system.api.php

Version 1.142 (checked in on 2010/03/11 at 21:23:06 by dries)

Hooks provided by Drupal core and the System module.

Functions

Name	Description
hook_actions_delete	Executes code after an action is deleted.
hook_action_info	Declares information about actions.
hook_action_info_alter	Alters the actions declared by another module.
hook_admin_paths	Define administrative paths.
hook_admin_paths_alter	Redefine administrative paths defined by other modules.
hook_ajax_render_alter	Alter the commands that are sent to the user through the AJAX framework.
hook_archiver_info	Declare archivers to the system.
hook_archiver_info_alter	Alter archiver information declared by other modules.
hook_boot	Perform setup tasks. See also, hook_init.
hook_countries_alter	Alter the default country list.
hook_cron	Perform periodic actions.
hook_cron_queue_info	Declare queues holding items that need to be run periodically.
hook_cron_queue_info_alter	Alter cron queue information before cron runs.
hook_css_alter	Alter CSS files before they are output on the page.
hook_custom_theme	Return the machine-readable name of the theme to use for the current page.
hook_date_formats	Defines additional date formats.
hook_date_formats_alter	Alters date types and formats declared by another module.
hook_date_format_types	Defines additional date types.
hook_disable	Perform necessary actions before module is disabled.
hook_drupal_goto_alter	Change the page the user is sent to by drupal_goto().
hook_element_info	Allows modules to declare their own Forms API element types and specify their default values.
hook_element_info_alter	Alter the element type information returned from modules.
hook_enable	Perform necessary actions after module is enabled.
hook_entity_info	Inform the base system and the Field API about one or more entity types.
hook_entity_info_alter	Alter the entity info.
hook_entity_insert	Act on entities when inserted.
hook_entity_load	Act on entities when loaded.
hook_entity_prepare_view	Act on entities as they are being prepared for view.
hook_entity_update	Act on entities when updated.
hook_exit	Perform cleanup tasks.
hook_file_copy	Respond to a file that has been copied.
hook_file_delete	Respond to a file being deleted.
hook_file_download	Control access to private file downloads and specify HTTP headers.
hook_file_insert	Respond to a file being added.
hook_file_load	Load additional information into file objects.
hook_file_mimetype_mapping_alter	Alter MIME type mappings used to determine MIME type from a file extension.
hook_file_move	Respond to a file that has been moved.
hook_file_references	Report the number of times a file is referenced by a module.
hook_file_update	Respond to a file being updated.
hook_file_url_alter	Alter the URL to a file.
hook_file_validate	Check that files meet a given criteria.
hook_flush_caches	Add a list of cache tables to be cleared.
hook_forms	Map form_ids to form builder functions.
hook_form_alter	Perform alterations before a form is rendered.
hook_form_FORM_ID_alter	Provide a form-specific alteration instead of the global hook_form_alter().
hook_hook_info	Defines one or more hooks that are exposed by a module.
hook_html_head_alter	Alter XHTML HEAD tags before they are rendered by drupal_get_html_head().
hook_image_toolkits	Define image toolkits provided by this module.
hook_init	Perform setup tasks. See also, hook_boot.
hook_install	Perform setup tasks when the module is installed.
hook_install_tasks	Return an array of tasks to be performed by an installation profile.
hook_install_tasks_alter	Alter the full list of installation tasks.
hook_js_alter	Perform necessary alterations to the JavaScript before it is presented on the page.
hook_library	Registers JavaScript/CSS libraries associated with a module.
hook_library_alter	Alters the JavaScript/CSS library registry.
hook_mail	Prepare a message based on parameters; called from drupal_mail().
hook_mail_alter	Alter an email message created with the drupal_mail() function.
hook_menu_active_handler_alter	Alters the router item for the active menu handler.
hook_modules_disabled	Perform necessary actions after modules are disabled.
hook_modules_enabled	Perform necessary actions after modules are enabled.
hook_modules_installed	Perform necessary actions after modules are installed.
hook_modules_uninstalled	Perform necessary actions after modules are uninstalled.
hook_page_alter	Perform alterations before a page is rendered.
hook_page_build	Add elements to a page before it is rendered.
hook_page_delivery_callback_alter	Alters the delivery callback used to send the result of the page callback to the browser.
hook_permission	Define user permissions.
hook_query_alter	Perform alterations to a structured query.
hook_query_TAG_alter	Perform alterations to a structured query for a given tag.
hook_registry_files_alter	Perform necessary alterations to the list of files parsed by the registry.
hook_requirements	Check installation requirements and do status reporting.
hook_schema	Define the current version of the database schema.
hook_schema_alter	Perform alterations to existing database schemas.
hook_stream_wrappers	Registers PHP stream wrapper implementations associated with a module.
hook_stream_wrappers_alter	Alters the list of PHP stream wrapper implementations.
hook_system_info_alter	Alter the information parsed from module and theme .info files
hook_system_themes_page_alter	Alters theme operation links.
hook_theme	Register a module (or theme's) theme implementations.
hook_theme_registry_alter	Alter the theme registry information returned from hook_theme().
hook_tokens	Provide replacement values for placeholder tokens.
hook_token_info	Provide metadata about available placeholder tokens and token types.
hook_token_info_alter	Alter the metadata about available placeholder tokens and token types.
hook_uninstall	Remove any information that the module sets.
hook_update_dependencies	Return an array of information about module update dependencies.
hook_update_last_removed	Return a number which is no longer available as hook_update_N().
hook_update_N	Perform a single update.
hook_url_inbound_alter	Alters inbound URL requests.
hook_url_outbound_alter	Alters outbound URLs.
hook_username_alter	Alter the username that is displayed for a user.
hook_watchdog	Log an event message
hook_xmlrpc	Register XML-RPC callbacks.
hook_xmlrpc_alter	Alter the definition of XML-RPC methods before they are called.