// override of that function specified in hook_css_alter(), but regardless
// of the details of that function, a group represents items that can be
// aggregated. Since a group may be rendered with a single HTML tag, all
// items in the group must share the same information that would need to be
// part of that HTML tag.
switch ($item['type']) {
case 'file':
// Group file items if their 'preprocess' flag is TRUE.
$group_keys = $item['preprocess'] ? array($item['type'], $item['media'], $item['browsers']) : FALSE;
break;
case 'inline':
// Always group inline items.
$group_keys = array($item['type'], $item['media'], $item['browsers']);
break;
case 'external':
// Do not group external items.
$group_keys = FALSE;
break;
}
// If the group keys don't match the most recent group we're working with,
// then a new group must be made.
if ($group_keys !== $current_group_keys) {
$i++;
// Initialize the new group with the same properties as the first item
// being placed into it. The item's 'data' and 'weight' properties are
// unique to the item and should not be carried over to the group.
$groups[$i] = $item;
unset($groups[$i]['data'], $groups[$i]['weight']);
$groups[$i]['items'] = array();
$current_group_keys = $group_keys ? $group_keys : NULL;
}
// Add the item to the current group.
$groups[$i]['items'][] = $item;
}
return $groups;
}
/**
* Default callback to aggregate CSS files and inline content.
*
* Having the browser load fewer CSS files results in much faster page loads
* than when it loads many small files. This function aggregates files within
* the same group into a single file unless the site-wide setting to do so is
* disabled (commonly the case during site development). To optimize download,
* it also compresses the aggregate files by removing comments, whitespace, and
* other unnecessary content. Additionally, this functions aggregates inline
* content together, regardless of the site-wide aggregation setting.
*
* @param $css_groups
* An array of CSS groups as returned by drupal_group_css(). This function
* modifies the group's 'data' property for each group that is aggregated.
*
* @see drupal_group_css()
* @see drupal_pre_render_styles()
*/
function drupal_aggregate_css(&$css_groups) {
$preprocess_css = (variable_get('preprocess_css', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
$directory = file_directory_path('public');
$is_writable = is_dir($directory) && is_writable($directory);
// For each group that needs aggregation, aggregate its items.
foreach ($css_groups as $key => $group) {
switch ($group['type']) {
// If a file group can be aggregated into a single file, do so, and set
// the group's data property to the file path of the aggregate file.
case 'file':
if ($group['preprocess'] && $preprocess_css && $is_writable) {
// Prefix filename to prevent blocking by firewalls which reject files
// starting with "ad*".
$filename = 'css_' . md5(serialize($group['items'])) . '.css';
$css_groups[$key]['data'] = drupal_build_css_cache($group['items'], $filename);
}
break;
// Aggregate all inline CSS content into the group's data property.
case 'inline':
$css_groups[$key]['data'] = '';
foreach ($group['items'] as $item) {
$css_groups[$key]['data'] .= drupal_load_stylesheet_content($item['data'], $item['preprocess']);
}
break;
}
}
}
/**
* #pre_render callback to add the elements needed for CSS tags to be rendered.
*
* For production websites, LINK tags are preferable to STYLE tags with @import
* statements, because:
* - They are the standard tag intended for linking to a resource.
* - On Firefox 2 and perhaps other browsers, CSS files included with @import
* statements don't get saved when saving the complete web page for offline
* use: http://drupal.org/node/145218.
* - On IE, if only LINK tags and no @import statements are used, all the CSS
* files are downloaded in parallel, resulting in faster page load, but if
* @import statements are used and span across multiple STYLE tags, all the
* ones from one STYLE tag must be downloaded before downloading begins for
* the next STYLE tag. Furthermore, IE7 does not support media declaration on
* the @import statement, so multiple STYLE tags must be used when different
* files are for different media types. Non-IE browsers always download in
* parallel, so this is an IE-specific performance quirk:
* http://www.stevesouders.com/blog/2009/04/09/dont-use-import/.
*
* However, IE has an annoying limit of 31 total CSS inclusion tags
* (http://drupal.org/node/228818) and LINK tags are limited to one file per
* tag, whereas STYLE tags can contain multiple @import statements allowing
* multiple files to be loaded per tag. When CSS aggregation is disabled, a
* Drupal site can easily have more than 31 CSS files that need to be loaded, so
* using LINK tags exclusively would result in a site that would display
* incorrectly in IE. Depending on different needs, different strategies can be
* employed to decide when to use LINK tags and when to use STYLE tags.
*
* The strategy employed by this function is to use LINK tags for all aggregate
* files and for all files that cannot be aggregated (e.g., if 'preprocess' is
* set to FALSE or the type is 'external'), and to use STYLE tags for groups
* of files that could be aggregated together but aren't (e.g., if the site-wide
* aggregation setting is disabled). This results in all LINK tags when
* aggregation is enabled, a guarantee that as many or only slightly more tags
* are used with aggregation disabled than enabled (so that if the limit were to
* be crossed with aggregation enabled, the site developer would also notice the
* problem while aggregation is disabled), and an easy way for a developer to
* view HTML source while aggregation is disabled and know what files will be
* aggregated together when aggregation becomes enabled.
*
* This function evaluates the aggregation enabled/disabled condition on a group
* by group basis by testing whether an aggregate file has been made for the
* group rather than by testing the site-wide aggregation setting. This allows
* this function to work correctly even if modules have implemented custom
* logic for grouping and aggregating files.
*
* @param $element
* A render array containing:
* - '#items': The CSS items as returned by drupal_add_css() and altered by
* drupal_get_css().
* - '#group_callback': A function to call to group #items to enable the use
* of fewer tags by aggregating files and/or using multiple @import
* statements within a single tag.
* - '#aggregate_callback': A function to call to aggregate the items within
* the groups arranged by the #group_callback function.
*
* @return
* A render array that will render to a string of XHTML CSS tags.
*
* @see drupal_get_css()
*/
function drupal_pre_render_styles($elements) {
// Group and aggregate the items.
if (isset($elements['#group_callback'])) {
$elements['#groups'] = $elements['#group_callback']($elements['#items']);
}
if (isset($elements['#aggregate_callback'])) {
$elements['#aggregate_callback']($elements['#groups']);
}
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed.
$query_string = substr(variable_get('css_js_query_string', '0'), 0, 2);
// Defaults for LINK and STYLE elements.
$link_element_defaults = array(
'#type' => 'html_tag',
'#tag' => 'link',
'#attributes' => array(
'type' => 'text/css',
'rel' => 'stylesheet',
),
);
$style_element_defaults = array(
'#type' => 'html_tag',
'#tag' => 'style',
'#attributes' => array(
'type' => 'text/css',
),
);
// Loop through each group.
foreach ($elements['#groups'] as $group) {
switch ($group['type']) {
// For file items, there are three possibilites.
// - The group has been aggregated: in this case, output a LINK tag for
// the aggregate file.
// - The group can be aggregated but has not been (most likely because
// the site administrator disabled the site-wide setting): in this case,
// output as few STYLE tags for the group as possible, using @import
// statement for each file in the group. This enables us to stay within
// IE's limit of 31 total CSS inclusion tags.
// - The group contains items not eligible for aggregation (their
// 'preprocess' flag has been set to FALSE): in this case, output a LINK
// tag for each file.
case 'file':
// The group has been aggregated into a single file: output a LINK tag
// for the aggregate file.
if (isset($group['data'])) {
$element = $link_element_defaults;
$element['#attributes']['href'] = file_create_url($group['data']) . '?' . $query_string;
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
// The group can be aggregated, but hasn't been: combine multiple items
// into as few STYLE tags as possible.
elseif ($group['preprocess']) {
$import = array();
foreach ($group['items'] as $item) {
// The dummy query string needs to be added to the URL to control
// browser-caching. IE7 does not support a media type on the @import
// statement, so we instead specify the media for the group on the
// STYLE tag.
$query_string_separator = (strpos($item['data'], '?') !== FALSE) ? '&' : '?';
$import[] = '@import url("' . check_plain(file_create_url($item['data']) . $query_string_separator . $query_string) . '");';
}
// In addition to IE's limit of 31 total CSS inclusion tags, it also
// has a limit of 31 @import statements per STYLE tag.
while (!empty($import)) {
$import_batch = array_slice($import, 0, 31);
$import = array_slice($import, 31);
$element = $style_element_defaults;
$element['#value'] = implode("\n", $import_batch);
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
// The group contains items ineligible for aggregation: output a LINK
// tag for each file.
else {
foreach ($group['items'] as $item) {
$element = $link_element_defaults;
// The dummy query string needs to be added to the URL to control
// browser-caching.
$query_string_separator = (strpos($item['data'], '?') !== FALSE) ? '&' : '?';
$element['#attributes']['href'] = file_create_url($item['data']) . $query_string_separator . $query_string;
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
break;
// For inline content, the 'data' property contains the CSS content. If
// the group's 'data' property is set, then output it in a single STYLE
// tag. Otherwise, output a separate STYLE tag for each item.
case 'inline':
if (isset($group['data'])) {
$element = $style_element_defaults;
$element['#value'] = $group['data'];
$element['#attributes']['media'] = $group['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
else {
foreach ($group['items'] as $item) {
$element = $style_element_defaults;
$element['#value'] = $item['data'];
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
}
break;
// Output a LINK tag for each external item. The item's 'data' property
// contains the full URL.
case 'external':
foreach ($group['items'] as $item) {
$element = $link_element_defaults;
$element['#attributes']['href'] = $item['data'];
$element['#attributes']['media'] = $item['media'];
$element['#browsers'] = $group['browsers'];
$elements[] = $element;
}
break;
}
}
return $elements;
}
/**
* Aggregate and optimize CSS files, putting them in the files directory.
*
* @param $css
* An array of CSS files to aggregate and compress into one file.
* @param $filename
* The name of the aggregate CSS file.
* @return
* The name of the CSS file.
*/
function drupal_build_css_cache($css, $filename) {
$data = '';
// Create the css/ within the files folder.
$csspath = 'public://css';
file_prepare_directory($csspath, FILE_CREATE_DIRECTORY);
if (!file_exists($csspath . '/' . $filename)) {
// Build aggregate CSS file.
foreach ($css as $stylesheet) {
// Only 'file' stylesheets can be aggregated.
if ($stylesheet['type'] == 'file') {
$contents = drupal_load_stylesheet($stylesheet['data'], TRUE);
// Return the path to where this CSS file originated from.
$base = base_path() . dirname($stylesheet['data']) . '/';
_drupal_build_css_path(NULL, $base);
// Prefix all paths within this CSS file, ignoring external and absolute paths.
$data .= preg_replace_callback('/url\([\'"]?(?![a-z]+:|\/+)([^\'")]+)[\'"]?\)/i', '_drupal_build_css_path', $contents);
}
}
// Per the W3C specification at http://www.w3.org/TR/REC-CSS2/cascade.html#at-import,
// @import rules must proceed any other style, so we move those to the top.
$regexp = '/@import[^;]+;/i';
preg_match_all($regexp, $data, $matches);
$data = preg_replace($regexp, '', $data);
$data = implode('', $matches[0]) . $data;
// Create the CSS file.
file_unmanaged_save_data($data, $csspath . '/' . $filename, FILE_EXISTS_REPLACE);
}
return $csspath . '/' . $filename;
}
/**
* Helper function for drupal_build_css_cache().
*
* This function will prefix all paths within a CSS file.
*/
function _drupal_build_css_path($matches, $base = NULL) {
$_base = &drupal_static(__FUNCTION__);
// Store base path for preg_replace_callback.
if (isset($base)) {
$_base = $base;
}
// Prefix with base and remove '../' segments where possible.
$path = $_base . $matches[1];
$last = '';
while ($path != $last) {
$last = $path;
$path = preg_replace('`(^|/)(?!\.\./)([^/]+)/\.\./`', '$1', $path);
}
return 'url(' . $path . ')';
}
/**
* Loads the stylesheet and resolves all @import commands.
*
* Loads a stylesheet and replaces @import commands with the contents of the
* imported file. Use this instead of file_get_contents when processing
* stylesheets.
*
* The returned contents are compressed removing white space and comments only
* when CSS aggregation is enabled. This optimization will not apply for
* color.module enabled themes with CSS aggregation turned off.
*
* @param $file
* Name of the stylesheet to be processed.
* @param $optimize
* Defines if CSS contents should be compressed or not.
* @return
* Contents of the stylesheet, including any resolved @import commands.
*/
function drupal_load_stylesheet($file, $optimize = NULL) {
// $_optimize does not use drupal_static as it is set by $optimize.
static $_optimize;
// Store optimization parameter for preg_replace_callback with nested @import loops.
if (isset($optimize)) {
$_optimize = $optimize;
}
$contents = '';
if (file_exists($file)) {
// Load the local CSS stylesheet.
$contents = file_get_contents($file);
// Change to the current stylesheet's directory.
$cwd = getcwd();
chdir(dirname($file));
// Process the stylesheet.
$contents = drupal_load_stylesheet_content($contents, $_optimize);
// Change back directory.
chdir($cwd);
}
return $contents;
}
/**
* Process the contents of a stylesheet for aggregation.
*
* @param $contents
* The contents of the stylesheet.
* @param $optimize
* (optional) Boolean whether CSS contents should be minified. Defaults to
* FALSE.
* @return
* Contents of the stylesheet including the imported stylesheets.
*/
function drupal_load_stylesheet_content($contents, $optimize = FALSE) {
// Remove multiple charset declarations for standards compliance (and fixing Safari problems).
$contents = preg_replace('/^@charset\s+[\'"](\S*)\b[\'"];/i', '', $contents);
if ($optimize) {
// Perform some safe CSS optimizations.
$contents = preg_replace('{
(?<=\\\\\*/)([^/\*]+/\*)([^\*/]+\*/) # Add a backslash also at the end ie-mac hack comment, so the next pass will not touch it.
# The added backslash does not affect the effectiveness of the hack.
}x', '\1\\\\\2', $contents);
$contents = preg_replace('<
\s*([@{}:;,]|\)\s|\s\()\s* | # Remove whitespace around separators, but keep space around parentheses.
/\*[^*\\\\]*\*+([^/*][^*]*\*+)*/ | # Remove comments that are not CSS hacks.
>x', '\1', $contents);
}
// Replaces @import commands with the actual stylesheet content.
// This happens recursively but omits external files.
$contents = preg_replace_callback('/@import\s*(?:url\()?[\'"]?(?![a-z]+:)([^\'"\()]+)[\'"]?\)?;/', '_drupal_load_stylesheet', $contents);
return $contents;
}
/**
* Loads stylesheets recursively and returns contents with corrected paths.
