apply_filters( string $hook_name, mixed $value, mixed $args ): mixed

Calls the callback functions that have been added to a filter hook.

Description
Parameters
Return
Source
Related
- Uses
- Used By
Changelog
User Contributed Notes

Description

This function invokes all functions attached to filter hook $hook_name.
It is possible to create new filter hooks by simply calling this function, specifying the name of the new hook using the $hook_name parameter.

The function also allows for multiple additional arguments to be passed to hooks.

Example usage:

// The filter callback function.
function example_callback( $string, $arg1, $arg2 ) {
    // (maybe) modify $string.
    return $string;
}
add_filter( 'example_filter', 'example_callback', 10, 3 );

/*
 * Apply the filters by calling the 'example_callback()' function
 * that's hooked onto `example_filter` above.
 *
 * - 'example_filter' is the filter hook.
 * - 'filter me' is the value being filtered.
 * - $arg1 and $arg2 are the additional arguments passed to the callback.
$value = apply_filters( 'example_filter', 'filter me', $arg1, $arg2 );

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Parameters

$hook_name string Required: The name of the filter hook.
$value mixed Required: The value to filter.
$args mixed Required: Additional parameters to pass to the callback functions.

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Return

mixed The filtered value after all hooked functions are applied to it.

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Source

File: wp-includes/plugin.php. View all references

function apply_filters( $hook_name, $value, ...$args ) {
	global $wp_filter, $wp_filters, $wp_current_filter;

	if ( ! isset( $wp_filters[ $hook_name ] ) ) {
		$wp_filters[ $hook_name ] = 1;
	} else {
		++$wp_filters[ $hook_name ];
	}

	// Do 'all' actions first.
	if ( isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;

		$all_args = func_get_args(); // phpcs:ignore PHPCompatibility.FunctionUse.ArgumentFunctionsReportCurrentValue.NeedsInspection
		_wp_call_all_hook( $all_args );
	}

	if ( ! isset( $wp_filter[ $hook_name ] ) ) {
		if ( isset( $wp_filter['all'] ) ) {
			array_pop( $wp_current_filter );
		}

		return $value;
	}

	if ( ! isset( $wp_filter['all'] ) ) {
		$wp_current_filter[] = $hook_name;
	}

	// Pass the value to WP_Hook.
	array_unshift( $args, $value );

	$filtered = $wp_filter[ $hook_name ]->apply_filters( $value, $args );

	array_pop( $wp_current_filter );

	return $filtered;
}

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Uses

Uses
Uses	Description
_wp_call_all_hook() wp-includes/plugin.php	Calls the ‘all’ hook, which will process the functions hooked into it.

