Contains filters are case sensitive
Name Locationsort descending Description
hook_custom_theme modules/system/system.api.php Return the machine-readable name of the theme to use for the current page.
hook_theme_registry_alter modules/system/system.api.php Alter the theme registry information returned from hook_theme().
hook_theme modules/system/system.api.php Register a module (or theme's) theme implementations.
hook_permission modules/system/system.api.php Define user permissions.
hook_system_info_alter modules/system/system.api.php Alter the information parsed from module and theme .info files
hook_system_theme_info modules/system/system.api.php Return additional themes provided by modules.
hook_module_implements_alter modules/system/system.api.php Alter the registry of modules implementing a hook.
hook_query_alter modules/system/system.api.php Perform alterations to a structured query.
hook_query_TAG_alter modules/system/system.api.php Perform alterations to a structured query for a given tag.
hook_install modules/system/system.api.php Perform setup tasks when the module is installed.
hook_update_N modules/system/system.api.php Perform a single update.
hook_mail_alter modules/system/system.api.php Alter an email message created with the backdrop_mail() function.
hook_image_toolkits modules/system/system.api.php Define image toolkits provided by this module.
hook_init modules/system/system.api.php Perform setup tasks for non-cached page requests.
hook_boot modules/system/system.api.php Perform setup tasks for all page requests.
hook_forms modules/system/system.api.php Map form_ids to form builder functions.
hook_form_BASE_FORM_ID_alter modules/system/system.api.php Provide a form-specific alteration for shared ('base') forms.
hook_form_FORM_ID_alter modules/system/system.api.php Provide a form-specific alteration instead of the global hook_form_alter().
hook_form_alter modules/system/system.api.php Perform alterations before a form is rendered.
hook_menu_contextual_links_alter modules/system/system.api.php Alter contextual links before they are rendered.
hook_menu_breadcrumb_alter modules/system/system.api.php Alter links in the active trail before it is rendered as the breadcrumb.
hook_menu_local_tasks_alter modules/system/system.api.php Alter tabs and actions displayed on the page before they are rendered.
hook_menu_link_delete modules/system/system.api.php Inform modules that a menu link has been deleted.
hook_menu_link_update modules/system/system.api.php Inform modules that a menu link has been updated.
hook_menu_link_insert modules/system/system.api.php Inform modules that a menu link has been created.
hook_translated_menu_link_alter modules/system/system.api.php Alter a menu link after it has been translated and before it is rendered.
hook_menu_link_alter modules/system/system.api.php Alter the data being saved to the {menu_links} table by menu_link_save().
hook_menu_alter modules/system/system.api.php Alter the data being saved to the {menu_router} table after hook_menu is invoked.
hook_menu modules/system/system.api.php Define menu items and page callbacks.
hook_menu_get_item_alter modules/system/system.api.php Alter a menu router item right after it has been retrieved from the database or cache.
hook_ajax_render_alter modules/system/system.api.php Alter the commands that are sent to the user through the Ajax framework.
hook_css_alter modules/system/system.api.php Alter CSS files before they are output on the page.
hook_library_info_alter modules/system/system.api.php Alters the JavaScript/CSS library registry.
hook_library_info modules/system/system.api.php Registers JavaScript/CSS libraries associated with a module.
hook_js_alter modules/system/system.api.php Perform necessary alterations to the JavaScript before it is presented on the page.
hook_exit modules/system/system.api.php Perform cleanup tasks.
hook_element_info_alter modules/system/system.api.php Alter the element type information returned from modules.
hook_element_info modules/system/system.api.php Allows modules to declare their own Form API element types and specify their default values.
callback_queue_worker modules/system/system.api.php Work on a single queue item.
hook_cron_queue_info_alter modules/system/system.api.php Alter cron queue information before cron runs.
hook_cron_queue_info modules/system/system.api.php Declare queues holding items that need to be run periodically.
hook_stream_wrappers_alter modules/system/system.api.php Alters the list of PHP stream wrapper implementations.
hook_update_dependencies modules/system/system.api.php Return an array of information about module update dependencies.
hook_hook_info modules/system/system.api.php Defines one or more hooks that are exposed by a module.
hook_filetransfer_info_alter modules/system/system.api.php Alter the FileTransfer class registry.
hook_filetransfer_info modules/system/system.api.php Register information about FileTransfer classes provided by a module.
hook_menu_site_status_alter modules/system/system.api.php Control site status before menu dispatching.
hook_timezone_countries_alter modules/system/system.api.php Alter the default timezone country list.
hook_countries_alter modules/system/system.api.php Alter the default country list.
hook_updater_info_alter modules/system/system.api.php Alter the Updater information array.

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