*
* This function is used for recursive loading of stylesheets and
* returns the stylesheet content with all url() paths corrected.
*/
function _drupal_load_stylesheet($matches) {
$filename = $matches[1];
// Load the imported stylesheet and replace @import commands in there as well.
$file = drupal_load_stylesheet($filename);
// Determine the file's directory.
$directory = dirname($filename);
// If the file is in the current directory, make sure '.' doesn't appear in
// the url() path.
$directory = $directory == '.' ? '' : $directory .'/';
// Alter all internal url() paths. Leave external paths alone. We don't need
// to normalize absolute paths here (i.e. remove folder/... segments) because
// that will be done later.
return preg_replace('/url\s*\(([\'"]?)(?![a-z]+:|\/+)/i', 'url(\1'. $directory, $file);
}
/**
* Delete all cached CSS files.
*/
function drupal_clear_css_cache() {
file_scan_directory('public://css', '/.*/', array('callback' => 'file_unmanaged_delete'));
}
/**
* Prepare a string for use as a valid CSS identifier (element, class or ID name).
*
* http://www.w3.org/TR/CSS21/syndata.html#characters shows the syntax for valid
* CSS identifiers (including element names, classes, and IDs in selectors.)
*
* @param $identifier
* The identifier to clean.
* @param $filter
* An array of string replacements to use on the identifier.
* @return
* The cleaned identifier.
*/
function drupal_clean_css_identifier($identifier, $filter = array(' ' => '-', '_' => '-', '/' => '-', '[' => '-', ']' => '')) {
// By default, we filter using Drupal's coding standards.
$identifier = strtr($identifier, $filter);
// Valid characters in a CSS identifier are:
// - the hyphen (U+002D)
// - a-z (U+0030 - U+0039)
// - A-Z (U+0041 - U+005A)
// - the underscore (U+005F)
// - 0-9 (U+0061 - U+007A)
// - ISO 10646 characters U+00A1 and higher
// We strip out any character not in the above list.
$identifier = preg_replace('/[^\x{002D}\x{0030}-\x{0039}\x{0041}-\x{005A}\x{005F}\x{0061}-\x{007A}\x{00A1}-\x{FFFF}]/u', '', $identifier);
return $identifier;
}
/**
* Prepare a string for use as a valid class name.
*
* Do not pass one string containing multiple classes as they will be
* incorrectly concatenated with dashes, i.e. "one two" will become "one-two".
*
* @param $class
* The class name to clean.
* @return
* The cleaned class name.
*/
function drupal_html_class($class) {
return drupal_clean_css_identifier(drupal_strtolower($class));
}
/**
* Prepare a string for use as a valid HTML ID and guarantee uniqueness.
*
* @param $id
* The ID to clean.
* @return
* The cleaned ID.
*/
function drupal_html_id($id) {
$seen_ids = &drupal_static(__FUNCTION__, array());
$id = strtr(drupal_strtolower($id), array(' ' => '-', '_' => '-', '[' => '-', ']' => ''));
// As defined in http://www.w3.org/TR/html4/types.html#type-name, HTML IDs can
// only contain letters, digits ([0-9]), hyphens ("-"), underscores ("_"),
// colons (":"), and periods ("."). We strip out any character not in that
// list. Note that the CSS spec doesn't allow colons or periods in identifiers
// (http://www.w3.org/TR/CSS21/syndata.html#characters), so we strip those two
// characters as well.
$id = preg_replace('/[^A-Za-z0-9\-_]/', '', $id);
// Ensure IDs are unique. The first occurrence is held but left alone.
// Subsequent occurrences get a number appended to them. This incrementing
// will almost certainly break code that relies on explicit HTML IDs in forms
// that appear more than once on the page, but the alternative is outputting
// duplicate IDs, which would break JS code and XHTML validity anyways. For
// now, it's an acceptable stopgap solution.
if (isset($seen_ids[$id])) {
$id = $id . '-' . ++$seen_ids[$id];
}
else {
$seen_ids[$id] = 1;
}
return $id;
}
/**
* Provides a standard HTML class name that identifies a page region.
*
* It is recommended that template preprocess functions apply this class to any
* page region that is output by the theme (Drupal core already handles this in
* the standard template preprocess implementation). Standardizing the class
* names in this way allows modules to implement certain features, such as
* drag-and-drop or dynamic AJAX loading, in a theme-independent way.
*
* @param $region
* The name of the page region (for example, 'page_top' or 'content').
*
* @return
* An HTML class that identifies the region (for example, 'region-page-top'
* or 'region-content').
*
* @see template_preprocess_region()
*/
function drupal_region_class($region) {
return drupal_html_class("region-$region");
}
/**
* Add a JavaScript file, setting or inline code to the page.
*
* The behavior of this function depends on the parameters it is called with.
* Generally, it handles the addition of JavaScript to the page, either as
* reference to an existing file or as inline code. The following actions can be
* performed using this function:
*
* - Add a file ('file'):
* Adds a reference to a JavaScript file to the page.
*
* - Add inline JavaScript code ('inline'):
* Executes a piece of JavaScript code on the current page by placing the code
* directly in the page. This can, for example, be useful to tell the user that
* a new message arrived, by opening a pop up, alert box etc. This should only
* be used for JavaScript which cannot be placed and executed from a file.
* When adding inline code, make sure that you are not relying on $ being jQuery.
* Wrap your code in (function ($) { ... })(jQuery); or use jQuery instead of $.
*
* - Add external JavaScript ('external'):
* Allows the inclusion of external JavaScript files that are not hosted on the
* local server. Note that these external JavaScript references do not get
* aggregated when preprocessing is on.
*
* - Add settings ('setting'):
* Adds a setting to Drupal's global storage of JavaScript settings. Per-page
* settings are required by some modules to function properly. All settings
* will be accessible at Drupal.settings.
*
* Examples:
* @code
* drupal_add_js('misc/collapse.js');
* drupal_add_js('misc/collapse.js', 'file');
* drupal_add_js('jQuery(document).ready(function () { alert("Hello!"); });', 'inline');
* drupal_add_js('jQuery(document).ready(function () { alert("Hello!"); });',
* array('type' => 'inline', 'scope' => 'footer', 'weight' => 5)
* );
* drupal_add_js('http://example.com/example.js', 'external');
* @endcode
*
* Calling drupal_static_reset('drupal_add_js') will clear all JavaScript added
* so far.
*
* @param $data
* (optional) If given, the value depends on the $options parameter:
* - 'file': Path to the file relative to base_path().
* - 'inline': The JavaScript code that should be placed in the given scope.
* - 'external': The absolute path to an external JavaScript file that is not
* hosted on the local server. These files will not be aggregated if
* JavaScript aggregation is enabled.
* - 'setting': An array with configuration options as associative array. The
* array is directly placed in Drupal.settings. All modules should wrap
* their actual configuration settings in another variable to prevent
* the pollution of the Drupal.settings namespace.
* @param $options
* (optional) A string defining the type of JavaScript that is being added
* in the $data parameter ('file'/'setting'/'inline'), or an array which
* can have any or all of the following keys. JavaScript settings should
* always pass the string 'setting' only.
* - type
* The type of JavaScript that is to be added to the page. Allowed
* values are 'file', 'inline', 'external' or 'setting'. Defaults
* to 'file'.
* - scope
* The location in which you want to place the script. Possible values
* are 'header' or 'footer'. If your theme implements different regions,
* however, you can also use these. Defaults to 'header'.
* - weight
* A number defining the order in which the JavaScript is added to the
* page. In some cases, the order in which the JavaScript is presented
* on the page is very important. jQuery, for example, must be added to
* to the page before any jQuery code is run, so jquery.js uses a weight
* of JS_LIBRARY - 2, drupal.js uses a weight of JS_LIBRARY - 1, and all
* following scripts depending on jQuery and Drupal behaviors are simply
* added using the default weight of JS_DEFAULT.
*
* Available constants are:
* - JS_LIBRARY: Any libraries, settings, or jQuery plugins.
* - JS_DEFAULT: Any module-layer JavaScript.
* - JS_THEME: Any theme-layer JavaScript.
*
* If you need to invoke a JavaScript file before any other module's
* JavaScript, for example, you would use JS_DEFAULT - 1.
* Note that inline JavaScripts are simply appended to the end of the
* specified scope (region), so they always come last.
* - defer
* If set to TRUE, the defer attribute is set on the <script> tag.
* Defaults to FALSE.
* - cache
* If set to FALSE, the JavaScript file is loaded anew on every page
* call, that means, it is not cached. Used only when 'type' references
* a JavaScript file. Defaults to TRUE.
* - preprocess
* Aggregate the JavaScript if the JavaScript optimization setting has
* been toggled in admin/config/development/performance. Note that
* JavaScript of type 'external' is not aggregated. Defaults to TRUE.
* - version
* If not empty, the version is added as a query string instead of the
* incremental query string that changes on cache clearing. Primarily
* used for libraries.
* @return
* The constructed array of JavaScript files.
* @see drupal_get_js()
*/
function drupal_add_js($data = NULL, $options = NULL) {
$javascript = &drupal_static(__FUNCTION__, array());
// Construct the options, taking the defaults into consideration.
if (isset($options)) {
if (!is_array($options)) {
$options = array('type' => $options);
}
}
else {
$options = array();
}
$options += drupal_js_defaults($data);
// Preprocess can only be set if caching is enabled.
$options['preprocess'] = $options['cache'] ? $options['preprocess'] : FALSE;
// Tweak the weight so that files of the same weight are included in the
// order of the calls to drupal_add_js().
$options['weight'] += count($javascript) / 1000;
if (isset($data)) {
// Add jquery.js and drupal.js, as well as the basePath setting, the
// first time a Javascript file is added.
if (empty($javascript)) {
$javascript = array(
'settings' => array(
'data' => array(
array('basePath' => base_path()),
),
'type' => 'setting',
'scope' => 'header',
'weight' => JS_LIBRARY,
),
'misc/drupal.js' => array(
'data' => 'misc/drupal.js',
'type' => 'file',
'scope' => 'header',
'weight' => JS_LIBRARY - 1,
'cache' => TRUE,
'defer' => FALSE,
'preprocess' => TRUE,
),
);
// Register all required libraries.
drupal_add_library('system', 'jquery');
drupal_add_library('system', 'once');
}
switch ($options['type']) {
case 'setting':
// All JavaScript settings are placed in the header of the page with
// the library weight so that inline scripts appear afterwards.
$javascript['settings']['data'][] = $data;
break;
case 'inline':
$javascript[] = $options;
break;
default: // 'file' and 'external'
// Local and external files must keep their name as the associative key
// so the same JavaScript file is not be added twice.
$javascript[$options['data']] = $options;
}
}
return $javascript;
}
/**
* Constructs an array of the defaults that are used for JavaScript items.
*
* @param $data
* (optional) The default data parameter for the JavaScript item array.
* @see drupal_get_js()
* @see drupal_add_js()
*/
function drupal_js_defaults($data = NULL) {
return array(
'type' => 'file',
'weight' => JS_DEFAULT,
'scope' => 'header',
'cache' => TRUE,
'defer' => FALSE,
'preprocess' => TRUE,
'version' => NULL,
'data' => $data,
);
}
/**
* Returns a themed presentation of all JavaScript code for the current page.
*
* References to JavaScript files are placed in a certain order: first, all
* 'core' files, then all 'module' and finally all 'theme' JavaScript files
* are added to the page. Then, all settings are output, followed by 'inline'
* JavaScript code. If running update.php, all preprocessing is disabled.
*
* Note that hook_js_alter(&$javascript) is called during this function call
* to allow alterations of the JavaScript during its presentation. Calls to
* drupal_add_js() from hook_js_alter() will not be added to the output
* presentation. The correct way to add JavaScript during hook_js_alter()
* is to add another element to the $javascript array, deriving from
* drupal_js_defaults(). See locale_js_alter() for an example of this.
*
* @param $scope
* (optional) The scope for which the JavaScript rules should be returned.
* Defaults to 'header'.
* @param $javascript
* (optional) An array with all JavaScript code. Defaults to the default
* JavaScript array for the given scope.
* @return
* All JavaScript code segments and includes for the scope as HTML tags.
* @see drupal_add_js()
* @see locale_js_alter()
* @see drupal_js_defaults()
*/
function drupal_get_js($scope = 'header', $javascript = NULL) {
if (!isset($javascript)) {
$javascript = drupal_add_js();
}
if (empty($javascript)) {
return '';
}
// Allow modules to alter the JavaScript.
drupal_alter('js', $javascript);
// Filter out elements of the given scope.
$items = array();
foreach ($javascript as $item) {
if ($item['scope'] == $scope) {
$items[] = $item;
}
}
$output = '';
// The index counter is used to keep aggregated and non-aggregated files in
// order by weight.
$index = 1;
$processed = array();
$files = array();
$preprocess_js = (variable_get('preprocess_js', FALSE) && (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update'));
$directory = file_directory_path('public');
$is_writable = is_dir($directory) && is_writable($directory);
// A dummy query-string is added to filenames, to gain control over
// browser-caching. The string changes on every update or full cache
// flush, forcing browsers to load a new copy of the files, as the
// URL changed. Files that should not be cached (see drupal_add_js())
// get REQUEST_TIME as query-string instead, to enforce reload on every
// page request.
$default_query_string = substr(variable_get('css_js_query_string', '0'), 0, 2);
// For inline Javascript to validate as XHTML, all Javascript containing
// XHTML needs to be wrapped in CDATA. To make that backwards compatible
// with HTML 4, we need to comment out the CDATA-tag.
$embed_prefix = "\n<!--//--><![CDATA[//><!--\n";
$embed_suffix = "\n//--><!]]>\n";
// Since Javascript may look for arguments in the url and act on them, some
// third-party code might require the use of a different query string.
$js_version_string = variable_get('drupal_js_version_query_string', 'v=');
// Sort the JavaScript by weight so that it appears in the correct order.
uasort($items, 'drupal_sort_weight');
// Loop through the JavaScript to construct the rendered output.