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Used By

Used By
Used By	Description
wp_img_tag_add_decoding_attr() wp-includes/media.php	Adds `decoding` attribute to an `img` HTML tag.
wp_required_field_message() wp-includes/general-template.php	Creates a message to explain required form fields.
wp_required_field_indicator() wp-includes/general-template.php	Assigns a visual indicator for required form fields.
wp_preload_resources() wp-includes/general-template.php	Prints resource preloads directives to browsers.
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WP_Site_Health::check_for_page_caching() wp-admin/includes/class-wp-site-health.php	Checks if site has page cache enabled or not.
WP_Site_Health::get_good_response_time_threshold() wp-admin/includes/class-wp-site-health.php	Gets the threshold below which a response time is considered good.
WP_Site_Health::should_suggest_persistent_object_cache() wp-admin/includes/class-wp-site-health.php	Determines whether to suggest using a persistent object cache.
WP_Site_Health::get_test_persistent_object_cache() wp-admin/includes/class-wp-site-health.php	Tests if the site uses persistent object cache and recommends to use it if not.
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wp_filesize() wp-includes/functions.php	Wrapper for PHP filesize with filters and casting the result as an integer.
wp_maybe_update_user_counts() wp-includes/user.php	Updates the total count of users on the site if live user counting is enabled.
wp_is_large_user_count() wp-includes/user.php	Determines whether the site has a large number of users.
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WP_Theme_JSON_Resolver::get_user_data() wp-includes/class-wp-theme-json-resolver.php	Returns the user’s origin config.
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WP_REST_Menu_Items_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php	Prepares a single post for create or update.
WP_REST_URL_Details_Controller::set_cache() wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php	Utility function to cache a given data set at a given cache key.
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WP_REST_Menu_Locations_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-menu-locations-controller.php	Prepares a menu location object for serialization.
WP_Theme::get_file_path() wp-includes/class-wp-theme.php	Retrieves the path of a file in the theme.
wp_list_users() wp-includes/user.php	Lists all the users of the site, with several options available.
get_block_file_template() wp-includes/block-template-utils.php	Retrieves a unified template object based on a theme file.
get_allowed_block_template_part_areas() wp-includes/block-template-utils.php	Returns a filtered list of allowed area values for template parts.
get_default_block_template_types() wp-includes/block-template-utils.php	Returns a filtered list of default template types, containing their localized titles and descriptions.
wp_omit_loading_attr_threshold() wp-includes/media.php	Gets the threshold for how many of the first content media elements to not lazy-load.
rest_get_route_for_post_type_items() wp-includes/rest-api.php	Gets the REST API route for a post type.
rest_get_route_for_taxonomy_items() wp-includes/rest-api.php	Gets the REST API route for a taxonomy.
WP_Widget_Block::widget() wp-includes/widgets/class-wp-widget-block.php	Outputs the content for the current Block widget instance.
WP_Widget_Block::get_dynamic_classname() wp-includes/widgets/class-wp-widget-block.php	Calculates the classname to use in the block widget’s container HTML.
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WP_Theme_JSON_Resolver::get_theme_data() wp-includes/class-wp-theme-json-resolver.php	Returns the theme’s data.
WP_Theme_JSON_Resolver::get_core_data() wp-includes/class-wp-theme-json-resolver.php	Returns core’s origin config.
WP_REST_Widgets_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-widgets-controller.php	Prepares the widget for the REST response.
WP_REST_Sidebars_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-sidebars-controller.php	Prepares a single sidebar output for response.
WP_REST_Templates_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-templates-controller.php	Prepare a single template output for response
WP_REST_Pattern_Directory_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-pattern-directory-controller.php	Prepare a raw block pattern before it gets output in a REST API response.
WP_REST_Pattern_Directory_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-pattern-directory-controller.php	Retrieves the search parameters for the block pattern’s collection.
WP_REST_Widget_Types_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-widget-types-controller.php	Prepares a widget type object for serialization.
WP_REST_Widget_Types_Controller::encode_form_data() wp-includes/rest-api/endpoints/class-wp-rest-widget-types-controller.php	An RPC-style endpoint which can be used by clients to turn user input in a widget admin form into an encoded instance object.
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get_block_editor_settings() wp-includes/block-editor.php	Returns the contextualized block editor settings for a selected editor context.
block_editor_rest_api_preload() wp-includes/block-editor.php	Preloads common data used with the block editor by specifying an array of REST API paths that will be preloaded for a given block editor context.
get_allowed_block_types() wp-includes/block-editor.php	Gets the list of allowed block types to use in the block editor.
get_default_block_editor_settings() wp-includes/block-editor.php	Returns the default block editor settings.
wp_render_widget() wp-includes/widgets.php	Calls the render callback of a widget and returns the output.
wp_use_widgets_block_editor() wp-includes/widgets.php	Whether or not to use the block editor to manage widgets. Defaults to true unless a theme has removed support for widgets-block-editor or a plugin has filtered the return value of this function.
wp_xmlrpc_server::set_is_enabled() wp-includes/class-wp-xmlrpc-server.php	Set wp_xmlrpc_server::$is_enabled property.
wp_maybe_inline_styles() wp-includes/script-loader.php	Allows small styles to be inlined.
wp_should_load_separate_core_block_assets() wp-includes/script-loader.php	Checks whether separate styles should be loaded for core blocks on-render.
WP_Theme_JSON::get_style_nodes() wp-includes/class-wp-theme-json.php	Builds metadata for the style nodes, which returns in the form of:
get_block_templates() wp-includes/block-template-utils.php	Retrieves a list of unified template objects based on a query.
get_block_template() wp-includes/block-template-utils.php	Retrieves a single unified template object using its id.
get_adjacent_image_link() wp-includes/media.php	Gets the next or previous image link that has the same post parent.
build_query_vars_from_query_block() wp-includes/blocks.php	Helper function that constructs a WP_Query args array from a `Query` block properties.
wp_robots() wp-includes/robots-template.php	Displays the robots meta tag as necessary.
wp_get_inline_script_tag() wp-includes/script-loader.php	Wraps inline JavaScript in tag.
wp_get_script_tag() wp-includes/script-loader.php	Formats loader tags.
wp_get_update_https_url() wp-includes/functions.php	Gets the URL to learn more about updating the site to use HTTPS.
wp_get_direct_update_https_url() wp-includes/functions.php	Gets the URL for directly updating the site to use HTTPS.
is_post_status_viewable() wp-includes/post.php	Determines whether a post status is considered “viewable”.
wp_iframe_tag_add_loading_attr() wp-includes/media.php	Adds `loading` attribute to an `iframe` HTML tag.
wp_update_https_detection_errors() wp-includes/https-detection.php	Runs a remote HTTPS request to detect whether HTTPS supported, and stores potential errors.
wp_is_site_url_using_https() wp-includes/https-detection.php	Checks whether the current site’s URL where WordPress is stored is using HTTPS.
wp_should_replace_insecure_home_url() wp-includes/https-migration.php	Checks whether WordPress should replace old HTTP URLs to the site with their HTTPS counterpart.
wp_is_site_protected_by_basic_auth() wp-includes/load.php	Checks if this site is protected by HTTP Basic Auth.
wpmu_new_site_admin_notification() wp-includes/ms-functions.php	Notifies the Multisite network administrator that a new site was created.
WP_REST_Server::get_max_batch_size() wp-includes/rest-api/class-wp-rest-server.php	Gets the maximum number of requests that can be included in a batch.
WP_REST_Server::serve_batch_request_v1() wp-includes/rest-api/class-wp-rest-server.php	Serves the batch/v1 request.
WP_REST_Server::respond_to_request() wp-includes/rest-api/class-wp-rest-server.php	Dispatches the request to the callback handler.
WP_REST_Site_Health_Controller::validate_request_permission() wp-includes/rest-api/endpoints/class-wp-rest-site-health-controller.php	Validates if the current user can request this REST endpoint.
WP_REST_Application_Passwords_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-application-passwords-controller.php	Prepares an application password for a create or update operation.
WP_REST_Application_Passwords_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-application-passwords-controller.php	Prepares the application password for the REST response.
WP_REST_Comments_Controller::check_is_comment_content_allowed() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	If empty comments are not allowed, checks if the provided comment content is not empty.
WP_REST_Term_Search_Handler::search_items() wp-includes/rest-api/search/class-wp-rest-term-search-handler.php	Searches the object type content for a given search request.
WP_REST_Post_Format_Search_Handler::search_items() wp-includes/rest-api/search/class-wp-rest-post-format-search-handler.php	Searches the object type content for a given search request.
wp_should_load_block_editor_scripts_and_styles() wp-includes/script-loader.php	Checks if the editor scripts and styles for all registered block types should be enqueued on the current screen.
wp_is_application_passwords_available() wp-includes/user.php	Checks if Application Passwords is globally available.
wp_is_application_passwords_available_for_user() wp-includes/user.php	Checks if Application Passwords is available for a specific user.
wp_authenticate_application_password() wp-includes/user.php	Authenticates the user using an application password.
get_media_states() wp-admin/includes/template.php	Retrieves an array of media states from an attachment.
wp_is_auto_update_forced_for_item() wp-admin/includes/update.php	Checks whether auto-updates are forced for an item.
WP_Comments_List_Table::comment_type_dropdown() wp-admin/includes/class-wp-comments-list-table.php	Displays a comment type drop-down for filtering on the Comments list table.
core_auto_updates_settings() wp-admin/update-core.php	Display WordPress auto-updates settings.
esc_xml() wp-includes/formatting.php	Escaping for XML blocks.
get_metadata_default() wp-includes/meta.php	Retrieves default metadata value for the specified meta key and object.
get_metadata_raw() wp-includes/meta.php	Retrieves raw metadata value for the specified object.
WP_Block::render() wp-includes/class-wp-block.php	Generates the render output for the block.
wp_is_maintenance_mode() wp-includes/load.php	Check if maintenance mode is enabled.
WP_REST_Block_Directory_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-block-directory-controller.php	Retrieves the search params for the blocks collection.
WP_REST_Plugins_Controller::create_item() wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php	Uploads a plugin and optionally activates it.
WP_REST_Plugins_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-plugins-controller.php	Prepares the plugin for the REST response.
WP_REST_Block_Types_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-block-types-controller.php	Prepares a block type object for serialization.
WP_REST_Attachments_Controller::edit_media_item() wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php	Applies edits to a media item and creates a new attachment record.
