field_info_field($field_name)Returns data about an individual field, given a field name.
$field_name The name of the field to retrieve. $field_name can only refer to a non-deleted field.
The field array, as returned by field_read_fields(), with an additional element 'bundles', whose value is an array of all the bundles this field belongs to.
modules/field/field.info.inc, line 539
<?php
function field_info_field($field_name) {
$info = _field_info_collate_fields();
if (isset($info['fields'][$field_name])) {
return $info['fields'][$field_name];
}
}
?>