$element = array(
'#tag' => 'script',
'#value' => '',
'#attributes' => array(
'type' => 'text/javascript',
),
);
foreach ($items as $item) {
$query_string = empty($item['version']) ? $default_query_string : $js_version_string . $item['version'];
switch ($item['type']) {
case 'setting':
$js_element = $element;
$js_element['#value_prefix'] = $embed_prefix;
$js_element['#value'] = 'jQuery.extend(Drupal.settings, ' . drupal_json_encode(call_user_func_array('array_merge_recursive', $item['data'])) . ");";
$js_element['#value_suffix'] = $embed_suffix;
$output .= theme('html_tag', array('element' => $js_element));
break;
case 'inline':
$js_element = $element;
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$js_element['#value_prefix'] = $embed_prefix;
$js_element['#value'] = $item['data'];
$js_element['#value_suffix'] = $embed_suffix;
$output .= theme('html_tag', array('element' => $js_element));
break;
case 'file':
$js_element = $element;
if (!$item['preprocess'] || !$is_writable || !$preprocess_js) {
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$query_string_separator = (strpos($item['data'], '?') !== FALSE) ? '&' : '?';
$js_element['#attributes']['src'] = file_create_url($item['data']) . $query_string_separator . ($item['cache'] ? $query_string : REQUEST_TIME);
$processed[$index++] = theme('html_tag', array('element' => $js_element));
}
else {
// By increasing the index for each aggregated file, we maintain
// the relative ordering of JS by weight.
$key = 'aggregate' . $index;
$processed[$key] = '';
$files[$key][$item['data']] = $item;
}
break;
case 'external':
$js_element = $element;
// Preprocessing for external JavaScript files is ignored.
if ($item['defer']) {
$js_element['#attributes']['defer'] = 'defer';
}
$js_element['#attributes']['src'] = $item['data'];
$processed[$index++] = theme('html_tag', array('element' => $js_element));
break;
}
}
// Aggregate any remaining JS files that haven't already been output.
if ($is_writable && $preprocess_js && count($files) > 0) {
// Prefix filename to prevent blocking by firewalls which reject files
// starting with "ad*".
foreach ($files as $key => $file_set) {
$filename = 'js_' . md5(serialize($file_set)) . '.js';
$preprocess_file = file_create_url(drupal_build_js_cache($file_set, $filename)) . '?' . $default_query_string;
$js_element = $element;
$js_element['#attributes']['src'] = $preprocess_file;
$processed[$key] = theme('html_tag', array('element' => $js_element));
}
}
// Keep the order of JS files consistent as some are preprocessed and others are not.
// Make sure any inline or JS setting variables appear last after libraries have loaded.
return implode('', $processed) . $output;
}
/**
* Add to the page all structures attached to a render() structure.
*
* Libraries, JavaScript, CSS and other types of custom structures are attached
* to elements using the #attached property. The #attached property contains an
* associative array, where the keys are the the types of the structure, and
* the value the attached data. For example:
* @code
* $build['#attached'] = array(
* 'js' => array(drupal_get_path('module', 'taxonomy') . '/taxonomy.js'),
* 'css' => array(drupal_get_path('module', 'taxonomy') . '/taxonomy.css'),
* );
* @endcode
*
* 'js', 'css', and 'library' are types that get special handling. For any
* other kind of attached data, the array key must be the full name of the
* callback function and each value an array of arguments. For example:
*
* @code
* $build['#attached']['drupal_add_http_header'] = array(
* array('Content-Type', 'application/rss+xml; charset=utf-8'),
* );
* @endcode
*
* @param $elements
* The structured array describing the data being rendered.
* @param $weight
* The default weight of JavaScript and CSS being added. This is only applied
* to the stylesheets and JavaScript items that don't have an explicit weight
* assigned to them.
* @param $dependency_check
* When TRUE, will exit if a given library's dependencies are missing. When
* set to FALSE, will continue to add the libraries, even though one of the
* dependencies are missing. Defaults to FALSE.
* @return
* Will return FALSE if there were any missing library dependencies. TRUE will
* be returned if all library dependencies were met.
*
* @see drupal_add_library().
* @see drupal_add_js().
* @see drupal_add_css().
* @see drupal_render().
*/
function drupal_process_attached($elements, $weight = JS_DEFAULT, $dependency_check = FALSE) {
// Add defaults to the special attached structures that should be processed differently.
$elements['#attached'] += array(
'library' => array(),
'js' => array(),
'css' => array(),
);
// Add the libraries first.
$success = TRUE;
foreach ($elements['#attached']['library'] as $library) {
if (drupal_add_library($library[0], $library[1]) === FALSE) {
$success = FALSE;
// Exit if the dependency is missing.
if ($dependency_check) {
return $success;
}
}
}
unset($elements['#attached']['library']);
// Add both the JavaScript and the CSS.
// The parameters for drupal_add_js() and drupal_add_css() require special
// handling.
foreach (array('js', 'css') as $type) {
foreach ($elements['#attached'][$type] as $data => $options) {
// If the value is not an array, it's a filename and passed as first
// (and only) argument.
if (!is_array($options)) {
$data = $options;
$options = NULL;
}
// In some cases, the first parameter ($data) is an array. Arrays can't be
// passed as keys in PHP, so we have to get $data from the value array.
if (is_numeric($data)) {
$data = $options['data'];
unset($options['data']);
}
// Apply the default weight if the weight isn't explicitly given.
if (!isset($options['weight'])) {
$options['weight'] = $weight;
}
call_user_func('drupal_add_' . $type, $data, $options);
}
unset($elements['#attached'][$type]);
}
// Add additional types of attachments specified in the render() structure.
// Libraries, Javascript and CSS have been added already, as they require
// special handling.
foreach ($elements['#attached'] as $callback => $options) {
if (function_exists($callback)) {
foreach ($elements['#attached'][$callback] as $args) {
call_user_func_array($callback, $args);
}
}
}
return $success;
}
/**
* Adds JavaScript to the element to allow it to have different active states.
*
* @param $elements
* The structured array that may contain an array item named states. This
* array describes the different JavaScript states that can be applied to the
* element when certain conditions are met. The #states array is first keyed
* by one of the following states:
* - enabled
* - invisible
* - invalid
* - untouched
* - optional
* - filled
* - unchecked
* - irrelevant
* - expanded
* - readwrite
*
* Each of these states is an array containing conditions that must be met in
* order for this state to be active. The key to this conditioning array is
* a jQuery selector for the element that is checked. The value of the
* conditioning array are the states that are checked on the element (empty,
* checked, value, collapsed, etc) and the expected value of that condition.
*
* @code
* $form['email_canceled']['settings'] = array(
* '#type' => 'container',
* '#states' => array(
* // Hide the settings when the cancel notify checkbox is disabled.
* 'invisible' => array(
* 'input[name="email_canceled_toggle"]' => array('checked' => FALSE),
* ),
* ),
* );
* @endcode
*/
function drupal_process_states(&$elements) {
$elements['#attached']['js']['misc/states.js'] = array('weight' => JS_LIBRARY + 1);
$elements['#attached']['js'][] = array(
'type' => 'setting',
'data' => array('states' => array('#' . $elements['#id'] => $elements['#states'])),
);
}
/**
* Adds multiple JavaScript or CSS files at the same time.
*
* A library defines a set of JavaScript and/or CSS files, optionally using
* settings, and optionally requiring another library. For example, a library
* can be a jQuery plugin, a JavaScript framework, or a CSS framework. This
* function allows modules to load a library defined/shipped by itself or a
* depending module; without having to add all files of the library separately.
* Each library is only loaded once.
*
* @param $module
* The name of the module that registered the library.
* @param $name
* The name of the library to add.
* @return
* TRUE when the library was successfully added or FALSE if the library or one
* of its dependencies could not be added.
*
* @see drupal_get_library()
* @see hook_library()
* @see hook_library_alter()
*/
function drupal_add_library($module, $name) {
$added = &drupal_static(__FUNCTION__, array());
// Only process the library if it exists and it was not added already.
if (!isset($added[$module][$name])) {
if ($library = drupal_get_library($module, $name)) {
// Add all components within the library.
$elements['#attached'] = array(
'library' => $library['dependencies'],
'js' => $library['js'],
'css' => $library['css'],
);
$added[$module][$name] = drupal_process_attached($elements, JS_LIBRARY, TRUE);
}
else {
// Requested library does not exist.
$added[$module][$name] = FALSE;
}
}
return $added[$module][$name];
}
/**
* Retrieves information for a JavaScript/CSS library.
*
* Library information is statically cached. Libraries are keyed by module for
* several reasons:
* - Libraries are not unique. Multiple modules might ship with the same library
* in a different version or variant. This registry cannot (and does not
* attempt to) prevent library conflicts.
* - Modules implementing and thereby depending on a library that is registered
* by another module can only rely on that module's library.
* - Two (or more) modules can still register the same library and use it
* without conflicts in case the libraries are loaded on certain pages only.
*
* @param $module
* The name of a module that registered a library.
* @param $library
* The name of a registered library.
* @return
* The definition of the requested library, if existent, or FALSE.
*
* @see drupal_add_library()
* @see hook_library()
* @see hook_library_alter()
*
* @todo The purpose of drupal_get_*() is completely different to other page
* requisite API functions; find and use a different name.
*/
function drupal_get_library($module, $name) {
$libraries = &drupal_static(__FUNCTION__, array());
if (!isset($libraries[$module])) {
// Retrieve all libraries associated with the module.
$module_libraries = module_invoke($module, 'library');
if (empty($module_libraries)) {
$module_libraries = array();
}
// Allow modules to alter the module's registered libraries.
drupal_alter('library', $module_libraries, $module);
foreach ($module_libraries as $key => $data) {
if (is_array($data)) {
// Add default elements to allow for easier processing.
$module_libraries[$key] += array('dependencies' => array(), 'js' => array(), 'css' => array());
foreach ($module_libraries[$key]['js'] as $file => $options) {
$module_libraries[$key]['js'][$file]['version'] = $module_libraries[$key]['version'];
}
}
}
$libraries[$module] = $module_libraries;
}
if (empty($libraries[$module][$name])) {
$libraries[$module][$name] = FALSE;
}
return $libraries[$module][$name];
}
/**
* Assist in adding the tableDrag JavaScript behavior to a themed table.
*
* Draggable tables should be used wherever an outline or list of sortable items
* needs to be arranged by an end-user. Draggable tables are very flexible and
* can manipulate the value of form elements placed within individual columns.
*
* To set up a table to use drag and drop in place of weight select-lists or
* in place of a form that contains parent relationships, the form must be
* themed into a table. The table must have an id attribute set. If using
* theme_table(), the id may be set as such:
* @code
* $output = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'my-module-table')));
* return $output;
* @endcode
*
* In the theme function for the form, a special class must be added to each
* form element within the same column, "grouping" them together.
*
* In a situation where a single weight column is being sorted in the table, the
* classes could be added like this (in the theme function):
* @code
* $form['my_elements'][$delta]['weight']['#attributes']['class'] = array('my-elements-weight');
* @endcode
*
* Each row of the table must also have a class of "draggable" in order to enable the
* drag handles:
* @code
* $row = array(...);
* $rows[] = array(
* 'data' => $row,
* 'class' => array('draggable'),
* );
* @endcode
*
* When tree relationships are present, the two additional classes
* 'tabledrag-leaf' and 'tabledrag-root' can be used to refine the behavior:
* - Rows with the 'tabledrag-leaf' class cannot have child rows.
* - Rows with the 'tabledrag-root' class cannot be nested under a parent row.
*
* Calling drupal_add_tabledrag() would then be written as such:
* @code
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight');
* @endcode
*
* In a more complex case where there are several groups in one column (such as
* the block regions on the admin/structure/block page), a separate subgroup class
* must also be added to differentiate the groups.
* @code
* $form['my_elements'][$region][$delta]['weight']['#attributes']['class'] = array('my-elements-weight', 'my-elements-weight-' . $region);
* @endcode
*
* $group is still 'my-element-weight', and the additional $subgroup variable
* will be passed in as 'my-elements-weight-' . $region. This also means that
* you'll need to call drupal_add_tabledrag() once for every region added.
*
* @code
* foreach ($regions as $region) {
* drupal_add_tabledrag('my-module-table', 'order', 'sibling', 'my-elements-weight', 'my-elements-weight-' . $region);
* }
* @endcode
*
* In a situation where tree relationships are present, adding multiple
* subgroups is not necessary, because the table will contain indentations that
* provide enough information about the sibling and parent relationships.
* See theme_menu_overview_form() for an example creating a table containing
* parent relationships.
*
* Please note that this function should be called from the theme layer, such as
* in a .tpl.php file, theme_ function, or in a template_preprocess function,
* not in a form declaration. Though the same JavaScript could be added to the
* page using drupal_add_js() directly, this function helps keep template files
* clean and readable. It also prevents tabledrag.js from being added twice
* accidentally.
*
* @param $table_id
* String containing the target table's id attribute. If the table does not
* have an id, one will need to be set, such as <table id="my-module-table">.
* @param $action
* String describing the action to be done on the form item. Either 'match'
* 'depth', or 'order'. Match is typically used for parent relationships.
* Order is typically used to set weights on other form elements with the same
* group. Depth updates the target element with the current indentation.
* @param $relationship
* String describing where the $action variable should be performed. Either
* 'parent', 'sibling', 'group', or 'self'. Parent will only look for fields
* up the tree. Sibling will look for fields in the same group in rows above
* and below it. Self affects the dragged row itself. Group affects the
* dragged row, plus any children below it (the entire dragged group).
* @param $group
* A class name applied on all related form elements for this action.
* @param $subgroup
* (optional) If the group has several subgroups within it, this string should
* contain the class name identifying fields in the same subgroup.
* @param $source
* (optional) If the $action is 'match', this string should contain the class
* name identifying what field will be used as the source value when matching
* the value in $subgroup.
* @param $hidden
* (optional) The column containing the field elements may be entirely hidden
* from view dynamically when the JavaScript is loaded. Set to FALSE if the
* column should not be hidden.
* @param $limit
* (optional) Limit the maximum amount of parenting in this table.
* @see block-admin-display-form.tpl.php
* @see theme_menu_overview_form()
*/
function drupal_add_tabledrag($table_id, $action, $relationship, $group, $subgroup = NULL, $source = NULL, $hidden = TRUE, $limit = 0) {
$js_added = &drupal_static(__FUNCTION__, FALSE);
if (!$js_added) {
// Add the table drag JavaScript to the page before the module JavaScript
// to ensure that table drag behaviors are registered before any module
// uses it.
drupal_add_js('misc/tabledrag.js', array('weight' => JS_DEFAULT - 1));
$js_added = TRUE;
}
// If a subgroup or source isn't set, assume it is the same as the group.
$target = isset($subgroup) ? $subgroup : $group;
$source = isset($source) ? $source : $target;
$settings['tableDrag'][$table_id][$group][] = array(
'target' => $target,
'source' => $source,
'relationship' => $relationship,
'action' => $action,
'hidden' => $hidden,
'limit' => $limit,
);
drupal_add_js($settings, 'setting');
}
/**
* Aggregate JS files, putting them in the files directory.
*
* @param $files
* An array of JS files to aggregate and compress into one file.
* @param $filename
* The name of the aggregate JS file.
* @return
* The name of the JS file.