_wp_batch_update_comment_type() wp-includes/comment.php	Updates the comment type for a batch of comments.
wp_img_tag_add_loading_attr() wp-includes/media.php	Adds `loading` attribute to an `img` HTML tag.
wp_img_tag_add_width_and_height_attr() wp-includes/media.php	Adds `width` and `height` attributes to an `img` HTML tag.
wp_img_tag_add_srcset_and_sizes_attr() wp-includes/media.php	Adds `srcset` and `sizes` attributes to an existing `img` HTML tag.
wp_image_src_get_dimensions() wp-includes/media.php	Determines an image’s width and height dimensions based on the source file.
wp_lazy_loading_enabled() wp-includes/media.php	Determines whether to add the `loading` attribute to the specified tag in the specified context.
wp_filter_content_tags() wp-includes/media.php	Filters specific tags in post content and modifies their markup.
wp_image_file_matches_image_meta() wp-includes/media.php	Determines if the image meta data is for the image source file.
rest_get_route_for_post() wp-includes/rest-api.php	Gets the REST API route for a post.
rest_get_route_for_term() wp-includes/rest-api.php	Gets the REST API route for a term.
rest_get_queried_resource_route() wp-includes/rest-api.php	Gets the REST route for the currently queried object.
WP_Embed::get_embed_handler_html() wp-includes/class-wp-embed.php	Returns embed HTML for a given URL from embed handlers.
register_block_type_from_metadata() wp-includes/blocks.php	Registers a block type from the metadata stored in the `block.json` file.
wp_sitemaps_get_max_urls() wp-includes/sitemaps.php	Gets the maximum number of URLs for a sitemap.
WP_Sitemaps_Provider::get_sitemap_entries() wp-includes/sitemaps/class-wp-sitemaps-provider.php	Lists sitemap pages exposed by this provider.
WP_Sitemaps_Renderer::get_sitemap_index_stylesheet_url() wp-includes/sitemaps/class-wp-sitemaps-renderer.php	Gets the URL for the sitemap index stylesheet.
WP_Sitemaps::sitemaps_enabled() wp-includes/sitemaps/class-wp-sitemaps.php	Determines whether sitemaps are enabled or not.
WP_Sitemaps_Users::get_url_list() wp-includes/sitemaps/providers/class-wp-sitemaps-users.php	Gets a URL list for a user sitemap.
WP_Sitemaps_Users::get_max_num_pages() wp-includes/sitemaps/providers/class-wp-sitemaps-users.php	Gets the max number of pages available for the object type.
WP_Sitemaps_Users::get_users_query_args() wp-includes/sitemaps/providers/class-wp-sitemaps-users.php	Returns the query args for retrieving users to list in the sitemap.
WP_Sitemaps_Renderer::get_sitemap_stylesheet_url() wp-includes/sitemaps/class-wp-sitemaps-renderer.php	Gets the URL for the sitemap stylesheet.
WP_Sitemaps_Taxonomies::get_object_subtypes() wp-includes/sitemaps/providers/class-wp-sitemaps-taxonomies.php	Returns all public, registered taxonomies.
WP_Sitemaps_Taxonomies::get_url_list() wp-includes/sitemaps/providers/class-wp-sitemaps-taxonomies.php	Gets a URL list for a taxonomy sitemap.
WP_Sitemaps_Taxonomies::get_max_num_pages() wp-includes/sitemaps/providers/class-wp-sitemaps-taxonomies.php	Gets the max number of pages available for the object type.
WP_Sitemaps_Taxonomies::get_taxonomies_query_args() wp-includes/sitemaps/providers/class-wp-sitemaps-taxonomies.php	Returns the query args for retrieving taxonomy terms to list in the sitemap.
WP_Sitemaps_Posts::get_posts_query_args() wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php	Returns the query args for retrieving posts to list in the sitemap.
WP_Sitemaps_Posts::get_object_subtypes() wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php	Returns the public post types, which excludes nav_items and similar types.
WP_Sitemaps_Posts::get_url_list() wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php	Gets a URL list for a post type sitemap.
WP_Sitemaps_Posts::get_max_num_pages() wp-includes/sitemaps/providers/class-wp-sitemaps-posts.php	Gets the max number of pages available for the object type.
WP_Sitemaps_Stylesheet::get_stylesheet_css() wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php	Gets the CSS to be included in sitemap XSL stylesheets.
WP_Sitemaps_Registry::add_provider() wp-includes/sitemaps/class-wp-sitemaps-registry.php	Adds a new sitemap provider.
WP_Sitemaps_Stylesheet::get_sitemap_stylesheet() wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php	Returns the escaped XSL for all sitemaps, except index.
WP_Sitemaps_Stylesheet::get_sitemap_index_stylesheet() wp-includes/sitemaps/class-wp-sitemaps-stylesheet.php	Returns the escaped XSL for the index sitemaps.
wp_admin_viewport_meta() wp-admin/includes/misc.php	Displays the viewport meta in the admin.
wp_opcache_invalidate() wp-admin/includes/file.php	Attempts to clear the opcode cache for an individual PHP file.
WP_Automatic_Updater::send_plugin_theme_email() wp-admin/includes/class-wp-automatic-updater.php	Sends an email upon the completion or failure of a plugin or theme background update.
WP_Automatic_Updater::after_plugin_theme_update() wp-admin/includes/class-wp-automatic-updater.php	If we tried to perform plugin or theme updates, check if we should send an email.
wp_is_auto_update_enabled_for_type() wp-admin/includes/update.php	Checks whether auto-updates are enabled.
Plugin_Installer_Skin::do_overwrite() wp-admin/includes/class-plugin-installer-skin.php	Check if the plugin can be overwritten and output the HTML for overwriting a plugin on upload.
Theme_Installer_Skin::do_overwrite() wp-admin/includes/class-theme-installer-skin.php	Check if the theme can be overwritten and output the HTML for overwriting a theme on upload.
WP_MS_Themes_List_Table::column_autoupdates() wp-admin/includes/class-wp-ms-themes-list-table.php	Handles the auto-updates column output.
wp_ajax_toggle_auto_updates() wp-admin/includes/ajax-actions.php	Ajax handler to enable or disable plugin and theme auto-updates.
wp_theme_auto_update_setting_template() wp-admin/themes.php	Returns the JavaScript template used to display the auto-update setting for a theme.
WP_Site_Health::perform_test() wp-admin/includes/class-wp-site-health.php	Runs a Site Health test directly.
wpdb::log_query() wp-includes/class-wpdb.php	Logs query data.
WP_Image_Editor::maybe_exif_rotate() wp-includes/class-wp-image-editor.php	Check if a JPEG image has EXIF Orientation tag and rotate it if needed.
wp_date() wp-includes/functions.php	Retrieves the date, in localized format.
wp_get_original_image_path() wp-includes/post.php	Retrieves the path to an uploaded image file.
wp_get_original_image_url() wp-includes/post.php	Retrieves the URL to an original attachment image.
get_post_states() wp-admin/includes/template.php	Retrieves an array of post states from a post.
wp_get_missing_image_subsizes() wp-admin/includes/image.php	Compare the existing image sub-sizes (as saved in the attachment meta) to the currently registered image sub-sizes, and return the difference.
wp_update_image_subsizes() wp-admin/includes/image.php	If any of the currently registered image sub-sizes are missing, create them and update the image meta data.
wp_create_image_subsizes() wp-admin/includes/image.php	Creates image sub-sizes, adds the new data to the image meta `sizes` array, and updates the image metadata.
WP_Privacy_Data_Removal_Requests_List_Table::column_email() wp-admin/includes/class-wp-privacy-data-removal-requests-list-table.php	Actions column.
WP_Privacy_Data_Removal_Requests_List_Table::column_next_steps() wp-admin/includes/class-wp-privacy-data-removal-requests-list-table.php	Next steps column.
WP_MS_Sites_List_Table::site_states() wp-admin/includes/class-wp-ms-sites-list-table.php	Maybe output comma-separated site states.
WP_Privacy_Data_Export_Requests_List_Table::column_email() wp-admin/includes/class-wp-privacy-data-export-requests-list-table.php	Actions column.
WP_Privacy_Data_Export_Requests_List_Table::column_next_steps() wp-admin/includes/class-wp-privacy-data-export-requests-list-table.php	Displays the next steps column.
WP_Recovery_Mode::get_email_rate_limit() wp-includes/class-wp-recovery-mode.php	Gets the rate limit between sending new recovery mode email links.
WP_Recovery_Mode::get_link_ttl() wp-includes/class-wp-recovery-mode.php	Gets the number of seconds the recovery mode link is valid for.
wp_is_jsonp_request() wp-includes/load.php	Checks whether current request is a JSONP request, or is expecting a JSONP response.
is_protected_endpoint() wp-includes/load.php	Determines whether we are currently on an endpoint that should be protected against WSODs.
is_protected_ajax_action() wp-includes/load.php	Determines whether we are currently handling an Ajax action that should be protected against WSODs.
get_feed_build_date() wp-includes/feed.php	Gets the UTC time of the most recently modified post from WP_Query.
WP_Recovery_Mode_Email_Service::send_recovery_mode_email() wp-includes/class-wp-recovery-mode-email-service.php	Sends the Recovery Mode email to the site admin email address.
WP_Recovery_Mode_Link_Service::get_recovery_mode_begin_url() wp-includes/class-wp-recovery-mode-link-service.php	Gets a URL to begin recovery mode.
WP_Recovery_Mode_Cookie_Service::set_cookie() wp-includes/class-wp-recovery-mode-cookie-service.php	Sets the recovery mode cookie.
WP_Recovery_Mode_Cookie_Service::validate_cookie() wp-includes/class-wp-recovery-mode-cookie-service.php	Validates the recovery mode cookie.
wp_is_fatal_error_handler_enabled() wp-includes/error-protection.php	Checks whether the fatal error handler is enabled.
WP_Fatal_Error_Handler::display_default_error_template() wp-includes/class-wp-fatal-error-handler.php	Displays the default PHP error template.
WP_Fatal_Error_Handler::should_handle_error() wp-includes/class-wp-fatal-error-handler.php	Determines whether we are dealing with an error that WordPress should handle in order to protect the admin backend against WSODs.
wp_filter_oembed_iframe_title_attribute() wp-includes/embed.php	Filters the given oEmbed HTML to make sure iframes have a title attribute.
WP_Query::generate_postdata() wp-includes/class-wp-query.php	Generate post data.
WP_Debug_Data::debug_data() wp-admin/includes/class-wp-debug-data.php	Static function for generating site debug data when required.
wp_trusted_keys() wp-admin/includes/file.php	Retrieves the list of signing keys trusted by WordPress.
WP_Site_Health::get_test_rest_availability() wp-admin/includes/class-wp-site-health.php	Tests if the REST API is accessible.
WP_Site_Health::get_tests() wp-admin/includes/class-wp-site-health.php	Returns a set of tests that belong to the site status page.
WP_Site_Health::can_perform_loopback() wp-admin/includes/class-wp-site-health.php	Runs a loopback test on the site.
WP_Site_Health::get_test_php_extensions() wp-admin/includes/class-wp-site-health.php	Tests if required PHP modules are installed on the host.
WP_Posts_List_Table::formats_dropdown() wp-admin/includes/class-wp-posts-list-table.php	Displays a formats drop-down for filtering items.
WP_Site_Health_Auto_Updates::test_accepts_dev_updates() wp-admin/includes/class-wp-site-health-auto-updates.php	Checks if the install is using a development branch and can use nightly packages.
WP_Site_Health_Auto_Updates::test_accepts_minor_updates() wp-admin/includes/class-wp-site-health-auto-updates.php	Checks if the site supports automatic minor updates.
WP_Site_Health_Auto_Updates::test_filters_automatic_updater_disabled() wp-admin/includes/class-wp-site-health-auto-updates.php	Checks if automatic updates are disabled by a filter.
WP_Site_Health_Auto_Updates::test_vcs_abspath() wp-admin/includes/class-wp-site-health-auto-updates.php	Checks if WordPress is controlled by a VCS (Git, Subversion etc).
wp_get_direct_php_update_url() wp-includes/functions.php	Gets the URL for directly updating the PHP version the site is running on.
wp_targeted_link_rel_callback() wp-includes/formatting.php	Callback to add `rel="noopener"` string to HTML A element.
wp_using_themes() wp-includes/load.php	Determines whether the current request should use themes.
wp_get_ready_cron_jobs() wp-includes/cron.php	Retrieve cron jobs ready to be run.
wp_get_scheduled_event() wp-includes/cron.php	Retrieve a scheduled event.
wp_initialize_site() wp-includes/ms-site.php	Runs the initialization routine for a given site.
wp_uninitialize_site() wp-includes/ms-site.php	Runs the uninitialization routine for a given site.
wp_is_site_initialized() wp-includes/ms-site.php	Checks whether a site is initialized.
wp_prepare_site_data() wp-includes/ms-site.php	Prepares site data for insertion or update in the database.
wp_get_update_php_url() wp-includes/functions.php	Gets the URL to learn more about updating the PHP version the site is running on.
is_avatar_comment_type() wp-includes/link-template.php	Check if this comment type allows avatars to be retrieved.
wp_check_php_version() wp-admin/includes/misc.php	Checks if the user needs to update PHP.
populate_network_meta() wp-admin/includes/schema.php	Creates WordPress network meta and sets the default values.
populate_site_meta() wp-admin/includes/schema.php	Creates WordPress site meta and sets the default values.
load_script_translations() wp-includes/l10n.php	Loads the translation data for the given script handle and text domain.
wp_kses_uri_attributes() wp-includes/kses.php	Returns an array of HTML attribute names whose value contains a URL.
WP_REST_Themes_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php	Prepares a single theme output for response.
WP_REST_Themes_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-themes-controller.php	Retrieves the search params for the themes collection.
WP_REST_Autosaves_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php	Prepares the revision for the REST response.
WP_REST_Revisions_Controller::prepare_items_query() wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php	Determines the allowed query_vars for a get_items() response and prepares them for WP_Query.
WP_REST_Post_Search_Handler::search_items() wp-includes/rest-api/search/class-wp-rest-post-search-handler.php	Searches the object type content for a given search request.
load_script_textdomain() wp-includes/l10n.php	Loads the script translated strings.
determine_locale() wp-includes/l10n.php	Determines the current locale desired for the request.
wp_get_script_polyfill() wp-includes/script-loader.php	Returns contents of an inline script used in appending polyfill scripts for browsers which fail the provided tests. The provided array is a mapping from a condition to verify feature support to its polyfill script handle.
wp_tinymce_inline_scripts() wp-includes/script-loader.php	Adds inline scripts required for the TinyMCE in the block editor.
get_oembed_response_data_for_url() wp-includes/embed.php	Retrieves the oEmbed response data for a given URL.
wp_get_code_editor_settings() wp-includes/general-template.php	Generates and returns code editor settings.
rest_preload_api_request() wp-includes/rest-api.php	Append result of internal request to REST API for purpose of preloading data to be attached to a page.
WP_Block_Type::set_props() wp-includes/class-wp-block-type.php	Sets block type properties.
parse_blocks() wp-includes/blocks.php	Parses blocks out of a content string.
excerpt_remove_blocks() wp-includes/blocks.php	Parses blocks out of a content string, and renders those appropriate for the excerpt.
render_block() wp-includes/blocks.php	Renders a single block into a HTML string.
the_block_editor_meta_boxes() wp-admin/includes/post.php	Renders the meta boxes forms.
use_block_editor_for_post_type() wp-includes/post.php	Returns whether a post type is compatible with the block editor.
get_block_categories() wp-includes/block-editor.php	Returns all the categories for block types that will be shown in the block editor.
use_block_editor_for_post() wp-includes/post.php	Returns whether the post can be edited in the block editor.
get_object_subtype() wp-includes/meta.php	Returns the object subtype for a given object ID of a specific type.
wp_comments_personal_data_eraser() wp-includes/comment.php	Erases personal data associated with an email address from the comments table.
wp_privacy_delete_old_export_files() wp-includes/functions.php	Cleans up export files older than three days old.
wp_privacy_exports_dir() wp-includes/functions.php	Returns the directory used to store personal data export files.
wp_privacy_exports_url() wp-includes/functions.php	Returns the URL of the directory used to store personal data export files.
wp_privacy_anonymize_data() wp-includes/functions.php	Returns uniform “anonymous” data by type.
wp_validate_user_request_key() wp-includes/user.php	Validates a user request by comparing the key with the request’s key.
_wp_privacy_send_request_confirmation_notification() wp-includes/user.php	Notifies the site administrator via email when a request is confirmed.
_wp_privacy_send_erasure_fulfillment_notification() wp-includes/user.php	Notifies the user when their erasure request is fulfilled.
_wp_privacy_account_request_confirmed_message() wp-includes/user.php	Returns request confirmation message HTML.
wp_user_request_action_description() wp-includes/user.php	Gets action description from the name and return a string.
wp_send_user_request() wp-includes/user.php	Send a confirmation request email to confirm an action.
wp_user_personal_data_exporter() wp-includes/user.php	Finds and exports personal data associated with an email address from the user and user_meta table.
get_the_privacy_policy_link() wp-includes/link-template.php	Returns the privacy policy link with formatting, when applicable.
get_privacy_policy_url() wp-includes/link-template.php	Retrieves the URL to the privacy policy page.
wp_privacy_process_personal_data_export_page() wp-admin/includes/privacy-tools.php	Intercept personal data exporter page Ajax responses in order to assemble the personal data export file.
wp_privacy_send_personal_data_export_email() wp-admin/includes/privacy-tools.php	Send an email to the user with a link to the personal data export file
wp_privacy_process_personal_data_erasure_page() wp-admin/includes/privacy-tools.php	Mark erasure requests as completed after processing is finished.
_wp_personal_data_cleanup_requests() wp-admin/includes/privacy-tools.php	Cleans up failed and expired requests before displaying the list table.
wp_ajax_wp_privacy_export_personal_data() wp-admin/includes/ajax-actions.php	Ajax handler for exporting a user’s personal data.
wp_ajax_wp_privacy_erase_personal_data() wp-admin/includes/ajax-actions.php	Ajax handler for erasing personal data.
WP_Network::get_main_site_id() wp-includes/class-wp-network.php	Returns the main site ID for the network.
wp_unschedule_hook() wp-includes/cron.php	Unschedules all events attached to the hook.
WP_Customize_Manager::handle_load_themes_request() wp-includes/class-wp-customize-manager.php	Loads themes into the theme browsing/installation UI.
WP_Customize_Manager::trash_changeset_post() wp-includes/class-wp-customize-manager.php	Trashes or deletes a changeset post.
WP_Customize_Manager::branching() wp-includes/class-wp-customize-manager.php	Whether the changeset branching is allowed.
get_the_post_type_description() wp-includes/general-template.php	Retrieves the description for a post type archive.
wp_get_nav_menu_name() wp-includes/nav-menu.php	Returns the name of a navigation menu.
wp_site_admin_email_change_notification() wp-includes/functions.php	Sends an email to the old site admin email address when the site admin email address changes.
WP_Widget_Media_Gallery::get_instance_schema() wp-includes/widgets/class-wp-widget-media-gallery.php	Get schema for properties of a widget instance (item).
WP_Widget_Custom_HTML::widget() wp-includes/widgets/class-wp-widget-custom-html.php	Outputs the content for the current Custom HTML widget instance.
update_network_option_new_admin_email() wp-includes/ms-functions.php	Sends a confirmation request email when a change of network admin email address is attempted.
wp_network_admin_email_change_notification() wp-includes/ms-functions.php	Sends an email to the old network admin email address when the network admin email address changes.
wp_admin_headers() wp-admin/includes/misc.php	Sends a referrer policy header so referrers are not sent externally from administration screens.
wp_get_plugin_file_editable_extensions() wp-admin/includes/file.php	Gets the list of file extensions that are editable in plugins.
wp_get_theme_file_editable_extensions() wp-admin/includes/file.php	Gets the list of file extensions that are editable for a given theme.
wp_edit_theme_plugin_file() wp-admin/includes/file.php	Attempts to edit a file for a theme or plugin.
wp_doing_cron() wp-includes/load.php	Determines whether the current request is a WordPress cron request.
wp_is_file_mod_allowed() wp-includes/load.php	Determines whether file modifications are allowed.
WP_oEmbed_Controller::get_proxy_item() wp-includes/class-wp-oembed-controller.php	Callback for the proxy API endpoint.
WP_Widget_Media_Audio::enqueue_preview_scripts() wp-includes/widgets/class-wp-widget-media-audio.php	Enqueue preview scripts.
WP_Widget_Media_Video::enqueue_preview_scripts() wp-includes/widgets/class-wp-widget-media-video.php	Enqueue preview scripts.
WP_Widget_Media::get_instance_schema() wp-includes/widgets/class-wp-widget-media.php	Get schema for properties of a widget instance (item).
WP_Widget_Media::widget() wp-includes/widgets/class-wp-widget-media.php	Displays the widget on the front-end.
rest_get_avatar_sizes() wp-includes/rest-api.php	Retrieves the pixel sizes for avatars.
create_initial_rest_routes() wp-includes/rest-api.php	Registers default REST API routes.
wp_doing_ajax() wp-includes/load.php	Determines whether the current request is a WordPress Ajax request.
WP_Customize_Manager::get_allowed_urls() wp-includes/class-wp-customize-manager.php	Gets URLs allowed to be previewed.
WP_Customize_Manager::save_changeset_post() wp-includes/class-wp-customize-manager.php	Saves the post for the loaded changeset.
get_theme_starter_content() wp-includes/theme.php	Expands a theme’s starter content configuration using core-provided data.
wp_update_custom_css_post() wp-includes/theme.php	Updates the `custom_css` post for a given theme.
wp_get_custom_css() wp-includes/theme.php	Fetches the saved Custom CSS content for rendering.
get_header_video_url() wp-includes/theme.php	Retrieves header video URL for custom header.
get_header_video_settings() wp-includes/theme.php	Retrieves header video settings.
is_header_video_active() wp-includes/theme.php	Checks whether the custom header video is eligible to show on the current page.
WP_REST_Users_Controller::check_username() wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Check a username for the REST API.
WP_REST_Users_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Retrieves the query params for collections.
WP_REST_Users_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Prepares a single user output for response.
WP_REST_Users_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Prepares a single user for creation or update.
WP_REST_Users_Controller::get_items() wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Retrieves all users.
WP_REST_Revisions_Controller::prepare_excerpt_response() wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php	Checks the post excerpt and prepare it for single post output.
WP_REST_Revisions_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php	Prepares the revision for the REST response.
WP_REST_Revisions_Controller::get_items() wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php	Gets a collection of revisions.
WP_REST_Attachments_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php	Prepares a single attachment output for response.
WP_REST_Post_Statuses_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-post-statuses-controller.php	Prepares a post status object for serialization.
WP_REST_Settings_Controller::get_item() wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php	Retrieves the settings.
WP_REST_Settings_Controller::update_item() wp-includes/rest-api/endpoints/class-wp-rest-settings-controller.php	Updates settings for the settings object.
WP_REST_Terms_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php	Prepares a single term output for response.