*/
function drupal_build_js_cache($files, $filename) {
$contents = '';
// Create the js/ within the files folder.
$jspath = 'public://js';
file_prepare_directory($jspath, FILE_CREATE_DIRECTORY);
if (!file_exists($jspath . '/' . $filename)) {
// Build aggregate JS file.
foreach ($files as $path => $info) {
if ($info['preprocess']) {
// Append a ';' after each JS file to prevent them from running together.
$contents .= file_get_contents($path) . ';';
}
}
// Create the JS file.
file_unmanaged_save_data($contents, $jspath . '/' . $filename, FILE_EXISTS_REPLACE);
}
return $jspath . '/' . $filename;
}
/**
* Delete all cached JS files.
*/
function drupal_clear_js_cache() {
file_scan_directory('public://js', '/.*/', array('callback' => 'file_unmanaged_delete'));
variable_set('javascript_parsed', array());
}
/**
* Converts a PHP variable into its Javascript equivalent.
*
* We use HTML-safe strings, i.e. with <, > and & escaped.
*
* @see drupal_json_decode()
* @ingroup php_wrappers
*/
function drupal_json_encode($var) {
// json_encode() does not escape <, > and &, so we do it with str_replace().
return str_replace(array('<', '>', '&'), array('\u003c', '\u003e', '\u0026'), json_encode($var));
}
/**
* Converts an HTML-safe JSON string into its PHP equivalent.
*
* @see drupal_json_encode()
* @ingroup php_wrappers
*/
function drupal_json_decode($var) {
return json_decode($var, TRUE);
}
/**
* Return data in JSON format.
*
* This function should be used for JavaScript callback functions returning
* data in JSON format. It sets the header for JavaScript output.
*
* @param $var
* (optional) If set, the variable will be converted to JSON and output.
*/
function drupal_json_output($var = NULL) {
// We are returning JavaScript, so tell the browser.
drupal_add_http_header('Content-Type', 'text/javascript; charset=utf-8');
if (isset($var)) {
echo drupal_json_encode($var);
}
}
/**
* Returns a string of highly randomized bytes (over the full 8-bit range).
*
* This function is better than simply calling mt_rand() or any other built-in
* PHP function because it can return a long string of bytes (compared to < 4
* bytes normally from mt_rand()) and uses the best available pseudo-random source.
*
* @param $count
* The number of characters (bytes) to return in the string.
*/
function drupal_random_bytes($count) {
// $random_state does not use drupal_static as it stores random bytes.
static $random_state;
// We initialize with the somewhat random PHP process ID on the first call.
if (empty($random_state)) {
$random_state = getmypid();
}
$output = '';
// /dev/urandom is available on many *nix systems and is considered the best
// commonly available pseudo-random source.
if ($fh = @fopen('/dev/urandom', 'rb')) {
$output = fread($fh, $count);
fclose($fh);
}
// If /dev/urandom is not available or returns no bytes, this loop will
// generate a good set of pseudo-random bytes on any system.
// Note that it may be important that our $random_state is passed
// through md5() prior to being rolled into $output, that the two md5()
// invocations are different, and that the extra input into the first one -
// the microtime() - is prepended rather than appended. This is to avoid
// directly leaking $random_state via the $output stream, which could
// allow for trivial prediction of further "random" numbers.
while (strlen($output) < $count) {
$random_state = md5(microtime() . mt_rand() . $random_state);
$output .= md5(mt_rand() . $random_state, TRUE);
}
return substr($output, 0, $count);
}
/**
* Get a salt useful for hardening against SQL injection.
*
* @return
* A salt based on information in settings.php, not in the database.
*/
function drupal_get_hash_salt() {
global $drupal_hash_salt, $databases;
// If the $drupal_hash_salt variable is empty, a hash of the serialized
// database credentials is used as a fallback salt.
return empty($drupal_hash_salt) ? sha1(serialize($databases)) : $drupal_hash_salt;
}
/**
* Ensure the private key variable used to generate tokens is set.
*
* @return
* The private key.
*/
function drupal_get_private_key() {
if (!($key = variable_get('drupal_private_key', 0))) {
$key = md5(drupal_random_bytes(64));
variable_set('drupal_private_key', $key);
}
return $key;
}
/**
* Generate a token based on $value, the current user session and private key.
*
* @param $value
* An additional value to base the token on.
*/
function drupal_get_token($value = '') {
$private_key = drupal_get_private_key();
// A single md5() is vulnerable to length-extension attacks, so use it twice.
// @todo: add md5 and sha1 hmac functions to core.
return md5(drupal_get_hash_salt() . md5(session_id() . $value . $private_key));
}
/**
* Validate a token based on $value, the current user session and private key.
*
* @param $token
* The token to be validated.
* @param $value
* An additional value to base the token on.
* @param $skip_anonymous
* Set to true to skip token validation for anonymous users.
* @return
* True for a valid token, false for an invalid token. When $skip_anonymous
* is true, the return value will always be true for anonymous users.
*/
function drupal_valid_token($token, $value = '', $skip_anonymous = FALSE) {
global $user;
return (($skip_anonymous && $user->uid == 0) || ($token == drupal_get_token($value)));
}
function _drupal_bootstrap_full() {
$called = &drupal_static(__FUNCTION__);
if ($called) {
return;
}
$called = 1;
require_once DRUPAL_ROOT . '/' . variable_get('path_inc', 'includes/path.inc');
require_once DRUPAL_ROOT . '/includes/theme.inc';
require_once DRUPAL_ROOT . '/includes/pager.inc';
require_once DRUPAL_ROOT . '/' . variable_get('menu_inc', '/includes/menu.inc');
require_once DRUPAL_ROOT . '/includes/tablesort.inc';
require_once DRUPAL_ROOT . '/includes/file.inc';
require_once DRUPAL_ROOT . '/includes/unicode.inc';
require_once DRUPAL_ROOT . '/includes/image.inc';
require_once DRUPAL_ROOT . '/includes/form.inc';
require_once DRUPAL_ROOT . '/includes/mail.inc';
require_once DRUPAL_ROOT . '/includes/actions.inc';
require_once DRUPAL_ROOT . '/includes/ajax.inc';
require_once DRUPAL_ROOT . '/includes/token.inc';
require_once DRUPAL_ROOT . '/includes/errors.inc';
// Detect string handling method
unicode_check();
// Undo magic quotes
fix_gpc_magic();
// Load all enabled modules
module_load_all();
// Make sure all stream wrappers are registered.
file_get_stream_wrappers();
if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'simpletest') !== FALSE) {
// Valid SimpleTest user-agent, log fatal errors to test specific file
// directory. The user-agent is validated in DRUPAL_BOOTSTRAP_DATABASE
// phase so as long as it is a SimpleTest user-agent it is valid.
ini_set('log_errors', 1);
ini_set('error_log', file_directory_path() . '/error.log');
}
// Initialize $_GET['q'] prior to invoking hook_init().
drupal_path_initialize();
// Set a custom theme for the current page, if there is one. We need to run
// this before invoking hook_init(), since any modules which initialize the
// theme system will prevent a custom theme from being correctly set later.
menu_set_custom_theme();
// Let all modules take action before menu system handles the request
// We do not want this while running update.php.
if (!defined('MAINTENANCE_MODE') || MAINTENANCE_MODE != 'update') {
module_invoke_all('init');
}
}
/**
* Store the current page in the cache.
*
* If page_compression is enabled, a gzipped version of the page is stored in
* the cache to avoid compressing the output on each request. The cache entry
* is unzipped in the relatively rare event that the page is requested by a
* client without gzip support.
*
* Page compression requires the PHP zlib extension
* (http://php.net/manual/en/ref.zlib.php).
*
* @see drupal_page_header()
*/
function drupal_page_set_cache() {
global $base_root;
if (drupal_page_is_cacheable()) {
$cache = (object) array(
'cid' => $base_root . request_uri(),
'data' => ob_get_clean(),
'expire' => CACHE_TEMPORARY,
'created' => REQUEST_TIME,
'headers' => array(),
);
// Restore preferred header names based on the lower-case names returned
// by drupal_get_http_header().
$header_names = _drupal_set_preferred_header_name();
foreach (drupal_get_http_header() as $name_lower => $value) {
$cache->headers[$header_names[$name_lower]] = $value;
if ($name_lower == 'expires') {
// Use the actual timestamp from an Expires header if available.
$cache->expire = strtotime($value);
}
}
if ($cache->data) {
if (variable_get('page_compression', TRUE) && extension_loaded('zlib')) {
$cache->data = gzencode($cache->data, 9, FORCE_GZIP);
}
cache_set($cache->cid, $cache->data, 'cache_page', $cache->expire, $cache->headers);
}
return $cache;
}
}
/**
* Executes a cron run when called.
*
* Do not call this function from test, use $this->cronRun() instead.
*
* @return
* Returns TRUE if ran successfully
*/
function drupal_cron_run() {
// Allow execution to continue even if the request gets canceled.
@ignore_user_abort(TRUE);
// Prevent session information from being saved while cron is running.
drupal_save_session(FALSE);
// Force the current user to anonymous to ensure consistent permissions on
// cron runs.
$original_user = $GLOBALS['user'];
$GLOBALS['user'] = drupal_anonymous_user();
// Try to allocate enough time to run all the hook_cron implementations.
drupal_set_time_limit(240);
// Fetch the cron semaphore
$semaphore = variable_get('cron_semaphore', FALSE);
$return = FALSE;
// Grab the defined cron queues.
$queues = module_invoke_all('cron_queue_info');
drupal_alter('cron_queue_info', $queues);
if ($semaphore) {
if (REQUEST_TIME - $semaphore > 3600) {
// Either cron has been running for more than an hour or the semaphore
// was not reset due to a database error.
watchdog('cron', 'Cron has been running for more than an hour and is most likely stuck.', array(), WATCHDOG_ERROR);
// Release cron semaphore
variable_del('cron_semaphore');
}
else {
// Cron is still running normally.
watchdog('cron', 'Attempting to re-run cron while it is already running.', array(), WATCHDOG_WARNING);
}
}
else {
// Make sure every queue exists. There is no harm in trying to recreate an
// existing queue.
foreach ($queues as $queue_name => $info) {
DrupalQueue::get($queue_name)->createQueue();
}
// Register shutdown callback
drupal_register_shutdown_function('drupal_cron_cleanup');
// Lock cron semaphore
variable_set('cron_semaphore', REQUEST_TIME);
// Iterate through the modules calling their cron handlers (if any):
module_invoke_all('cron');
// Record cron time
variable_set('cron_last', REQUEST_TIME);
watchdog('cron', 'Cron run completed.', array(), WATCHDOG_NOTICE);
// Release cron semaphore
variable_del('cron_semaphore');
// Return TRUE so other functions can check if it did run successfully
$return = TRUE;
}
foreach ($queues as $queue_name => $info) {
$function = $info['worker callback'];
$end = time() + (isset($info['time']) ? $info['time'] : 15);
$queue = DrupalQueue::get($queue_name);
while (time() < $end && ($item = $queue->claimItem())) {
$function($item->data);
$queue->deleteItem($item);
}
}
// Restore the user.
$GLOBALS['user'] = $original_user;
drupal_save_session(TRUE);
return $return;
}
/**
* Shutdown function for cron cleanup.
*/
function drupal_cron_cleanup() {
// See if the semaphore is still locked.
if (variable_get('cron_semaphore', FALSE)) {
watchdog('cron', 'Cron run exceeded the time limit and was aborted.', array(), WATCHDOG_WARNING);
// Release cron semaphore
variable_del('cron_semaphore');
}
}
/**
* Return an array of system file objects.
*
* Returns an array of file objects of the given type from the site-wide
* directory (i.e. modules/), the all-sites directory (i.e. sites/all/modules/),
* the profiles directory (i.e. profiles/your_site_profile/modules/), and the
* site-specific directory (i.e. sites/your_site_dir/modules/). The returned
* array will be keyed using the key specified (uri, filename, or name). Using
* name or filename will cause site-specific files to be prioritized over
* similar files in the default directories. That is, if a file with the same
* name appears in both the site-wide directory and site-specific directory,
* only the site-specific version will be included.
*
* @param $mask
* The preg_match() regular expression of the files to find.
* @param $directory
* The subdirectory name in which the files are found. For example,
* 'modules' will search in both modules/ and
* sites/somesite/modules/.
* @param $key
* The key to be passed to file_scan_directory().
* @param $min_depth
* Minimum depth of directories to return files from.
*
* @return
* An array of file objects of the specified type.
*/
function drupal_system_listing($mask, $directory, $key = 'name', $min_depth = 1) {
$config = conf_path();
$profile = drupal_get_profile();
$searchdir = array($directory);
$files = array();
// The 'profiles' directory contains pristine collections of modules and
// themes as organized by a distribution. It is pristine in the same way
// that /modules is pristine for core; users should avoid changing anything
// there in favor of sites/all or sites/<domain> directories.
if (file_exists("profiles/$profile/$directory")) {
$searchdir[] = "profiles/$profile/$directory";
}
// Always search sites/all/* as well as the global directories
$searchdir[] = 'sites/all/' . $directory;
if (file_exists("$config/$directory")) {
$searchdir[] = "$config/$directory";
}
// Get current list of items
if (!function_exists('file_scan_directory')) {
require_once DRUPAL_ROOT . '/includes/file.inc';
}
foreach ($searchdir as $dir) {
$files = array_merge($files, file_scan_directory($dir, $mask, array('key' => $key, 'min_depth' => $min_depth)));
}
return $files;
}
/**
* Hands off alterable variables to type-specific *_alter implementations.
*
* This dispatch function hands off the passed in variables to type-specific
* hook_TYPE_alter() implementations in modules. It ensures a consistent
* interface for all altering operations.
*
* A maximum of 2 alterable arguments is supported. In case more arguments need
* to be passed and alterable, modules provide additional variables assigned by
* reference in the last $context argument:
* @code
* $context = array(
* 'alterable' => &$alterable,
* 'unalterable' => $unalterable,
* 'foo' => 'bar',
* );
* drupal_alter('mymodule_data', $alterable1, $alterable2, $context);
* @endcode
*
* Note that objects are always passed by reference in PHP5. If it is absolutely
* required that no implementation alters a passed object in $context, then an
* object needs to be cloned:
* @code
* $context = array(
* 'unalterable_object' => clone $object,
* );
* drupal_alter('mymodule_data', $data, $context);
* @endcode
*
* @param $type
* A string describing the data type of the alterable $data. 'form', 'links',
* 'node_content', and so on are several examples.
* @param &$data
* The primary data to be altered.
* @param &$context1
* (optional) An additional variable that is passed by reference.