WP_REST_Terms_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php	Retrieves the query params for collections.
WP_REST_Terms_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php	Prepares a single term for create or update.
WP_REST_Terms_Controller::get_items() wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php	Retrieves terms associated with a taxonomy.
WP_REST_Posts_Controller::get_item_schema() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Retrieves the post’s schema, conforming to JSON Schema.
WP_REST_Posts_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Retrieves the query params for the posts collection.
WP_REST_Posts_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Prepares a single post output for response.
WP_REST_Posts_Controller::prepare_items_query() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Determines the allowed query_vars for a get_items() response and prepares them for WP_Query.
WP_REST_Posts_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Prepares a single post for create or update.
WP_REST_Posts_Controller::delete_item() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Deletes a single post.
WP_REST_Posts_Controller::get_items() wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php	Retrieves a collection of posts.
WP_REST_Taxonomies_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-taxonomies-controller.php	Prepares a taxonomy object for serialization.
WP_REST_Post_Types_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-post-types-controller.php	Prepares a post type object for serialization.
WP_REST_Comments_Controller::get_collection_params() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Retrieves the query params for collections.
WP_REST_Comments_Controller::prepare_item_for_response() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Prepares a single comment output for response.
WP_REST_Comments_Controller::prepare_item_for_database() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Prepares a single comment to be inserted into the database.
WP_REST_Comments_Controller::delete_item() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Deletes a comment.
WP_REST_Comments_Controller::create_item_permissions_check() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Checks if a given request has access to create a comment.
WP_REST_Comments_Controller::create_item() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Creates a comment.
WP_REST_Comments_Controller::get_items() wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php	Retrieves a list of comment items.
WP_Taxonomy::set_props() wp-includes/class-wp-taxonomy.php	Sets taxonomy properties.
sanitize_textarea_field() wp-includes/formatting.php	Sanitizes a multiline string from user input or from the database.
wp_check_comment_flood() wp-includes/comment.php	Checks whether comment flooding is occurring.
get_parent_theme_file_path() wp-includes/link-template.php	Retrieves the path of a file in the parent theme.
get_parent_theme_file_uri() wp-includes/link-template.php	Retrieves the URL of a file in the parent theme.
get_theme_file_path() wp-includes/link-template.php	Retrieves the path of a file in the theme.
get_theme_file_uri() wp-includes/link-template.php	Retrieves the URL of a file in the theme.
WP_Customize_Custom_CSS_Setting::value() wp-includes/customize/class-wp-customize-custom-css-setting.php	Fetch the value of the setting. Will return the previewed value when `preview()` is called.
WP_Customize_Nav_Menu_Item_Setting::get_original_title() wp-includes/customize/class-wp-customize-nav-menu-item-setting.php	Get original title.
WP_Term_Query::get_terms() wp-includes/class-wp-term-query.php	Retrieves the query results.
WP_Term_Query::parse_orderby() wp-includes/class-wp-term-query.php	Parse and sanitize ‘orderby’ keys passed to the term query.
WP_Term_Query::parse_query() wp-includes/class-wp-term-query.php	Parse arguments passed to the term query with default query parameters.
WP_Customize_Manager::validate_setting_values() wp-includes/class-wp-customize-manager.php	Validates setting values.
WP_Customize_Setting::validate() wp-includes/class-wp-customize-setting.php	Validates an input.
WP_Network_Query::set_found_networks() wp-includes/class-wp-network-query.php	Populates found_networks and max_num_pages properties for the current query if the limit clause was used.
wp_resource_hints() wp-includes/general-template.php	Prints resource hints to browsers for pre-fetching, pre-rendering and pre-connecting to web sites.
get_network() wp-includes/ms-network.php	Retrieves network data given a network ID or network object.
get_site() wp-includes/ms-site.php	Retrieves site data given a site ID or site object.
WP_Post_Type::set_props() wp-includes/class-wp-post-type.php	Sets post type properties.
WP_Site::get_details() wp-includes/class-wp-site.php	Retrieves the details for this site.
WP_Comment_Query::set_found_comments() wp-includes/class-wp-comment-query.php	Populates found_comments and max_num_pages properties for the current query if the limit clause was used.
the_post_thumbnail_caption() wp-includes/post-thumbnail-template.php	Displays the post thumbnail caption.
wp_raise_memory_limit() wp-includes/functions.php	Attempts to raise the PHP memory limit for memory intensive processes.
_deprecated_hook() wp-includes/functions.php	Marks a deprecated action or filter hook as deprecated and throws a notice.
wp_get_ext_types() wp-includes/functions.php	Retrieves the list of common file extensions and their types.
wp_get_canonical_url() wp-includes/link-template.php	Returns the canonical URL for a post.
wp_get_attachment_caption() wp-includes/post.php	Retrieves the caption for an attachment.
WP_Site_Query::get_site_ids() wp-includes/class-wp-site-query.php	Used internally to get a list of site IDs matching the query vars.
WP_Site_Query::set_found_sites() wp-includes/class-wp-site-query.php	Populates found_sites and max_num_pages properties for the current query if the limit clause was used.
WP_Posts_List_Table::categories_dropdown() wp-admin/includes/class-wp-posts-list-table.php	Displays a categories drop-down for filtering on the Posts list table.
network_edit_site_nav() wp-admin/includes/ms.php	Outputs the HTML for a network’s “Edit Site” tabular interface.
wxr_term_meta() wp-admin/includes/export.php	Outputs term meta XML tags for a given term object.
rest_get_server() wp-includes/rest-api.php	Retrieves the current REST server instance.
the_embed_site_title() wp-includes/embed.php	Prints the necessary markup for the site title in an embed template.
WP_Customize_Manager::get_nonces() wp-includes/class-wp-customize-manager.php	Gets nonces for the Customizer.
WP_Customize_Manager::get_previewable_devices() wp-includes/class-wp-customize-manager.php	Returns a list of devices to allow previewing.
WP_Image_Editor_Imagick::thumbnail_image() wp-includes/class-wp-image-editor-imagick.php	Efficiently resize the current image
get_custom_logo() wp-includes/general-template.php	Returns a custom logo, linked to home unless the theme supports removing the link on the home page.
WP_REST_Request::from_url() wp-includes/rest-api/class-wp-rest-request.php	Retrieves a WP_REST_Request object from a full URL.
WP_REST_Response::get_curies() wp-includes/rest-api/class-wp-rest-response.php	Retrieves the CURIEs (compact URIs) used for relations.
_wp_get_current_user() wp-includes/user.php	Retrieves the current user object.
wp_authenticate_email_password() wp-includes/user.php	Authenticates a user using the email and password.
wp_get_comment_fields_max_lengths() wp-includes/comment.php	Retrieves the maximum character lengths for the comment form fields.
WP_Customize_Partial::render() wp-includes/customize/class-wp-customize-partial.php	Renders the template partial involving the associated settings.
WP_Customize_Selective_Refresh::add_dynamic_partials() wp-includes/customize/class-wp-customize-selective-refresh.php	Registers dynamically-created partials.
WP_Customize_Selective_Refresh::handle_render_partials_request() wp-includes/customize/class-wp-customize-selective-refresh.php	Handles the Ajax request to return the rendered partials for the requested placements.
WP_Customize_Selective_Refresh::add_partial() wp-includes/customize/class-wp-customize-selective-refresh.php	Adds a partial.
WP_Network::get_by_path() wp-includes/class-wp-network.php	Retrieves the closest matching network for a domain and path.
get_rest_url() wp-includes/rest-api.php	Retrieves the URL to a REST endpoint on a site.
rest_get_url_prefix() wp-includes/rest-api.php	Retrieves the URL prefix for any API resource.
the_excerpt_embed() wp-includes/embed.php	Displays the post excerpt for the embed template.
wp_oembed_add_discovery_links() wp-includes/embed.php	Adds oEmbed discovery links in the head element of the website.
get_post_embed_url() wp-includes/embed.php	Retrieves the URL to embed a specific post in an iframe.
get_oembed_endpoint_url() wp-includes/embed.php	Retrieves the oEmbed endpoint URL for a given permalink.
get_post_embed_html() wp-includes/embed.php	Retrieves the embed code for a specific post.
get_oembed_response_data() wp-includes/embed.php	Retrieves the oEmbed response data for a given post.
get_header_image_tag() wp-includes/theme.php	Creates image tag markup for a custom header image.
get_the_author_posts_link() wp-includes/author-template.php	Retrieves an HTML link to the author page of the current post’s author.
wp_get_document_title() wp-includes/general-template.php	Returns document title for the current page.
wp_calculate_image_srcset() wp-includes/media.php	A helper function to calculate the image sources to include in a ‘srcset’ attribute.
wp_calculate_image_sizes() wp-includes/media.php	Creates a ‘sizes’ attribute value for an image.
WP_REST_Request::get_parameter_order() wp-includes/rest-api/class-wp-rest-request.php	Retrieves the parameter priority order.
WP_REST_Server::get_data_for_routes() wp-includes/rest-api/class-wp-rest-server.php	Retrieves the publicly-visible data for routes.
WP_REST_Server::dispatch() wp-includes/rest-api/class-wp-rest-server.php	Matches the request to a callback and call it.
WP_REST_Server::get_index() wp-includes/rest-api/class-wp-rest-server.php	Retrieves the site index.
WP_REST_Server::get_namespace_index() wp-includes/rest-api/class-wp-rest-server.php	Retrieves the index for a namespace.
WP_REST_Server::envelope_response() wp-includes/rest-api/class-wp-rest-server.php	Wraps the response in an envelope.
WP_REST_Server::get_routes() wp-includes/rest-api/class-wp-rest-server.php	Retrieves the route map.
WP_REST_Server::serve_request() wp-includes/rest-api/class-wp-rest-server.php	Handles serving a REST API request.
WP_REST_Server::embed_links() wp-includes/rest-api/class-wp-rest-server.php	Embeds the links from the data into the request.
WP_REST_Server::check_authentication() wp-includes/rest-api/class-wp-rest-server.php	Checks the authentication headers if supplied.
WP_oEmbed_Controller::get_item() wp-includes/class-wp-oembed-controller.php	Callback for the embed API endpoint.
WP_oEmbed_Controller::register_routes() wp-includes/class-wp-oembed-controller.php	Register the oEmbed REST API route.
get_password_reset_key() wp-includes/user.php	Creates, stores, then returns a password reset key for user.
get_the_post_thumbnail_url() wp-includes/post-thumbnail-template.php	Returns the post thumbnail URL.
wp_removable_query_args() wp-includes/functions.php	Returns an array of single-use query variable names that can be removed from a URL.
wp_handle_comment_submission() wp-includes/comment.php	Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.
wp_new_comment_notify_moderator() wp-includes/comment.php	Sends a comment moderation notification to the comment moderator.
wp_new_comment_notify_postauthor() wp-includes/comment.php	Sends a notification of a new comment to the post author.
get_preview_post_link() wp-includes/link-template.php	Retrieves the URL used for the post preview.
is_post_type_viewable() wp-includes/post.php	Determines whether a post type is considered “viewable”.
update_network_option() wp-includes/option.php	Updates the value of a network option that was already added.
add_network_option() wp-includes/option.php	Adds a new network option.
get_network_option() wp-includes/option.php	Retrieves a network’s option value based on the option name.
get_subdirectory_reserved_names() wp-includes/ms-functions.php	Retrieves a list of reserved site on a sub-directory Multisite installation.
WP_Screen::render_view_mode() wp-admin/includes/class-wp-screen.php	Renders the list table view mode preferences.
WP_Users_List_Table::get_role_list() wp-admin/includes/class-wp-users-list-table.php	Returns an array of translated user role names for a given user object.
signup_get_available_languages() wp-signup.php	Retrieves languages available during the site/user sign-up process.
WP_Customize_Nav_Menu_Setting::sanitize() wp-includes/customize/class-wp-customize-nav-menu-setting.php	Sanitize an input.
WP_Customize_Nav_Menu_Item_Setting::value_as_wp_post_nav_menu_item() wp-includes/customize/class-wp-customize-nav-menu-item-setting.php	Get the value emulated into a WP_Post and set up as a nav_menu_item.
WP_Customize_Nav_Menu_Item_Setting::sanitize() wp-includes/customize/class-wp-customize-nav-menu-item-setting.php	Sanitize an input.
get_language_attributes() wp-includes/general-template.php	Gets the language attributes for the ‘html’ tag.
wp_site_icon() wp-includes/general-template.php	Displays site icon meta tags.
get_site_icon_url() wp-includes/general-template.php	Returns the Site Icon URL.
get_main_network_id() wp-includes/functions.php	Gets the main network ID.
_deprecated_constructor() wp-includes/functions.php	Marks a constructor as deprecated and informs when it has been used.
format_for_editor() wp-includes/formatting.php	Formats text for the editor.
get_default_comment_status() wp-includes/comment.php	Gets the default comment status for a post type.
WP_Customize_Nav_Menus::search_available_items_query() wp-includes/class-wp-customize-nav-menus.php	Performs post queries for available-item searching.
WP_Customize_Nav_Menus::available_item_types() wp-includes/class-wp-customize-nav-menus.php	Returns an array of all the available item types.
WP_Customize_Nav_Menus::load_available_items_query() wp-includes/class-wp-customize-nav-menus.php	Performs the post_type and taxonomy queries for loading available menu items.
WP_Posts_List_Table::handle_row_actions() wp-admin/includes/class-wp-posts-list-table.php	Generates and displays row action links.
WP_Posts_List_Table::column_cb() wp-admin/includes/class-wp-posts-list-table.php	Handles the checkbox column output.
WP_Posts_List_Table::column_title() wp-admin/includes/class-wp-posts-list-table.php	Handles the title column output.
WP_Posts_List_Table::column_date() wp-admin/includes/class-wp-posts-list-table.php	Handles the post date column output.
WP_Posts_List_Table::column_default() wp-admin/includes/class-wp-posts-list-table.php	Handles the default column output.
WP_MS_Themes_List_Table::column_name() wp-admin/includes/class-wp-ms-themes-list-table.php	Handles the name column output.
WP_MS_Themes_List_Table::column_description() wp-admin/includes/class-wp-ms-themes-list-table.php	Handles the description column output.
WP_Site_Icon::insert_attachment() wp-admin/includes/class-wp-site-icon.php	Inserts an attachment.
WP_Site_Icon::additional_sizes() wp-admin/includes/class-wp-site-icon.php	Adds additional sizes to be made when creating the site icon images.
WP_Site_Icon::intermediate_image_sizes() wp-admin/includes/class-wp-site-icon.php	Adds Site Icon sizes to the array of image sizes on demand.
WP_Comments_List_Table::handle_row_actions() wp-admin/includes/class-wp-comments-list-table.php	Generates and displays row actions links.
wp_ajax_crop_image() wp-admin/includes/ajax-actions.php	Ajax handler for cropping an image.
WP_List_Table::get_primary_column_name() wp-admin/includes/class-wp-list-table.php	Gets the name of the primary column.
WP_MS_Sites_List_Table::handle_row_actions() wp-admin/includes/class-wp-ms-sites-list-table.php	Generates and displays row action links.
WP_Terms_List_Table::handle_row_actions() wp-admin/includes/class-wp-terms-list-table.php	Generates and displays row action links.
WP_MS_Users_List_Table::handle_row_actions() wp-admin/includes/class-wp-ms-users-list-table.php	Generates and displays row action links.
WP_MS_Users_List_Table::column_blogs() wp-admin/includes/class-wp-ms-users-list-table.php	Handles the sites column output.
WP_MS_Users_List_Table::column_default() wp-admin/includes/class-wp-ms-users-list-table.php	Handles the default column output.
WP_Media_List_Table::column_date() wp-admin/includes/class-wp-media-list-table.php	Handles the date column output.
wp_should_upgrade_global_tables() wp-admin/includes/upgrade.php	Determine if global tables should be upgraded.
WP_Customize_Manager::add_dynamic_settings() wp-includes/class-wp-customize-manager.php	Registers any dynamically-created settings, such as those from $_POST[‘customized’] that have no corresponding setting created.
wpdb::get_table_charset() wp-includes/class-wpdb.php	Retrieves the character set for the given table.
wpdb::get_col_charset() wp-includes/class-wpdb.php	Retrieves the character set for the given column.
wp_delete_file() wp-includes/functions.php	Deletes a file.
wp_staticize_emoji() wp-includes/formatting.php	Converts emoji to a static img element.
wp_staticize_emoji_for_email() wp-includes/formatting.php	Converts emoji in emails into static images.
get_avatar_data() wp-includes/link-template.php	Retrieves default data about the avatar.
the_meta() wp-includes/post-template.php	Displays a list of post custom fields.
wp_edit_attachments_query_vars() wp-admin/includes/post.php	Returns the query variables for the current attachments request.
WP_Meta_Query::find_compatible_table_alias() wp-includes/class-wp-meta-query.php	Identify an existing table alias that is compatible with the current query clause.
WP_Customize_Panel::active() wp-includes/class-wp-customize-panel.php	Check whether panel is active to current Customizer preview.
get_the_archive_description() wp-includes/general-template.php	Retrieves the description for an author, post type, or term archive.
get_the_archive_title() wp-includes/general-template.php	Retrieves the archive title based on the queried object.
wp_get_password_hint() wp-includes/user.php	Gets the text suggesting how to create strong passwords.
_navigation_markup() wp-includes/link-template.php	Wraps passed links in navigational markup.
get_the_posts_pagination() wp-includes/link-template.php	Retrieves a paginated navigation to next/previous set of posts, when applicable.
WP_Customize_Section::active() wp-includes/class-wp-customize-section.php	Check whether section is active to current Customizer preview.
WP_Session_Tokens::create() wp-includes/class-wp-session-tokens.php	Generates a session token and attaches session information to it.
WP_Session_Tokens::destroy_all_for_all_users() wp-includes/class-wp-session-tokens.php	Destroys all sessions for all users.
WP_Session_Tokens::get_instance() wp-includes/class-wp-session-tokens.php	Retrieves a session manager instance for a user.
WP_Customize_Control::active() wp-includes/class-wp-customize-control.php	Check whether control is active to current Customizer preview.
get_editor_stylesheets() wp-includes/theme.php	Retrieves any registered editor stylesheet URLs.
get_comments_number_text() wp-includes/comment-template.php	Displays the language string for the number of comments the current post has.
attachment_url_to_postid() wp-includes/media.php	Tries to convert an attachment URL into a post ID.
wp_embed_handler_youtube() wp-includes/embed.php	YouTube iframe embed handler callback.
wp_spaces_regexp() wp-includes/formatting.php	Returns the regexp for common whitespace characters.
WP_Media_List_Table::views() wp-admin/includes/class-wp-media-list-table.php	Override parent views so we can use the filter bar display.
_wp_handle_upload() wp-admin/includes/file.php	Handles PHP uploads in WordPress.
WP_Plugin_Install_List_Table::views() wp-admin/includes/class-wp-plugin-install-list-table.php	Overrides parent views so we can use the filter bar display.
translations_api() wp-admin/includes/translation-install.php	Retrieve translations from WordPress Translation API.
login_footer() wp-login.php	Outputs the footer for the login page.
retrieve_password() wp-includes/user.php	Handles sending a password retrieval email to a user.
login_header() wp-login.php	Output the login page header.
signup_another_blog() wp-signup.php	Shows a form for returning users to sign up for another site.
validate_another_blog_signup() wp-signup.php	Validates a new site sign-up for an existing user.
signup_user() wp-signup.php	Shows a form for a visitor to sign up for a new user account.
validate_user_signup() wp-signup.php	Validates the new user sign-up.
signup_blog() wp-signup.php	Shows a form for a user or visitor to sign up for a new site.
validate_blog_signup() wp-signup.php	Validates new site signup.
allow_subdirectory_install() wp-admin/includes/network.php	Allow subdirectory installation.
WP_Automatic_Updater::run() wp-admin/includes/class-wp-automatic-updater.php	Kicks off the background update process, looping through all pending updates.
WP_Automatic_Updater::send_email() wp-admin/includes/class-wp-automatic-updater.php	Sends an email upon the completion or failure of a background core update.
WP_Automatic_Updater::send_debug_email() wp-admin/includes/class-wp-automatic-updater.php	Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
WP_Automatic_Updater::is_disabled() wp-admin/includes/class-wp-automatic-updater.php	Determines whether the entire automatic updater is disabled.
WP_Automatic_Updater::is_vcs_checkout() wp-admin/includes/class-wp-automatic-updater.php	Checks for version control checkouts.
WP_Automatic_Updater::should_update() wp-admin/includes/class-wp-automatic-updater.php	Tests to see if we can and should update a specific item.
WP_Automatic_Updater::send_core_update_notification_email() wp-admin/includes/class-wp-automatic-updater.php	Notifies an administrator of a core update.
Core_Upgrader::upgrade() wp-admin/includes/class-core-upgrader.php	Upgrade WordPress core.
Core_Upgrader::should_update_to_version() wp-admin/includes/class-core-upgrader.php	Determines if this WordPress Core version should update to an offered version or not.
Language_Pack_Upgrader::async_upgrade() wp-admin/includes/class-language-pack-upgrader.php	Asynchronously upgrades language packs after other upgrades have been made.
WP_Upgrader::download_package() wp-admin/includes/class-wp-upgrader.php	Download a package.
WP_Upgrader::install_package() wp-admin/includes/class-wp-upgrader.php	Install a package.
WP_Upgrader::run() wp-admin/includes/class-wp-upgrader.php	Run an upgrade/installation.
WP_MS_Users_List_Table::prepare_items() wp-admin/includes/class-wp-ms-users-list-table.php
WP_MS_Users_List_Table::get_columns() wp-admin/includes/class-wp-ms-users-list-table.php
wp_prepare_themes_for_js() wp-admin/includes/theme.php	Prepares themes for JavaScript.
WP_Screen::show_screen_options() wp-admin/includes/class-wp-screen.php
WP_Screen::render_screen_options() wp-admin/includes/class-wp-screen.php	Renders the screen options tab.
WP_Screen::render_per_page_options() wp-admin/includes/class-wp-screen.php	Renders the items per page option.
themes_api() wp-admin/includes/theme.php	Retrieves theme installer pages from the WordPress.org Themes API.
WP_Screen::render_screen_meta() wp-admin/includes/class-wp-screen.php	Renders the screen’s help section.
WP_Screen::get() wp-admin/includes/class-wp-screen.php	Fetches a screen object.
WP_Plugins_List_Table::single_row() wp-admin/includes/class-wp-plugins-list-table.php
get_column_headers() wp-admin/includes/screen.php	Get the column headers for a screen
get_hidden_columns() wp-admin/includes/screen.php	Get a list of hidden columns.
get_hidden_meta_boxes() wp-admin/includes/screen.php	Gets an array of IDs of hidden meta boxes.
WP_Plugins_List_Table::prepare_items() wp-admin/includes/class-wp-plugins-list-table.php