* @param &$context2
* (optional) An additional variable that is passed by reference. If more
* context needs to be provided to implementations, then this should be an
* keyed array as described above.
*/
function drupal_alter($type, &$data, &$context1 = NULL, &$context2 = NULL) {
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['functions'] = &drupal_static(__FUNCTION__);
}
$functions = &$drupal_static_fast['functions'];
// Some alter hooks are invoked many times per page request, so statically
// cache the list of functions to call, and on subsequent calls, iterate
// through them quickly.
if (!isset($functions[$type])) {
$functions[$type] = array();
$hook = $type . '_alter';
foreach (module_implements($hook) as $module) {
$functions[$type][] = $module . '_' . $hook;
}
// Allow the theme to alter variables after the theme system has been
// initialized.
global $theme, $base_theme_info;
if (isset($theme)) {
$theme_keys = array();
foreach ($base_theme_info as $base) {
$theme_keys[] = $base->name;
}
$theme_keys[] = $theme;
foreach ($theme_keys as $theme_key) {
$function = $theme_key . '_' . $hook;
if (function_exists($function)) {
$functions[$type][] = $function;
}
}
}
}
foreach ($functions[$type] as $function) {
$function($data, $context1, $context2);
}
}
/**
* Set the main page content value for later use.
*
* Given the nature of the Drupal page handling, this will be called once with
* a string or array. We store that and return it later as the block is being
* displayed.
*
* @param $content
* A string or renderable array representing the body of the page.
* @return
* If called without $content, a renderable array representing the body of
* the page.
*/
function drupal_set_page_content($content = NULL) {
$content_block = &drupal_static(__FUNCTION__, NULL);
$main_content_display = &drupal_static('system_main_content_added', FALSE);
if (!empty($content)) {
$content_block = (is_array($content) ? $content : array('main' => array('#markup' => $content)));
}
else {
// Indicate that the main content has been requested. We assume that
// the module requesting the content will be adding it to the page.
// A module can indicate that it does not handle the content by setting
// the static variable back to FALSE after calling this function.
$main_content_display = TRUE;
return $content_block;
}
}
/**
* #pre_render callback to render #browsers into #prefix and #suffix.
*
* @param $elements
* A render array with a '#browsers' property. The '#browsers' property can
* contain any or all of the following keys:
* - 'IE': If FALSE, the element is not rendered by Internet Explorer. If
* TRUE, the element is rendered by Internet Explorer. Can also be a string
* containing an expression for Internet Explorer to evaluate as part of a
* conditional comment. For example, this can be set to 'lt IE 7' for the
* element to be rendered in Internet Explorer 6, but not in Internet
* Explorer 7 or higher. Defaults to TRUE.
* - '!IE': If FALSE, the element is not rendered by browsers other than
* Internet Explorer. If TRUE, the element is rendered by those browsers.
* Defaults to TRUE.
* Examples:
* - To render an element in all browsers, '#browsers' can be left out or set
* to array('IE' => TRUE, '!IE' => TRUE).
* - To render an element in Internet Explorer only, '#browsers' can be set
* to array('!IE' => FALSE).
* - To render an element in Internet Explorer 6 only, '#browsers' can be set
* to array('IE' => 'lt IE 7', '!IE' => FALSE).
* - To render an element in Internet Explorer 8 and higher and in all other
* browsers, '#browsers' can be set to array('IE' => 'gte IE 8').
*
* @return
* The passed in element with markup for conditional comments potentially
* added to '#prefix' and '#suffix'.
*/
function drupal_pre_render_conditional_comments($elements) {
$browsers = isset($elements['#browsers']) ? $elements['#browsers'] : array();
$browsers += array(
'IE' => TRUE,
'!IE' => TRUE,
);
// If rendering in all browsers, no need for conditional comments.
if ($browsers['IE'] === TRUE && $browsers['!IE']) {
return $elements;
}
// Determine the conditional comment expression for Internet Explorer to
// evaluate.
if ($browsers['IE'] === TRUE) {
$expression = 'IE';
}
elseif ($browsers['IE'] === FALSE) {
$expression = '!IE';
}
else {
$expression = $browsers['IE'];
}
// Wrap the element's potentially existing #prefix and #suffix properties with
// conditional comment markup. The conditional comment expression is evaluated
// by Internet Explorer only. To control the rendering by other browsers,
// either the "downlevel-hidden" or "downlevel-revealed" technique must be
// used. See http://en.wikipedia.org/wiki/Conditional_comment for details.
$elements += array(
'#prefix' => '',
'#suffix' => '',
);
if (!$browsers['!IE']) {
// "downlevel-hidden".
$elements['#prefix'] = "\n<!--[if $expression]>\n" . $elements['#prefix'];
$elements['#suffix'] .= "<![endif]-->\n";
}
else {
// "downlevel-revealed".
$elements['#prefix'] = "\n<!--[if $expression]><!-->\n" . $elements['#prefix'];
$elements['#suffix'] .= "<!--<![endif]-->\n";
}
return $elements;
}
/**
* #pre_render callback to render a link into #markup.
*
* Doing so during pre_render gives modules a chance to alter the link parts.
*
* @param $elements
* A structured array whose keys form the arguments to l():
* - #title: The link text to pass as argument to l().
* - #href: The URL path component to pass as argument to l().
* - #options: (optional) An array of options to pass to l().
*
* @return
* The passed in elements containing a rendered link in '#markup'.
*/
function drupal_pre_render_link($elements) {
$options = isset($elements['#options']) ? $elements['#options'] : array();
$elements['#markup'] = l($elements['#title'], $elements['#href'], $options);
return $elements;
}
/**
* #pre_render callback to append contents in #markup to #children.
*
* This needs to be a #pre_render callback, because eventually assigned
* #theme_wrappers will expect the element's rendered content in #children.
* Note that if also a #theme is defined for the element, then the result of
* the theme callback will override #children.
*
* @see drupal_render()
*
* @param $elements
* A structured array using the #markup key.
*
* @return
* The passed in elements, but #markup appended to #children.
*/
function drupal_pre_render_markup($elements) {
$elements['#children'] = $elements['#markup'];
return $elements;
}
/**
* Renders the page, including all theming.
*
* @param $page
* A string or array representing the content of a page. The array consists of
* the following keys:
* - #type: Value is always 'page'. This pushes the theming through page.tpl.php (required).
* - #show_messages: Suppress drupal_get_message() items. Used by Batch API (optional).
*
* @see hook_page_alter()
* @see element_info('page')
*/
function drupal_render_page($page) {
$main_content_display = &drupal_static('system_main_content_added', FALSE);
// Allow menu callbacks to return strings or arbitrary arrays to render.
// If the array returned is not of #type page directly, we need to fill
// in the page with defaults.
if (is_string($page) || (is_array($page) && (!isset($page['#type']) || ($page['#type'] != 'page')))) {
drupal_set_page_content($page);
$page = element_info('page');
}
// Modules can add elements to $page as needed in hook_page_build().
foreach (module_implements('page_build') as $module) {
$function = $module . '_page_build';
$function($page);
}
// Modules alter the $page as needed. Blocks are populated into regions like
// 'sidebar_first', 'footer', etc.
drupal_alter('page', $page);
// If no module has taken care of the main content, add it to the page now.
// This allows the site to still be usable even if no modules that
// control page regions (for example, the Block module) are enabled.
if (!$main_content_display) {
$page['content']['system_main'] = drupal_set_page_content();
}
return drupal_render($page);
}
/**
* Renders HTML given a structured array tree.
*
* Recursively iterates over each of the array elements, generating HTML code.
*
* HTML generation is controlled by two properties containing theme functions,
* #theme and #theme_wrappers.
*
* #theme is the theme function called first. If it is set and the element has
* any children, they have to be rendered there. For elements that are not
* allowed to have any children, e.g. buttons or textfields, it can be used to
* render the element itself. If #theme is not present and the element has
* children, they are rendered and concatenated into a string by
* drupal_render_children().
*
* The #theme_wrappers property contains an array of theme functions which will
* be called, in order, after #theme has run. These can be used to add further
* markup around the rendered children; e.g., fieldsets add the required markup
* for a fieldset around their rendered child elements. All wrapper theme
* functions have to include the element's #children property in their output,
* as it contains the output of the previous theme functions and the rendered
* children.
*
* For example, for the form element type, by default only the #theme_wrappers
* property is set, which adds the form markup around the rendered child
* elements of the form. This allows you to set the #theme property on a
* specific form to a custom theme function, giving you complete control over
* the placement of the form's children while not at all having to deal with
* the form markup itself.
*
* drupal_render() can optionally cache the rendered output of elements to
* improve performance. To use drupal_render() caching, set the element's #cache
* property to an associative array with one or several of the following keys:
* - 'keys': An array of one or more keys that identify the element. If 'keys'
* is set, the cache ID is created automatically from these keys.
* @see drupal_render_cid_create()
* - 'granularity' (optional): Define the cache granularity using binary
* combinations of the cache granularity constants, e.g. DRUPAL_CACHE_PER_USER
* to cache for each user separately or
* DRUPAL_CACHE_PER_PAGE | DRUPAL_CACHE_PER_ROLE to cache separately for each
* page and role. If not specified the element is cached globally for each
* theme and language.
* - 'cid': Specify the cache ID directly. Either 'keys' or 'cid' is required.
* If 'cid' is set, 'keys' and 'granularity' are ignored. Use only if you
* have special requirements.
* - 'expire': Set to one of the cache lifetime constants.
* - 'bin': Specify a cache bin to cache the element in. Defaults to 'cache'.
*
* This function is usually called from within another function, like
* drupal_get_form() or a theme function. Elements are sorted internally
* using uasort(). Since this is expensive, when passing already sorted
* elements to drupal_render(), for example from a database query, set
* $elements['#sorted'] = TRUE to avoid sorting them a second time.
*
* @param $elements
* The structured array describing the data to be rendered.
* @return
* The rendered HTML.
*/
function drupal_render(&$elements) {
// Early-return nothing if user does not have access.
if (empty($elements) || (isset($elements['#access']) && !$elements['#access'])) {
return;
}
// Do not print elements twice.
if (!empty($elements['#printed'])) {
return;
}
// Try to fetch the element's markup from cache and return.
if (isset($elements['#cache']) && $cached_output = drupal_render_cache_get($elements)) {
return $cached_output;
}
// If #markup is not empty, set #type. This allows to specify just #markup on
// an element without setting #type.
if (!empty($elements['#markup']) && !isset($elements['#type'])) {
$elements['#type'] = 'markup';
}
// If the default values for this element have not been loaded yet, populate
// them.
if (isset($elements['#type']) && empty($elements['#defaults_loaded'])) {
$elements += element_info($elements['#type']);
}
// Make any final changes to the element before it is rendered. This means
// that the $element or the children can be altered or corrected before the
// element is rendered into the final text.
if (isset($elements['#pre_render'])) {
foreach ($elements['#pre_render'] as $function) {
if (function_exists($function)) {
$elements = $function($elements);
}
}
}
// Allow #pre_render to abort rendering.
if (!empty($elements['#printed'])) {
return;
}
// Get the children of the element, sorted by weight.
$children = element_children($elements, TRUE);
// Initialize this element's #children, unless a #pre_render callback already
// preset #children.
if (!isset($elements['#children'])) {
$elements['#children'] = '';
}
// Call the element's #theme function if it is set. Then any children of the
// element have to be rendered there.
if (isset($elements['#theme'])) {
$elements['#children'] = theme($elements['#theme'], $elements);
}
// If #theme was not set and the element has children, render them now.
// This is the same process as drupal_render_children() but is inlined
// for speed.
if ($elements['#children'] == '') {
foreach ($children as $key) {
$elements['#children'] .= drupal_render($elements[$key]);
}
}
// Let the theme functions in #theme_wrappers add markup around the rendered
// children.
if (isset($elements['#theme_wrappers'])) {
foreach ($elements['#theme_wrappers'] as $theme_wrapper) {
$elements['#children'] = theme($theme_wrapper, $elements);
}
}
// Filter the outputted content and make any last changes before the
// content is sent to the browser. The changes are made on $content
// which allows the output'ed text to be filtered.
if (isset($elements['#post_render'])) {
foreach ($elements['#post_render'] as $function) {
if (function_exists($function)) {
$elements['#children'] = $function($elements['#children'], $elements);
}
}
}
// Add any JavaScript state information associated with the element.
if (!empty($elements['#states'])) {
drupal_process_states($elements);
}
// Add additional libraries, CSS, JavaScript an other custom
// attached data associated with this element.
if (!empty($elements['#attached'])) {
drupal_process_attached($elements);
}
$prefix = isset($elements['#prefix']) ? $elements['#prefix'] : '';
$suffix = isset($elements['#suffix']) ? $elements['#suffix'] : '';
$output = $prefix . $elements['#children'] . $suffix;
// Cache the processed element if #cache is set.
if (isset($elements['#cache'])) {
drupal_render_cache_set($output, $elements);
}
$elements['#printed'] = TRUE;
return $output;
}
/**
* Render children of an element and concatenate them.
*
* This renders all children of an element using drupal_render() and then
* joins them together into a single string.
*
* @param $element
* The structured array whose children shall be rendered.
* @param $children_keys
* If the keys of the element's children are already known, they can be passed
* in to save another run of element_children().
*/
function drupal_render_children(&$element, $children_keys = NULL) {
if ($children_keys === NULL) {
$children_keys = element_children($element);
}
$output = '';
foreach ($children_keys as $key) {
if (!empty($element[$key])) {
$output .= drupal_render($element[$key]);
}
}
return $output;
}
/**
* Render and print an element.
*
* This function renders an element using drupal_render(). The top level
* element is always rendered even if hide() had been previously used on it.
*
* Any nested elements are only rendered if they haven't been rendered before
* or if they have been re-enabled with show().
*
* @see drupal_render()
* @see show()
* @see hide()
*/
function render(&$element) {
if (is_array($element)) {
show($element);
return drupal_render($element);
}
else {
// Safe-guard for inappropriate use of render() on flat variables: return
// the variable as-is.
return $element;
}
}
/**
* Hide an element from later rendering.
*
* @see render()
* @see show()
*/
function hide(&$element) {
$element['#printed'] = TRUE;
return $element;
}
/**
* Show a hidden or already printed element from later rendering.
*
* Alternatively, render($element) could be used which automatically shows the
* element while rendering it.
*
* @see render()
* @see hide()
*/
function show(&$element) {
$element['#printed'] = FALSE;
return $element;
}
/**
* Get the rendered output of a renderable element from cache.
*
* @see drupal_render()
* @see drupal_render_cache_set()
*
* @param $elements
* A renderable array.