export_wp() wp-admin/includes/export.php	Generates the WXR export file for download.
wp_create_thumbnail() wp-admin/includes/deprecated.php	This was once used to create a thumbnail from an Image given a maximum side size.
get_editable_authors() wp-admin/includes/deprecated.php	Gets author users who can edit posts.
get_others_unpublished_posts() wp-admin/includes/deprecated.php	Retrieves editable posts from other users.
Language_Pack_Upgrader_Skin::bulk_footer() wp-admin/includes/class-language-pack-upgrader-skin.php
Theme_Upgrader_Skin::after() wp-admin/includes/class-theme-upgrader-skin.php	Action to perform following a single theme update.
Plugin_Installer_Skin::after() wp-admin/includes/class-plugin-installer-skin.php	Action to perform following a plugin install.
Theme_Installer_Skin::after() wp-admin/includes/class-theme-installer-skin.php	Action to perform following a single theme install.
Bulk_Theme_Upgrader_Skin::bulk_footer() wp-admin/includes/class-bulk-theme-upgrader-skin.php
Bulk_Plugin_Upgrader_Skin::bulk_footer() wp-admin/includes/class-bulk-plugin-upgrader-skin.php
Plugin_Upgrader_Skin::after() wp-admin/includes/class-plugin-upgrader-skin.php	Action to perform following a single plugin update.
WP_List_Table::get_items_per_page() wp-admin/includes/class-wp-list-table.php	Gets the number of items to display on a single page.
WP_List_Table::get_column_info() wp-admin/includes/class-wp-list-table.php	Gets a list of all, hidden, and sortable columns, with filter applied.
WP_List_Table::views() wp-admin/includes/class-wp-list-table.php	Displays the list of views available on this table.
WP_List_Table::bulk_actions() wp-admin/includes/class-wp-list-table.php	Displays the bulk actions dropdown.
WP_List_Table::months_dropdown() wp-admin/includes/class-wp-list-table.php	Displays a dropdown for filtering items in the list table by month.
mu_dropdown_languages() wp-admin/includes/ms.php	Generates and displays a drop-down of available languages.
can_edit_network() wp-admin/includes/ms.php	Whether or not we can edit this network from this page.
format_code_lang() wp-admin/includes/ms.php	Returns the language for a language code.
update_option_new_admin_email() wp-admin/includes/misc.php	Sends a confirmation request email when a change of site admin email address is attempted.
send_confirmation_on_profile_email() wp-includes/user.php	Sends a confirmation request email when a change of user email address is attempted.
wp_save_image_file() wp-admin/includes/image-edit.php	Saves image to file.
image_edit_apply_changes() wp-admin/includes/image-edit.php	Performs group of changes on Editor specified.
wp_image_editor() wp-admin/includes/image-edit.php	Loads the WP image-editing interface.
wp_stream_image() wp-admin/includes/image-edit.php	Streams image in WP_Image_Editor to browser.
WP_MS_Themes_List_Table::prepare_items() wp-admin/includes/class-wp-ms-themes-list-table.php
insert_with_markers() wp-admin/includes/misc.php	Inserts an array of strings into a file (.htaccess), placing it between BEGIN and END markers.
wp_doc_link_parse() wp-admin/includes/misc.php
set_screen_options() wp-admin/includes/misc.php	Saves option for number of rows when listing posts, pages, comments, etc.
got_mod_rewrite() wp-admin/includes/misc.php	Returns whether the server is running Apache with the mod_rewrite module loaded.
got_url_rewrite() wp-admin/includes/misc.php	Returns whether the server supports URL rewriting.
get_terms_to_edit() wp-admin/includes/taxonomy.php	Gets comma-separated list of terms available to edit for the given post ID.
WP_Theme_Install_List_Table::prepare_items() wp-admin/includes/class-wp-theme-install-list-table.php
WP_Theme_Install_List_Table::single_row() wp-admin/includes/class-wp-theme-install-list-table.php	Prints a theme from the WordPress.org API.
update_right_now_message() wp-admin/includes/update.php	Displays WordPress version and active theme in the ‘At a Glance’ dashboard widget.
wp_generate_attachment_metadata() wp-admin/includes/image.php	Generates attachment meta data and create image sub-sizes for images.
wp_read_image_metadata() wp-admin/includes/image.php	Gets extended image metadata, exif or iptc as available.
file_is_displayable_image() wp-admin/includes/image.php	Validates that file is suitable for displaying within a web page.
load_image_to_edit() wp-admin/includes/image.php	Loads an image resource for editing.
_load_image_to_edit_path() wp-admin/includes/image.php	Retrieves the path or URL of an attachment’s attached file.
plugins_api() wp-admin/includes/plugin-install.php	Retrieves plugin installer pages from the WordPress.org Plugins API.
wp_dashboard_recent_posts() wp-admin/includes/dashboard.php	Generates Publishing Soon and Recently Published sections.
wp_dashboard_primary() wp-admin/includes/dashboard.php	‘WordPress Events and News’ dashboard widget.
wp_dashboard_browser_nag() wp-admin/includes/dashboard.php	Displays the browser update nag.
wp_dashboard_right_now() wp-admin/includes/dashboard.php	Dashboard widget that displays some basic stats about the site.
wp_dashboard_quick_press() wp-admin/includes/dashboard.php	The Quick Draft widget display and creation of drafts.
wp_dashboard_recent_drafts() wp-admin/includes/dashboard.php	Show recent drafts of the user on the dashboard.
_wp_dashboard_recent_comments_row() wp-admin/includes/dashboard.php	Outputs a row for the Recent Comments widget.
wp_dashboard_setup() wp-admin/includes/dashboard.php	Registers dashboard widgets.
dbDelta() wp-admin/includes/upgrade.php	Modifies the database based on specified SQL statements.
wp_new_blog_notification() wp-admin/includes/upgrade.php	Notifies the site admin that the installation of WordPress is complete.
register_setting() wp-includes/option.php	Registers a setting and its data.
_get_list_table() wp-admin/includes/list-table.php	Fetches an instance of a WP_List_Table class.
get_plugin_files() wp-admin/includes/plugin.php	Gets a list of a plugin’s files.
WP_Plugin_Install_List_Table::display_rows() wp-admin/includes/class-wp-plugin-install-list-table.php
edit_user() wp-admin/includes/user.php	Edit user settings based on contents of $_POST
get_editable_roles() wp-admin/includes/user.php	Fetch a filtered list of user roles that the current user is allowed to edit.
get_users_drafts() wp-admin/includes/user.php	Retrieve the user’s drafts.
wp_delete_user() wp-admin/includes/user.php	Remove user and optionally reassign posts and links to another user.
WP_Plugin_Install_List_Table::prepare_items() wp-admin/includes/class-wp-plugin-install-list-table.php
Walker_Category_Checklist::start_el() wp-admin/includes/class-walker-category-checklist.php	Start the element output.
iframe_header() wp-admin/includes/template.php	Generic Iframe header for use with Thickbox.
get_inline_data() wp-admin/includes/template.php	Adds hidden fields with the data for use in the inline editor for posts and pages.
wp_comment_reply() wp-admin/includes/template.php	Outputs the in-line comment reply-to form in the Comments list table.
meta_form() wp-admin/includes/template.php	Prints the form in the Custom Fields meta box.
wp_import_upload_form() wp-admin/includes/template.php	Outputs the form used by the importers to accept the data to be imported.
WP_Themes_List_Table::display_rows() wp-admin/includes/class-wp-themes-list-table.php
wp_terms_checklist() wp-admin/includes/template.php	Outputs an unordered list of checkbox input elements labelled with term names.
wp_popular_terms_checklist() wp-admin/includes/template.php	Retrieves a list of the most popular terms from the specified taxonomy.
wp_link_category_checklist() wp-admin/includes/template.php	Outputs a link category checklist element.
WP_MS_Sites_List_Table::prepare_items() wp-admin/includes/class-wp-ms-sites-list-table.php	Prepares the list of sites for display.
WP_MS_Sites_List_Table::get_columns() wp-admin/includes/class-wp-ms-sites-list-table.php
WP_Users_List_Table::single_row() wp-admin/includes/class-wp-users-list-table.php	Generate HTML for a single row on the users.php admin panel.
WP_Users_List_Table::prepare_items() wp-admin/includes/class-wp-users-list-table.php	Prepare the users list for display.
wp_read_video_metadata() wp-admin/includes/media.php	Retrieves metadata from a video file’s ID3 tags.
wp_read_audio_metadata() wp-admin/includes/media.php	Retrieves metadata from an audio file’s ID3 tags.
media_upload_type_form() wp-admin/includes/media.php	Outputs the legacy media upload form for a given media type.
media_upload_type_url_form() wp-admin/includes/media.php	Outputs the legacy media upload form for external media.
media_upload_gallery_form() wp-admin/includes/media.php	Adds gallery form to upload iframe.
media_upload_library_form() wp-admin/includes/media.php	Outputs the legacy media upload form for the media library.
wp_media_insert_url_form() wp-admin/includes/media.php	Creates the form for external url.
attachment_submitbox_metadata() wp-admin/includes/media.php	Displays non-editable attachment metadata in the publish meta box.
get_attachment_fields_to_edit() wp-admin/includes/media.php	Retrieves the attachment fields to edit form fields.
get_media_item() wp-admin/includes/media.php	Retrieves HTML form for modifying the image attachment.
get_compat_media_markup() wp-admin/includes/media.php
media_upload_form() wp-admin/includes/media.php	Outputs the legacy media upload form.
media_upload_form_handler() wp-admin/includes/media.php	Handles form submissions for the legacy media uploader.
wp_media_upload_handler() wp-admin/includes/media.php	Handles the process of uploading media.
media_sideload_image() wp-admin/includes/media.php	Downloads an image from the specified URL, saves it as an attachment, and optionally attaches it to a post.
image_size_input_fields() wp-admin/includes/media.php	Retrieves HTML for the size radio buttons with the specified one checked.
the_media_upload_tabs() wp-admin/includes/media.php	Outputs the legacy media upload tabs UI.
get_image_send_to_editor() wp-admin/includes/media.php	Retrieves the image HTML to send to the editor.
image_add_caption() wp-admin/includes/media.php	Adds image shortcode with caption to editor.
get_upload_iframe_src() wp-admin/includes/media.php	Retrieves the upload iframe source URL.
get_sample_permalink_html() wp-admin/includes/post.php	Returns the HTML of the sample permalink slug editor.
_wp_post_thumbnail_html() wp-admin/includes/post.php	Returns HTML for the post thumbnail meta box.
wp_check_post_lock() wp-admin/includes/post.php	Determines whether the post is currently being edited by another user.
_admin_notice_post_locked() wp-admin/includes/post.php	Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.
media_upload_tabs() wp-admin/includes/media.php	Defines the default media upload tabs.
wp_edit_posts_query() wp-admin/includes/post.php	Runs the query to fetch the posts for listing on the edit posts page.
postbox_classes() wp-admin/includes/post.php	Returns the list of classes to be used by a meta box.
get_sample_permalink() wp-admin/includes/post.php	Returns a sample permalink based on the post name.
edit_post() wp-admin/includes/post.php	Updates an existing post with values provided in `$_POST`.
get_default_post_to_edit() wp-admin/includes/post.php	Returns default post information to use when populating the “Write Post” form.
wp_ajax_send_attachment_to_editor() wp-admin/includes/ajax-actions.php	Ajax handler for sending an attachment to the editor.
wp_ajax_send_link_to_editor() wp-admin/includes/ajax-actions.php	Ajax handler for sending a link to the editor.
wp_ajax_heartbeat() wp-admin/includes/ajax-actions.php	Ajax handler for the Heartbeat API.
wp_ajax_query_themes() wp-admin/includes/ajax-actions.php	Ajax handler for getting themes from themes_api() .
wp_ajax_wp_remove_post_lock() wp-admin/includes/ajax-actions.php	Ajax handler for removing a post lock.
wp_ajax_query_attachments() wp-admin/includes/ajax-actions.php	Ajax handler for querying attachments.
wp_ajax_save_attachment_compat() wp-admin/includes/ajax-actions.php	Ajax handler for saving backward compatible attachment attributes.