* @return
* A markup string containing the rendered content of the element, or FALSE
* if no cached copy of the element is available.
*/
function drupal_render_cache_get($elements) {
if (!in_array($_SERVER['REQUEST_METHOD'], array('GET', 'HEAD')) || !$cid = drupal_render_cid_create($elements)) {
return FALSE;
}
$bin = isset($elements['#cache']['bin']) ? $elements['#cache']['bin'] : 'cache';
if (!empty($cid) && $cache = cache_get($cid, $bin)) {
// Add additional libraries, JavaScript, CSS and other data attached
// to this element.
if (isset($cache->data['#attached'])) {
drupal_process_attached($cache->data);
}
// Return the rendered output.
return $cache->data['#markup'];
}
return FALSE;
}
/**
* Cache the rendered output of a renderable element.
*
* This is called by drupal_render() if the #cache property is set on an element.
*
* @see drupal_render()
* @see drupal_render_cache_get()
*
* @param $markup
* The rendered output string of $elements.
* @param $elements
* A renderable array.
*/
function drupal_render_cache_set(&$markup, $elements) {
// Create the cache ID for the element.
if (!in_array($_SERVER['REQUEST_METHOD'], array('GET', 'HEAD')) || !$cid = drupal_render_cid_create($elements)) {
return FALSE;
}
// Cache implementations are allowed to modify the markup, to support
// replacing markup with edge-side include commands. The supporting cache
// backend will store the markup in some other key (like
// $data['#real-value']) and return an include command instead. When the
// ESI command is executed by the content accelerator, the real value can
// be retrieved and used.
$data['#markup'] = &$markup;
// Persist attached data associated with this element.
if (isset($elements['#attached'])) {
$data['#attached'] = $elements['#attached'];
}
$bin = isset($elements['#cache']['bin']) ? $elements['#cache']['bin'] : 'cache';
$expire = isset($elements['#cache']['expire']) ? $elements['#cache']['expire'] : CACHE_PERMANENT;
cache_set($cid, $data, $bin, $expire);
}
/**
* Prepare an element for caching based on a query. This smart caching strategy
* saves Drupal from querying and rendering to HTML when the underlying query is
* unchanged.
*
* Expensive queries should use the query builder to create the query and then
* call this function. Executing the query and formatting results should happen
* in a #pre_render callback.
*
* @param $query
* A select query object as returned by db_select().
* @param $function
* The name of the function doing this caching. A _pre_render suffix will be
* added to this string and is also part of the cache key in
* drupal_render_cache_set() and drupal_render_cache_get().
* @param $expire
* The cache expire time, passed eventually to cache_set().
* @param $granularity
* One or more granularity constants passed to drupal_render_cid_parts().
*
* @return
* A renderable array with the following keys and values:
* - #query: The passed in $query.
* - #pre_render: $function with a _pre_render suffix.
* - #cache: An associative array prepared for drupal_render_cache_set().
*/
function drupal_render_cache_by_query($query, $function, $expire = CACHE_TEMPORARY, $granularity = NULL) {
$cache_keys = array_merge(array($function), drupal_render_cid_parts($granularity));
$query->preExecute();
$cache_keys[] = md5(serialize(array((string) $query, $query->getArguments())));
return array(
'#query' => $query,
'#pre_render' => array($function . '_pre_render'),
'#cache' => array(
'keys' => $cache_keys,
'expire' => $expire,
),
);
}
/**
/**
* Helper function for building cache ids.
*
* @param $granularity
* One or more cache granularity constants, e.g. DRUPAL_CACHE_PER_USER to cache
* for each user separately or DRUPAL_CACHE_PER_PAGE | DRUPAL_CACHE_PER_ROLE to
* cache separately for each page and role.
*
* @return
* An array of cache ID parts, always containing the active theme. If the
* locale module is enabled it also contains the active language. If
* $granularity was passed in, more parts are added.
*/
function drupal_render_cid_parts($granularity = NULL) {
global $theme, $base_root, $user;
$cid_parts[] = $theme;
if (module_exists('locale')) {
global $language;
$cid_parts[] = $language->language;
}
if (!empty($granularity)) {
// 'PER_ROLE' and 'PER_USER' are mutually exclusive. 'PER_USER' can be a
// resource drag for sites with many users, so when a module is being
// equivocal, we favor the less expensive 'PER_ROLE' pattern.
if ($granularity & DRUPAL_CACHE_PER_ROLE) {
$cid_parts[] = 'r.' . implode(',', array_keys($user->roles));
}
elseif ($granularity & DRUPAL_CACHE_PER_USER) {
$cid_parts[] = "u.$user->uid";
}
if ($granularity & DRUPAL_CACHE_PER_PAGE) {
$cid_parts[] = $base_root . request_uri();
}
}
return $cid_parts;
}
/**
* Create the cache ID for a renderable element.
*
* This creates the cache ID string, either by returning the #cache['cid']
* property if present or by building the cache ID out of the #cache['keys']
* and, optionally, the #cache['granularity'] properties.
*
* @param $elements
* A renderable array.
*
* @return
* The cache ID string, or FALSE if the element may not be cached.
*/
function drupal_render_cid_create($elements) {
if (isset($elements['#cache']['cid'])) {
return $elements['#cache']['cid'];
}
elseif (isset($elements['#cache']['keys'])) {
$granularity = isset($elements['#cache']['granularity']) ? $elements['#cache']['granularity'] : NULL;
// Merge in additional cache ID parts based provided by drupal_render_cid_parts().
$cid_parts = array_merge($elements['#cache']['keys'], drupal_render_cid_parts($granularity));
return implode(':', $cid_parts);
}
return FALSE;
}
/**
* Function used by uasort to sort structured arrays by weight.
*/
function element_sort($a, $b) {
$a_weight = (is_array($a) && isset($a['#weight'])) ? $a['#weight'] : 0;
$b_weight = (is_array($b) && isset($b['#weight'])) ? $b['#weight'] : 0;
if ($a_weight == $b_weight) {
return 0;
}
return ($a_weight < $b_weight) ? -1 : 1;
}
/**
* Retrieve the default properties for the defined element type.
*/
function element_info($type) {
$cache = &drupal_static(__FUNCTION__);
if (!isset($cache)) {
$cache = module_invoke_all('element_info');
foreach ($cache as $element_type => $info) {
$cache[$element_type]['#type'] = $element_type;
}
// Allow modules to alter the element type defaults.
drupal_alter('element_info', $cache);
}
return isset($cache[$type]) ? $cache[$type] : array();
}
/**
* Function used by uasort to sort structured arrays by weight, without the property weight prefix.
*/
function drupal_sort_weight($a, $b) {
$a_weight = (is_array($a) && isset($a['weight'])) ? $a['weight'] : 0;
$b_weight = (is_array($b) && isset($b['weight'])) ? $b['weight'] : 0;
if ($a_weight == $b_weight) {
return 0;
}
return ($a_weight < $b_weight) ? -1 : 1;
}
/**
* Check if the key is a property.
*/
function element_property($key) {
return $key[0] == '#';
}
/**
* Get properties of a structured array element. Properties begin with '#'.
*/
function element_properties($element) {
return array_filter(array_keys((array) $element), 'element_property');
}
/**
* Check if the key is a child.
*/
function element_child($key) {
return !isset($key[0]) || $key[0] != '#';
}
/**
* Return the children of an element, optionally sorted by weight.
*
* @param $elements
* The element to be sorted.
* @param $sort
* Boolean to indicate whether the children should be sorted by weight.
* @return
* The array keys of the element's children.
*/
function element_children(&$elements, $sort = FALSE) {
// Do not attempt to sort elements which have already been sorted.
$sort = isset($elements['#sorted']) ? !$elements['#sorted'] : $sort;
// Filter out properties from the element, leaving only children.
$children = array();
$sortable = FALSE;
foreach ($elements as $key => $value) {
if ($key[0] !== '#') {
$children[$key] = $value;
if (is_array($value) && isset($value['#weight'])) {
$sortable = TRUE;
}
}
}
// Sort the children if necessary.
if ($sort && $sortable) {
uasort($children, 'element_sort');
// Put the sorted children back into $elements in the correct order, to
// preserve sorting if the same element is passed through
// element_children() twice.
foreach ($children as $key => $child) {
unset($elements[$key]);
$elements[$key] = $child;
}
$elements['#sorted'] = TRUE;
}
return array_keys($children);
}
/**
* Return the visibile children of an element.
*
* @param $elements
* The parent element.
* @return
* The array keys of the element's visible children.
*/
function element_get_visible_children(array $elements) {
$visible_children = array();
foreach (element_children($elements) as $key) {
$child = $elements[$key];
// Skip un-accessible children.
if (isset($child['#access']) && !$child['#access']) {
continue;
}
// Skip value and hidden elements, since they are not rendered.
if (isset($child['#type']) && in_array($child['#type'], array('value', 'hidden'))) {
continue;
}
$visible_children[$key] = $child;
}
return array_keys($visible_children);
}
/**
* Provide theme registration for themes across .inc files.
*/
function drupal_common_theme() {
return array(
// theme.inc
'placeholder' => array(
'variables' => array('text' => NULL)
),
'html' => array(
'render element' => 'page',
'template' => 'html',
),
'page' => array(
'render element' => 'page',
'template' => 'page',
),
'region' => array(
'render element' => 'elements',
'template' => 'region',
),
'status_messages' => array(
'variables' => array('display' => NULL),
),
'link' => array(
'variables' => array('text' => NULL, 'path' => NULL, 'options' => array()),
),
'links' => array(
'variables' => array('links' => NULL, 'attributes' => array('class' => array('links')), 'heading' => array()),
),
'image' => array(
'variables' => array('path' => NULL, 'alt' => '', 'title' => '', 'attributes' => array(), 'getsize' => TRUE),
),
'breadcrumb' => array(
'variables' => array('breadcrumb' => NULL),
),
'help' => array(
'variables' => array(),
),
'table' => array(
'variables' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL, 'colgroups' => array(), 'sticky' => TRUE, 'empty' => ''),
),
'table_select_header_cell' => array(
'variables' => array(),
),
'tablesort_indicator' => array(
'variables' => array('style' => NULL),
),
'mark' => array(
'variables' => array('type' => MARK_NEW),
),
'item_list' => array(
'variables' => array('items' => array(), 'title' => NULL, 'type' => 'ul', 'attributes' => array()),
),
'more_help_link' => array(
'variables' => array('url' => NULL),
),
'feed_icon' => array(
'variables' => array('url' => NULL, 'title' => NULL),
),
'more_link' => array(
'variables' => array('url' => NULL, 'title' => NULL)
),
'username' => array(
'variables' => array('account' => NULL),
),
'progress_bar' => array(
'variables' => array('percent' => NULL, 'message' => NULL),
),
'indentation' => array(
'variables' => array('size' => 1),
),
'html_tag' => array(
'render element' => 'element',
),
// from theme.maintenance.inc
'maintenance_page' => array(
'variables' => array('content' => NULL, 'show_messages' => TRUE),
'template' => 'maintenance-page',
),
'update_page' => array(
'variables' => array('content' => NULL, 'show_messages' => TRUE),
),
'install_page' => array(
'variables' => array('content' => NULL),
),
'task_list' => array(
'variables' => array('items' => NULL, 'active' => NULL),
),
'authorize_message' => array(
'variables' => array('message' => NULL, 'success' => TRUE),
),
'authorize_report' => array(
'variables' => array('messages' => array()),
),
// from pager.inc
'pager' => array(
'variables' => array('tags' => array(), 'element' => 0, 'parameters' => array(), 'quantity' => 9),
),
'pager_first' => array(
'variables' => array('text' => NULL, 'element' => 0, 'parameters' => array()),
),
'pager_previous' => array(
'variables' => array('text' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_next' => array(
'variables' => array('text' => NULL, 'element' => 0, 'interval' => 1, 'parameters' => array()),
),
'pager_last' => array(
'variables' => array('text' => NULL, 'element' => 0, 'parameters' => array()),
),
'pager_link' => array(
'variables' => array('text' => NULL, 'page_new' => NULL, 'element' => NULL, 'parameters' => array(), 'attributes' => array()),
),
// from locale.inc
'locale_admin_manage_screen' => array(
'render element' => 'form',
),
// from menu.inc
'menu_link' => array(
'render element' => 'element',
),
'menu_tree' => array(
'render element' => 'tree',
),
'menu_local_task' => array(
'render element' => 'element',
),
'menu_local_action' => array(
'render element' => 'element',
),
'menu_local_tasks' => array(
'variables' => array(),
),
// from form.inc
'select' => array(
'render element' => 'element',
),
'fieldset' => array(
'render element' => 'element',
),
'radio' => array(
'render element' => 'element',
),
'radios' => array(
'render element' => 'element',
),
'date' => array(
'render element' => 'element',
),
'checkbox' => array(
'render element' => 'element',
),
'checkboxes' => array(
'render element' => 'element',
),
'button' => array(
'render element' => 'element',
),
'image_button' => array(
'render element' => 'element',
),
'hidden' => array(
'render element' => 'element',
),
'textfield' => array(
'render element' => 'element',
),
'form' => array(
'render element' => 'element',
),
'textarea' => array(
'render element' => 'element',
),
'password' => array(
'render element' => 'element',
),
'file' => array(
'render element' => 'element',
),
'tableselect' => array(
'render element' => 'element',
),
'form_element' => array(
'render element' => 'element',
),
'form_required_marker' => array(
'arguments' => array('element' => NULL),
),
'form_element_label' => array(
'render element' => 'element',
),
'vertical_tabs' => array(
'render element' => 'element',
),
'container' => array(
'render element' => 'element',
),
);
}
/**
* @ingroup schemaapi
* @{
*/
/**
* Creates all tables in a module's hook_schema() implementation.
*
* Note: This function does not pass the module's schema through
* hook_schema_alter(). The module's tables will be created exactly as the
* module defines them.
*
* @param $module
* The module for which the tables will be created.
*/
function drupal_install_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_schema_initialize($module, $schema);
foreach ($schema as $name => $table) {
db_create_table($name, $table);
}
}
/**
* Remove all tables that a module defines in its hook_schema().
*
* Note: This function does not pass the module's schema through
* hook_schema_alter(). The module's tables will be created exactly as the
* module defines them.
*
* @param $module
* The module for which the tables will be removed.
* @return
* An array of arrays with the following key/value pairs:
* - success: a boolean indicating whether the query succeeded.
* - query: the SQL query(s) executed, passed through check_plain().
*/
function drupal_uninstall_schema($module) {
$schema = drupal_get_schema_unprocessed($module);
_drupal_schema_initialize($module, $schema);
foreach ($schema as $table) {
if (db_table_exists($table['name'])) {
db_drop_table($table['name']);
}
}
}
/**
* Returns the unprocessed and unaltered version of a module's schema.
*
* Use this function only if you explicitly need the original
* specification of a schema, as it was defined in a module's
* hook_schema(). No additional default values will be set,
* hook_schema_alter() is not invoked and these unprocessed
* definitions won't be cached.
*
* This function can be used to retrieve a schema specification in
* hook_schema(), so it allows you to derive your tables from existing
* specifications.
*
* It is also used by drupal_install_schema() and
* drupal_uninstall_schema() to ensure that a module's tables are
* created exactly as specified without any changes introduced by a
* module that implements hook_schema_alter().
*
* @param $module
* The module to which the table belongs.
* @param $table
* The name of the table. If not given, the module's complete schema
* is returned.
*/
function drupal_get_schema_unprocessed($module, $table = NULL) {
// Load the .install file to get hook_schema.
module_load_install($module);
$schema = module_invoke($module, 'schema');
if (!is_null($table) && isset($schema[$table])) {
return $schema[$table];
}
else if (!empty($schema)) {
return $schema;
}
return array();
}
/**
* Fill in required default values for table definitions returned by hook_schema().
*
* @param $module
* The module for which hook_schema() was invoked.
* @param $schema
* The schema definition array as it was returned by the module's
* hook_schema().
*/
function _drupal_schema_initialize($module, &$schema) {
// Set the name and module key for all tables.
foreach ($schema as $name => $table) {
if (empty($table['module'])) {
$schema[$name]['module'] = $module;
}
if (!isset($table['name'])) {
$schema[$name]['name'] = $name;
}
}
}
/**
* Retrieve a list of fields from a table schema. The list is suitable for use in a SQL query.
*
* @param $table
* The name of the table from which to retrieve fields.
* @param
* An optional prefix to to all fields.
*
* @return An array of fields.
**/
function drupal_schema_fields_sql($table, $prefix = NULL) {
$schema = drupal_get_schema($table);
$fields = array_keys($schema['fields']);
if ($prefix) {
$columns = array();
foreach ($fields as $field) {
$columns[] = "$prefix.$field";
}
return $columns;
}
else {
return $fields;
}
}
/**
* Saves a record to the database based upon the schema.
*
* Default values are filled in for missing items, and 'serial' (auto increment)
* types are filled in with IDs.
*
* @param $table
* The name of the table; this must be defined by a hook_schema()
* implementation.
* @param $object
* An object or array representing the record to write, passed in by
* reference. The function will fill in defaults from the schema and add an
* ID value to serial fields.
* @param $primary_keys
* If this is an update, specify the primary keys' field names. If this is a
* new record, you must not provide this value. If there is only 1 field in
* the key, you may pass in a string; if there are multiple fields in the key,
* pass in an array.
*
* @return
* Failure to write a record will return FALSE. Otherwise SAVED_NEW or
* SAVED_UPDATED is returned depending on the operation performed. The $object
* parameter will contain values for any serial fields defined by the $table.
* For example, $object->nid or $object['nid'] will be populated after
* inserting a new a new node.
*/
function drupal_write_record($table, &$object, $primary_keys = array()) {
// Standardize $primary_keys to an array.
if (is_string($primary_keys)) {
$primary_keys = array($primary_keys);
}
$schema = drupal_get_schema($table);
if (empty($schema)) {
return FALSE;
}
// Convert to an object if needed.
if (is_array($object)) {
$object = (object) $object;
$array = TRUE;
}
else {
$array = FALSE;
}
$fields = array();
// Go through our schema, build SQL, and when inserting, fill in defaults for
// fields that are not set.
foreach ($schema['fields'] as $field => $info) {
if ($info['type'] == 'serial') {
// Skip serial types if we are updating.
if (!empty($primary_keys)) {
continue;
}
// Track serial field so we can helpfully populate them after the query.
// NOTE: Each table should come with one serial field only.
$serial = $field;
}
if (!property_exists($object, $field)) {
// Skip fields that are not provided, unless we are inserting and a
// default value is provided by the schema.
if (!empty($primary_keys) || !isset($info['default'])) {
continue;
}
$object->$field = $info['default'];
}
// Build array of fields to update or insert.
if (empty($info['serialize'])) {
$fields[$field] = $object->$field;
}
elseif (isset($object->$field)) {
$fields[$field] = serialize($object->$field);
}
else {
$fields[$field] = '';
}
// Type cast to proper datatype, except when the value is NULL and the
// column allows this.
//
// MySQL PDO silently casts e.g. FALSE and '' to 0 when inserting the value
// into an integer column, but PostgreSQL PDO does not. Also type cast NULL
// when the column does not allow this.
if (!is_null($object->$field) || !empty($info['not null'])) {
if ($info['type'] == 'int' || $info['type'] == 'serial') {
$fields[$field] = (int) $fields[$field];
}
elseif ($info['type'] == 'float') {
$fields[$field] = (float) $fields[$field];
}
else {
$fields[$field] = (string) $fields[$field];
}
}
}
if (empty($fields)) {
// No changes requested.
// If we began with an array, convert back so we don't surprise the caller.
if ($array) {
$object = (array) $object;
}
return;
}
// Build the SQL.
if (empty($primary_keys)) {
// We are doing an insert.
$options = array('return' => Database::RETURN_INSERT_ID);
if (isset($serial) && isset($fields[$serial])) {
// If the serial column has been explicitly set with an ID, then we don't
// require the database to return the last insert id.
if ($fields[$serial]) {
$options['return'] = Database::RETURN_AFFECTED;
}
// If a serial column does exist with no value (i.e. 0) then remove it as
// the database will insert the correct value for us.
else {
unset($fields[$serial]);
}
}
$query = db_insert($table, $options)->fields($fields);
$return = SAVED_NEW;
}
else {
$query = db_update($table)->fields($fields);
foreach ($primary_keys as $key) {
$query->condition($key, $object->$key);
}
$return = SAVED_UPDATED;
}
// Execute the SQL.
if ($query_return = $query->execute()) {
if (isset($serial)) {
// If the database was not told to return the last insert id, it will be
// because we already know it.
if (isset($options) && $options['return'] != Database::RETURN_INSERT_ID) {
$object->$serial = $fields[$serial];
}
else {
$object->$serial = $query_return;
}
}
}
// If we have a single-field primary key but got no insert ID, the
// query failed. Note that we explicitly check for FALSE, because
// a valid update query which doesn't change any values will return
// zero (0) affected rows.
elseif ($query_return === FALSE && count($primary_keys) == 1) {
$return = FALSE;
}
// If we began with an array, convert back so we don't surprise the caller.
if ($array) {
$object = (array) $object;
}
return $return;
}
/**
* @} End of "ingroup schemaapi".
*/
/**
* Parse Drupal module and theme info file format.
*
* Info files are NOT for placing arbitrary theme and module-specific settings.
* Use variable_get() and variable_set() for that.
*
* Information stored in a module .info file:
* - name: The real name of the module for display purposes.
* - description: A brief description of the module.
* - dependencies: An array of shortnames of other modules this module requires.
* - package: The name of the package of modules this module belongs to.
*
* @see forum.info
*
* Information stored in a theme .info file:
* - name: The real name of the theme for display purposes
* - description: Brief description
* - screenshot: Path to screenshot relative to the theme's .info file.
* - engine: Theme engine, typically: engine = phptemplate
* - base: Name of a base theme, if applicable, eg: base = zen
* - regions: Listed regions eg: region[left] = Left sidebar
* - features: Features available eg: features[] = logo
* - stylesheets: Theme stylesheets eg: stylesheets[all][] = my-style.css
* - scripts: Theme scripts eg: scripts[] = my-script.css
*
* @see garland.info
*
* @param $filename
* The file we are parsing. Accepts file with relative or absolute path.
* @return
* The info array.
*
* @see drupal_parse_info_format()
*/
function drupal_parse_info_file($filename) {
if (!file_exists($filename)) {
return array();
}
$data = file_get_contents($filename);
return drupal_parse_info_format($data);
}
/**
* Parse data in Drupal's .info format.
*
* Data should be in an .ini-like format to specify values. White-space
* generally doesn't matter, except inside values:
* @code
* key = value
* key = "value"
* key = 'value'
* key = "multi-line
* value"
* key = 'multi-line
* value'
* key
* =
* 'value'
* @endcode
*
* Arrays are created using a HTTP GET alike syntax:
* @code
* key[] = "numeric array"
* key[index] = "associative array"
* key[index][] = "nested numeric array"
* key[index][index] = "nested associative array"
* @endcode
*
* PHP constants are substituted in, but only when used as the entire value.
* Comments should start with a semi-colon at the beginning of a line.
*
* @param $data
* A string to parse.
* @return
* The info array.
*
* @see drupal_parse_info_file()
*/
function drupal_parse_info_format($data) {
$info = array();
$constants = get_defined_constants();
if (preg_match_all('
@^\s* # Start at the beginning of a line, ignoring leading whitespace
((?:
[^=;\[\]]| # Key names cannot contain equal signs, semi-colons or square brackets,
\[[^\[\]]*\] # unless they are balanced and not nested
)+?)
\s*=\s* # Key/value pairs are separated by equal signs (ignoring white-space)
(?:
("(?:[^"]|(?<=\\\\)")*")| # Double-quoted string, which may contain slash-escaped quotes/slashes
(\'(?:[^\']|(?<=\\\\)\')*\')| # Single-quoted string, which may contain slash-escaped quotes/slashes
([^\r\n]*?) # Non-quoted string
)\s*$ # Stop at the next end of a line, ignoring trailing whitespace
@msx', $data, $matches, PREG_SET_ORDER)) {
foreach ($matches as $match) {
// Fetch the key and value string
$i = 0;
foreach (array('key', 'value1', 'value2', 'value3') as $var) {
$$var = isset($match[++$i]) ? $match[$i] : '';
}
$value = stripslashes(substr($value1, 1, -1)) . stripslashes(substr($value2, 1, -1)) . $value3;
// Parse array syntax
$keys = preg_split('/\]?\[/', rtrim($key, ']'));
$last = array_pop($keys);
$parent = &$info;
// Create nested arrays
foreach ($keys as $key) {
if ($key == '') {
$key = count($parent);
}
if (!isset($parent[$key]) || !is_array($parent[$key])) {
$parent[$key] = array();
}
$parent = &$parent[$key];
}
// Handle PHP constants.
if (isset($constants[$value])) {
$value = $constants[$value];
}
// Insert actual value
if ($last == '') {
$last = count($parent);
}
$parent[$last] = $value;
}
}
return $info;
}
/**
* Severity levels, as defined in RFC 3164: http://www.ietf.org/rfc/rfc3164.txt.
*
* @return
* Array of the possible severity levels for log messages.
*
* @see watchdog()
*/
function watchdog_severity_levels() {
return array(
WATCHDOG_EMERGENCY => t('emergency'),
WATCHDOG_ALERT => t('alert'),
WATCHDOG_CRITICAL => t('critical'),
WATCHDOG_ERROR => t('error'),
WATCHDOG_WARNING => t('warning'),
WATCHDOG_NOTICE => t('notice'),
WATCHDOG_INFO => t('info'),
WATCHDOG_DEBUG => t('debug'),
);
}
/**
* Explode a string of given tags into an array.
*/
function drupal_explode_tags($tags) {
// This regexp allows the following types of user input:
// this, "somecompany, llc", "and ""this"" w,o.rks", foo bar
$regexp = '%(?:^|,\ *)("(?>[^"]*)(?>""[^"]* )*"|(?: [^",]*))%x';
preg_match_all($regexp, $tags, $matches);
$typed_tags = array_unique($matches[1]);
$tags = array();
foreach ($typed_tags as $tag) {
// If a user has escaped a term (to demonstrate that it is a group,
// or includes a comma or quote character), we remove the escape
// formatting so to save the term into the database as the user intends.
$tag = trim(str_replace('""', '"', preg_replace('/^"(.*)"$/', '\1', $tag)));
if ($tag != "") {
$tags[] = $tag;
}
}
return $tags;
}
/**
* Implode an array of tags into a string.
*/
function drupal_implode_tags($tags) {
$encoded_tags = array();
foreach ($tags as $tag) {
// Commas and quotes in tag names are special cases, so encode them.
if (strpos($tag, ',') !== FALSE || strpos($tag, '"') !== FALSE) {
$tag = '"' . str_replace('"', '""', $tag) . '"';
}
$encoded_tags[] = $tag;
}
return implode(', ', $encoded_tags);
}
/**
* Flush all cached data on the site.
*
* Empties cache tables, rebuilds the menu cache and theme registries, and
* invokes a hook so that other modules' cache data can be cleared as well.
*/
function drupal_flush_all_caches() {
// Change query-strings on css/js files to enforce reload for all users.
_drupal_flush_css_js();
registry_rebuild();
drupal_clear_css_cache();
drupal_clear_js_cache();
// If invoked from update.php, we must not update the theme information in the
// database, or this will result in all themes being disabled.
if (defined('MAINTENANCE_MODE') && MAINTENANCE_MODE == 'update') {
_system_rebuild_theme_data();
}
else {
system_rebuild_theme_data();
}
drupal_theme_rebuild();
menu_rebuild();
node_types_rebuild();
// Don't clear cache_form - in-progress form submissions may break.
// Ordered so clearing the page cache will always be the last action.
$core = array('cache', 'cache_filter', 'cache_bootstrap', 'cache_page');
$cache_tables = array_merge(module_invoke_all('flush_caches'), $core);
foreach ($cache_tables as $table) {
cache_clear_all('*', $table, TRUE);
}
}
/**
* Helper function to change query-strings on css/js files.
*
* Changes the character added to all css/js files as dummy query-string,
* so that all browsers are forced to reload fresh files. We keep
* 20 characters history (FIFO) to avoid repeats, but only the first two
* (newest) characters are actually used on urls, to keep them short.
* This is also called from update.php.
*/
function _drupal_flush_css_js() {
$string_history = variable_get('css_js_query_string', '00000000000000000000');
$new_character = $string_history[0];
// Not including 'q' to allow certain JavaScripts to re-use query string.
$characters = 'abcdefghijklmnoprstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
while (strpos($string_history, $new_character) !== FALSE) {
$new_character = $characters[mt_rand(0, strlen($characters) - 1)];
}
variable_set('css_js_query_string', $new_character . substr($string_history, 0, 19));
}
/**
* Debug function used for outputting debug information.
*
* The debug information is passed on to trigger_error() after being converted
* to a string using _drupal_debug_message().
*
* @param $data
* Data to be output.
* @param $label
* Label to prefix the data.
* @param $print_r
* Flag to switch between print_r() and var_export() for data conversion to
* string. Set $print_r to TRUE when dealing with a recursive data structure
* as var_export() will generate an error.
*/
function debug($data, $label = NULL, $print_r = FALSE) {
// Print $data contents to string.
$string = $print_r ? print_r($data, TRUE) : var_export($data, TRUE);
trigger_error(trim($label ? "$label: $string" : $string));
}
/**
* Parse a dependency for comparison by drupal_check_incompatibility().
*
* @param $dependency
* A dependency string, for example 'foo (>=7.x-4.5-beta5, 3.x)'.
* @return
* An associative array with three keys:
* - 'name' includes the name of the thing to depend on (e.g. 'foo').
* - 'original_version' contains the original version string (which can be
* used in the UI for reporting incompatibilities).
* - 'versions' is a list of associative arrays, each containing the keys
* 'op' and 'version'. 'op' can be one of: '=', '==', '!=', '<>', '<',
* '<=', '>', or '>='. 'version' is one piece like '4.5-beta3'.
* Callers should pass this structure to drupal_check_incompatibility().
*
* @see drupal_check_incompatibility()
*/
function drupal_parse_dependency($dependency) {
// We use named subpatterns and support every op that version_compare
// supports. Also, op is optional and defaults to equals.
$p_op = '(?P<operation>!=|==|=|<|<=|>|>=|<>)?';
// Core version is always optional: 7.x-2.x and 2.x is treated the same.
$p_core = '(?:' . preg_quote(DRUPAL_CORE_COMPATIBILITY) . '-)?';
$p_major = '(?P<major>\d+)';
// By setting the minor version to x, branches can be matched.
$p_minor = '(?P<minor>(?:\d+|x)(?:-[A-Za-z]+\d+)?)';
$value = array();
$parts = explode('(', $dependency, 2);
$value['name'] = trim($parts[0]);
if (isset($parts[1])) {
$value['original_version'] = ' (' . $parts[1];
foreach (explode(',', $parts[1]) as $version) {
if (preg_match("/^\s*$p_op\s*$p_core$p_major\.$p_minor/", $version, $matches)) {
$op = !empty($matches['operation']) ? $matches['operation'] : '=';
if ($matches['minor'] == 'x') {
// Drupal considers "2.x" to mean any version that begins with
// "2" (e.g. 2.0, 2.9 are all "2.x"). PHP's version_compare(),
// on the other hand, treats "x" as a string; so to
// version_compare(), "2.x" is considered less than 2.0. This
// means that >=2.x and <2.x are handled by version_compare()
// as we need, but > and <= are not.
if ($op == '>' || $op == '<=') {
$matches['major']++;
}
// Equivalence can be checked by adding two restrictions.
if ($op == '=' || $op == '==') {
$value['versions'][] = array('op' => '<', 'version' => ($matches['major'] + 1) . '.x');
$op = '>=';
}
}
$value['versions'][] = array('op' => $op, 'version' => $matches['major'] . '.' . $matches['minor']);
}
}
}
return $value;
}
/**
* Check whether a version is compatible with a given dependency.
*
* @param $v
* The parsed dependency structure from drupal_parse_dependency().
* @param $current_version
* The version to check against (like 4.2).
* @return
* NULL if compatible, otherwise the original dependency version string that
* caused the incompatibility.
*
* @see drupal_parse_dependency()
*/
function drupal_check_incompatibility($v, $current_version) {
if (!empty($v['versions'])) {
foreach ($v['versions'] as $required_version) {
if ((isset($required_version['op']) && !version_compare($current_version, $required_version['version'], $required_version['op']))) {
return $v['original_version'];
}
}
}
}
/**
* Get the entity info array of an entity type.
*
* @see hook_entity_info()
* @see hook_entity_info_alter()
*
* @param $entity_type
* The entity type, e.g. node, for which the info shall be returned, or NULL
* to return an array with info about all types.
*/
function entity_get_info($entity_type = NULL) {
global $language;
// Use the advanced drupal_static() pattern, since this is called very often.
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['entity_info'] = &drupal_static(__FUNCTION__);
}
$entity_info = &$drupal_static_fast['entity_info'];
// hook_entity_info() includes translated strings, so each language is cached
// separately.
$langcode = $language->language;
if (empty($entity_info)) {
if ($cache = cache_get("entity_info:$langcode")) {
$entity_info = $cache->data;
}
else {
$entity_info = module_invoke_all('entity_info');
// Merge in default values.
foreach ($entity_info as $name => $data) {
$entity_info[$name] += array(
'fieldable' => FALSE,
'controller class' => 'DrupalDefaultEntityController',
'static cache' => TRUE,
'load hook' => $name . '_load',
'bundles' => array(),
'view modes' => array(),
'object keys' => array(),
'cacheable' => TRUE,
'translation' => array(),
);
$entity_info[$name]['object keys'] += array(
'revision' => '',
'bundle' => '',
);
// If no bundle key is provided, assume a single bundle, named after
// the entity type.
if (empty($entity_info[$name]['object keys']['bundle']) && empty($entity_info[$name]['bundles'])) {
$entity_info[$name]['bundles'] = array($name => array('label' => $entity_info[$name]['label']));
}
}
// Let other modules alter the entity info.
drupal_alter('entity_info', $entity_info);
cache_set("entity_info:$langcode", $entity_info);
}
}
if (empty($entity_type)) {
return $entity_info;
}
elseif (isset($entity_info[$entity_type])) {
return $entity_info[$entity_type];
}
}
/**
* Resets the cached information about entity types.
*/
function entity_info_cache_clear() {
drupal_static_reset('entity_get_info');
// Clear all languages.
cache_clear_all('entity_info:', 'cache', TRUE);
}
/**
* Helper function to extract id, vid, and bundle name from an entity.
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $entity
* The entity from which to extract values.
* @return
* A numerically indexed array (not a hash table) containing these
* elements:
* 0: primary id of the entity
* 1: revision id of the entity, or NULL if $entity_type is not versioned
* 2: bundle name of the entity
* 3: whether $entity_type's fields should be cached (TRUE/FALSE)
*/
function entity_extract_ids($entity_type, $entity) {
$info = entity_get_info($entity_type);
// Objects being created might not have id/vid yet.
$id = isset($entity->{$info['object keys']['id']}) ? $entity->{$info['object keys']['id']} : NULL;
$vid = ($info['object keys']['revision'] && isset($entity->{$info['object keys']['revision']})) ? $entity->{$info['object keys']['revision']} : NULL;
// If no bundle key provided, then we assume a single bundle, named after the
// entity type.
$bundle = $info['object keys']['bundle'] ? $entity->{$info['object keys']['bundle']} : $entity_type;
$cacheable = $info['cacheable'];
return array($id, $vid, $bundle, $cacheable);
}
/**
* Helper function to assemble an object structure with initial ids.
*
* This function can be seen as reciprocal to entity_extract_ids().
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $ids
* A numerically indexed array, as returned by entity_extract_ids(),
* containing these elements:
* 0: primary id of the entity
* 1: revision id of the entity, or NULL if $entity_type is not versioned
* 2: bundle name of the entity
* @return
* An entity structure, initialized with the ids provided.
*/
function entity_create_stub_entity($entity_type, $ids) {
$entity = new stdClass();
$info = entity_get_info($entity_type);
$entity->{$info['object keys']['id']} = $ids[0];
if (isset($info['object keys']['revision']) && !is_null($ids[1])) {
$entity->{$info['object keys']['revision']} = $ids[1];
}
if ($info['object keys']['bundle']) {
$entity->{$info['object keys']['bundle']} = $ids[2];
}
return $entity;
}
/**
* Load entities from the database.
*
* This function should be used whenever you need to load more than one entity
* from the database. The entities are loaded into memory and will not require
* database access if loaded again during the same page request.
*
* The actual loading is done through a class that has to implement the
* DrupalEntityController interface. By default, DrupalDefaultEntityController
* is used. Entity types can specify that a different class should be used by
* setting the 'controller class' key in hook_entity_info(). These classes can
* either implement the DrupalEntityController interface, or, most commonly,
* extend the DrupalDefaultEntityController class. See node_entity_info() and
* the NodeController in node.module as an example.
*
* @see hook_entity_info()
* @see DrupalEntityController
* @see DrupalDefaultEntityController
*
* @param $entity_type
* The entity type to load, e.g. node or user.
* @param $ids
* An array of entity IDs, or FALSE to load all entities.
* @param $conditions
* An array of conditions in the form 'field' => $value.
* @param $reset
* Whether to reset the internal cache for the requested entity type.
*
* @return
* An array of entity objects indexed by their ids.
*/
function entity_load($entity_type, $ids = array(), $conditions = array(), $reset = FALSE) {
if ($reset) {
entity_get_controller($entity_type)->resetCache();
}
return entity_get_controller($entity_type)->load($ids, $conditions);
}
/**
* Get the entity controller class for an entity type.
*/
function entity_get_controller($entity_type) {
$controllers = &drupal_static(__FUNCTION__, array());
if (!isset($controllers[$entity_type])) {
$type_info = entity_get_info($entity_type);
$class = $type_info['controller class'];
$controllers[$entity_type] = new $class($entity_type);
}
return $controllers[$entity_type];
}
/**
* Invoke hook_entity_prepare_view().
*
* If adding a new entity similar to nodes, comments or users, you should
* invoke this function during the ENTITY_build_content() or
* ENTITY_view_multiple() phases of rendering to allow other modules to alter
* the objects during this phase. This is needed for situations where
* information needs to be loaded outside of ENTITY_load() - particularly
* when loading entities into one another - i.e. a user object into a node, due
* to the potential for unwanted side-effects such as caching and infinite
* recursion. By convention, entity_prepare_view() is called after
* field_attach_prepare_view() to allow entity level hooks to act on content
* loaded by field API.
* @see hook_entity_prepare_view()
*
* @param $entity_type
* The type of entity, i.e. 'node', 'user'.
* @param $entities
* The entity objects which are being prepared for view, keyed by object ID.
*/
function entity_prepare_view($entity_type, $entities) {
// To ensure hooks are only run once per entity, check for an
// entity_view_prepared flag and only process items without it.
// @todo: resolve this more generally for both entity and field level hooks.
$prepare = array();
foreach ($entities as $id => $entity) {
if (empty($entity->entity_view_prepared)) {
// Add this entity to the items to be prepared.
$prepare[$id] = $entity;
// Mark this item as prepared.
$entity->entity_view_prepared = TRUE;
}
}
if (!empty($prepare)) {
module_invoke_all('entity_prepare_view', $prepare, $entity_type);
}
}
/**
* Returns the uri elements of an entity.
*
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $entity
* The entity for which to generate a path.
* @return
* An array containing the 'path' and 'options' keys used to build the uri of
* the entity, and matching the signature of url(). NULL if the entity has no
* uri of its own.
*/
function entity_uri($entity_type, $entity) {
$info = entity_get_info($entity_type);
if (isset($info['uri callback']) && function_exists($info['uri callback'])) {
return $info['uri callback']($entity) + array('options' => array());
}
}
/**
* Invokes entity insert/update hooks.
*
* @param $op
* One of 'insert' or 'update'.
* @param $entity_type
* The entity type; e.g. 'node' or 'user'.
* @param $entity
* The entity object being operated on.
*/
function entity_invoke($op, $entity_type, $entity) {
module_invoke_all('entity_' . $op, $entity, $entity_type);
}
/**
* Performs one or more XML-RPC request(s).
*
* @param $url
* An absolute URL of the XML-RPC endpoint.
* Example:
* http://www.example.com/xmlrpc.php
* @param ...
* For one request:
* The method name followed by a variable number of arguments to the method.
* For multiple requests (system.multicall):
* An array of call arrays. Each call array follows the pattern of the single
* request: method name followed by the arguments to the method.
* @return
* For one request:
* Either the return value of the method on success, or FALSE.
* If FALSE is returned, see xmlrpc_errno() and xmlrpc_error_msg().
* For multiple requests:
* An array of results. Each result will either be the result
* returned by the method called, or an xmlrpc_error object if the call
* failed. See xmlrpc_error().
*/
function xmlrpc($url) {
require_once DRUPAL_ROOT . '/includes/xmlrpc.inc';
$args = func_get_args();
return call_user_func_array('_xmlrpc', $args);
}
/**
* Retrieves a list of all available archivers.
*
* @see hook_archiver_info()
* @see hook_archiver_info_alter()
*/
function archiver_get_info() {
$archiver_info = &drupal_static(__FUNCTION__, array());
if (empty($archiver_info)) {
$cache = cache_get('archiver_info');
if ($cache === FALSE) {
// Rebuild the cache and save it.
$archiver_info = module_invoke_all('archiver_info');
drupal_alter('archiver_info', $archiver_info);
uasort($archiver_info, 'drupal_sort_weight');
cache_set('archiver_info', $archiver_info);
}
else {
$archiver_info = $cache->data;
}
}
return $archiver_info;
}
/**
* Create the appropriate archiver for the specified file.
*
* @param $file
* The full path of the archive file. Note that stream wrapper
* paths are supported, but not remote ones.
* @return
* A newly created instance of the archiver class appropriate
* for the specified file, already bound to that file.
* If no appropriate archiver class was found, will return FALSE.
*/
function archiver_get_archiver($file) {
// Archivers can only work on local paths
$filepath = drupal_realpath($file);
if (!is_file($filepath)) {
throw new Exception(t('Archivers can only operate on local files: %file not supported', array('%file' => $file)));
}
$archiver_info = archiver_get_info();
foreach ($archiver_info as $implementation) {
foreach ($implementation['extensions'] as $extension) {
// Because extensions may be multi-part, such as .tar.gz,
// we cannot use simpler approaches like substr() or pathinfo().
// This method isn't quite as clean but gets the job done.
// Also note that the file may not yet exist, so we cannot rely
// on fileinfo() or other disk-level utilities.
if (strrpos($filepath, '.' . $extension) === strlen($filepath) - strlen('.' . $extension)) {
return new $implementation['class']($filepath);
}
}
}
}
/**
* Drupal Updater registry.
*
* An Updater is a class that knows how to update various parts of the Drupal
* file system, for example to update modules that have newer releases, or to
* install a new theme.
*
* @return
* Returns the Drupal Updater class registry.
*
* @see hook_updater_info()
* @see hook_updater_info_alter()
*/
function drupal_get_updaters() {
$updaters = &drupal_static(__FUNCTION__);
if (!isset($updaters)) {
$updaters = module_invoke_all('updater_info');
drupal_alter('updater_info', $updaters);
uasort($updaters, 'drupal_sort_weight');
}
return $updaters;
}MediaMosa API
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