wp_ajax_add_menu_item() wp-admin/includes/ajax-actions.php	Ajax handler for adding a menu item.
wp_ajax_menu_get_metabox() wp-admin/includes/ajax-actions.php	Ajax handler for retrieving menu meta boxes.
wp_ajax_inline_save() wp-admin/includes/ajax-actions.php	Ajax handler for Quick Edit saving a post from a list table.
wp_get_revision_ui_diff() wp-admin/includes/revision.php	Get the revision UI diff.
wp_prepare_revisions_for_js() wp-admin/includes/revision.php	Prepare revisions for JavaScript.
wp_ajax_nopriv_heartbeat() wp-admin/includes/ajax-actions.php	Ajax handler for the Heartbeat API in the no-privilege context.
wp_ajax_ajax_tag_search() wp-admin/includes/ajax-actions.php	Ajax handler for tag search.
wp_ajax_autocomplete_user() wp-admin/includes/ajax-actions.php	Ajax handler for user autocomplete.
update_core() wp-admin/includes/update-core.php	Upgrades the core of WordPress.
post_slug_meta_box() wp-admin/includes/meta-boxes.php	Displays slug form fields.
page_attributes_meta_box() wp-admin/includes/meta-boxes.php	Displays page attributes form fields.
post_categories_meta_box() wp-admin/includes/meta-boxes.php	Displays post categories form fields.
add_menu_classes() wp-admin/includes/menu.php	Adds CSS classes for top-level administration menu items.
WP_Media_List_Table::get_columns() wp-admin/includes/class-wp-media-list-table.php
WP_Media_List_Table::_get_row_actions() wp-admin/includes/class-wp-media-list-table.php
WP_Comments_List_Table::column_author() wp-admin/includes/class-wp-comments-list-table.php
WP_Comments_List_Table::get_views() wp-admin/includes/class-wp-comments-list-table.php
WP_Comments_List_Table::column_comment() wp-admin/includes/class-wp-comments-list-table.php
WP_Comments_List_Table::prepare_items() wp-admin/includes/class-wp-comments-list-table.php
WP_Comments_List_Table::get_per_page() wp-admin/includes/class-wp-comments-list-table.php
WP_Terms_List_Table::column_name() wp-admin/includes/class-wp-terms-list-table.php
WP_Terms_List_Table::column_slug() wp-admin/includes/class-wp-terms-list-table.php
WP_Terms_List_Table::column_default() wp-admin/includes/class-wp-terms-list-table.php
WP_Terms_List_Table::prepare_items() wp-admin/includes/class-wp-terms-list-table.php
Walker_Nav_Menu_Checklist::start_el() wp-admin/includes/class-walker-nav-menu-checklist.php	Start the element output.
wp_nav_menu_post_type_meta_boxes() wp-admin/includes/nav-menu.php	Creates meta boxes for any post type menu item.
wp_nav_menu_taxonomy_meta_boxes() wp-admin/includes/nav-menu.php	Creates meta boxes for any taxonomy menu item.
wp_nav_menu_item_post_type_meta_box() wp-admin/includes/nav-menu.php	Displays a meta box for a post type menu item.
wp_get_nav_menu_to_edit() wp-admin/includes/nav-menu.php	Returns the menu formatted to edit.
get_filesystem_method() wp-admin/includes/file.php	Determines which method to use for reading, writing, modifying, or deleting files on the filesystem.
request_filesystem_credentials() wp-admin/includes/file.php	Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.
download_url() wp-admin/includes/file.php	Downloads a URL to a local temporary file using the WordPress HTTP API.
unzip_file() wp-admin/includes/file.php	Unzips a specified ZIP file to a location on the filesystem via the WordPress Filesystem Abstraction.
WP_Filesystem() wp-admin/includes/file.php	Initializes and connects the WordPress Filesystem Abstraction classes.
WP_Posts_List_Table::inline_edit() wp-admin/includes/class-wp-posts-list-table.php	Outputs the hidden row displayed when inline editing
WP_Posts_List_Table::get_columns() wp-admin/includes/class-wp-posts-list-table.php
WP_Posts_List_Table::prepare_items() wp-admin/includes/class-wp-posts-list-table.php
get_comment_to_edit() wp-admin/includes/comment.php	Returns a WP_Comment object based on comment ID.
Custom_Image_Header::insert_attachment() wp-admin/includes/class-custom-image-header.php	Insert an attachment and its metadata.
Custom_Image_Header::ajax_header_crop() wp-admin/includes/class-custom-image-header.php	Gets attachment uploaded by Media Manager, crops it, then saves it as a new object. Returns JSON-encoded object details.
Custom_Image_Header::step_2() wp-admin/includes/class-custom-image-header.php	Display second step of custom header image page.
Custom_Image_Header::step_3() wp-admin/includes/class-custom-image-header.php	Display third step of custom header image page.
redirect_post() wp-admin/includes/post.php	Redirects to previous page.
Custom_Background::wp_set_background_image() wp-admin/includes/class-custom-background.php
WP_User::has_cap() wp-includes/class-wp-user.php	Returns whether the user has the specified capability.
WP_Role::has_cap() wp-includes/class-wp-role.php	Determines whether the role has the given capability.
WP_Customize_Manager::add_setting() wp-includes/class-wp-customize-manager.php	Adds a customize setting.
map_meta_cap() wp-includes/capabilities.php	Maps a capability to the primitive capabilities required of the given user to satisfy the capability being checked.
WP_Customize_Manager::save() wp-includes/class-wp-customize-manager.php	Handles customize_save WP Ajax request to save/update a changeset.
WP_Customize_Manager::__construct() wp-includes/class-wp-customize-manager.php	Constructor.
WP_Styles::all_deps() wp-includes/class-wp-styles.php	Determines style dependencies.
WP_Styles::_css_href() wp-includes/class-wp-styles.php	Generates an enqueued style’s fully-qualified URL.
WP_Styles::do_item() wp-includes/class-wp-styles.php	Processes a style dependency.
wp_schedule_event() wp-includes/cron.php	Schedules a recurring event.
wp_reschedule_event() wp-includes/cron.php	Reschedules a recurring event.
wp_unschedule_event() wp-includes/cron.php	Unschedule a previously scheduled event.
wp_clear_scheduled_hook() wp-includes/cron.php	Unschedules all events attached to the hook with the specified arguments.
spawn_cron() wp-includes/cron.php	Sends a request to run cron through HTTP request that doesn’t halt page loading.
wp_get_schedule() wp-includes/cron.php	Retrieve the recurrence schedule for an event.
wp_get_schedules() wp-includes/cron.php	Retrieve supported event recurrence schedules.
wp_schedule_single_event() wp-includes/cron.php	Schedules an event to run only once.
Walker_CategoryDropdown::start_el() wp-includes/class-walker-category-dropdown.php	Starts the element output.
Walker_Category::start_el() wp-includes/class-walker-category.php	Starts the element output.
get_the_term_list() wp-includes/category-template.php	Retrieves a post’s terms as a list with specified format.
the_terms() wp-includes/category-template.php	Displays the terms for a post in a list.
wp_tag_cloud() wp-includes/category-template.php	Displays a tag cloud.
wp_generate_tag_cloud() wp-includes/category-template.php	Generates a tag cloud (heatmap) from provided data.
get_the_tags() wp-includes/category-template.php	Retrieves the tags for a post.
get_the_tag_list() wp-includes/category-template.php	Retrieves the tags for a post formatted as a string.
get_the_terms() wp-includes/category-template.php	Retrieves the terms of the taxonomy that are attached to the post.
get_the_category() wp-includes/category-template.php	Retrieves post categories.
get_the_category_list() wp-includes/category-template.php	Retrieves category list for a post in either HTML list or custom format.
wp_dropdown_categories() wp-includes/category-template.php	Displays or retrieves the HTML dropdown list of categories.
wp_list_categories() wp-includes/category-template.php	Displays or retrieves the HTML list of categories.
current_theme_supports() wp-includes/theme.php	Checks a theme’s support for a given feature.
set_theme_mod() wp-includes/theme.php	Updates theme modification value for the active theme.
get_header_image() wp-includes/theme.php	Retrieves header image for custom header.
get_theme_root() wp-includes/theme.php	Retrieves path to themes directory.
get_theme_root_uri() wp-includes/theme.php	Retrieves URI for themes directory.
validate_current_theme() wp-includes/theme.php	Checks that the active theme has the required files.
get_theme_mod() wp-includes/theme.php	Retrieves theme modification value for the active theme.
get_stylesheet_directory() wp-includes/theme.php	Retrieves stylesheet directory path for the active theme.
get_stylesheet_directory_uri() wp-includes/theme.php	Retrieves stylesheet directory URI for the active theme.
get_stylesheet_uri() wp-includes/theme.php	Retrieves stylesheet URI for the active theme.
get_template() wp-includes/theme.php	Retrieves name of the active theme.
get_template_directory() wp-includes/theme.php	Retrieves template directory path for the active theme.
get_template_directory_uri() wp-includes/theme.php	Retrieves template directory URI for the active theme.
search_theme_directories() wp-includes/theme.php	Searches all registered theme directories for complete and valid themes.
get_locale_stylesheet_uri() wp-includes/theme.php	Retrieves the localized stylesheet URI.
get_stylesheet() wp-includes/theme.php	Retrieves name of the current stylesheet.
get_available_languages() wp-includes/l10n.php	Gets all available languages based on the presence of *.mo files in a given directory.
load_textdomain() wp-includes/l10n.php	Loads a .mo file into the text domain $domain.
unload_textdomain() wp-includes/l10n.php	Unloads translations for a text domain.
load_plugin_textdomain() wp-includes/l10n.php	Loads a plugin’s translated strings.
load_muplugin_textdomain() wp-includes/l10n.php	Loads the translated strings for a plugin residing in the mu-plugins directory.
load_theme_textdomain() wp-includes/l10n.php	Loads the theme’s translated strings.
translate() wp-includes/l10n.php	Retrieves the translation of $text.
translate_with_gettext_context() wp-includes/l10n.php	Retrieves the translation of $text in the context defined in $context.
_n() wp-includes/l10n.php	Translates and retrieves the singular or plural form based on the supplied number.
_nx() wp-includes/l10n.php	Translates and retrieves the singular or plural form based on the supplied number, with gettext context.
get_locale() wp-includes/l10n.php	Retrieves the current locale.
sanitize_text_field() wp-includes/formatting.php	Sanitizes a string from user input or from the database.
sanitize_mime_type() wp-includes/formatting.php	Sanitizes a mime type
sanitize_trackback_urls() wp-includes/formatting.php	Sanitizes space or carriage return separated URLs that are used to send trackbacks.
esc_textarea() wp-includes/formatting.php	Escaping for textarea values.
tag_escape() wp-includes/formatting.php	Escapes an HTML tag name.
sanitize_option() wp-includes/formatting.php	Sanitizes various option values based on the nature of the option.
wp_parse_str() wp-includes/formatting.php	Parses a string into variables to be stored in an array.
wp_sprintf() wp-includes/formatting.php	WordPress implementation of PHP sprintf() with filters.
wp_sprintf_l() wp-includes/formatting.php	Localizes list items before the rest of the content.
wp_htmledit_pre() wp-includes/deprecated.php	Formats text for the HTML editor.
esc_url() wp-includes/formatting.php	Checks and cleans a URL.
esc_js() wp-includes/formatting.php	Escapes single quotes, `"`, , `&`, and fixes line endings.
esc_html() wp-includes/formatting.php	Escaping for HTML blocks.
esc_attr() wp-includes/formatting.php	Escaping for HTML attributes.
wp_richedit_pre() wp-includes/deprecated.php	Formats text for the rich text editor.
sanitize_email() wp-includes/formatting.php	Strips out all characters that are not allowable in an email.
human_time_diff() wp-includes/formatting.php	Determines the difference between two timestamps.
wp_trim_excerpt() wp-includes/formatting.php	Generates an excerpt from the content, if needed.
wp_trim_words() wp-includes/formatting.php	Trims text to a certain number of words.
ent2ncr() wp-includes/formatting.php	Converts named entities into numbered entities.
_make_url_clickable_cb() wp-includes/formatting.php	Callback to convert URI match to HTML A element.
_make_web_ftp_clickable_cb() wp-includes/formatting.php	Callback to convert URL match to HTML A element.
translate_smiley() wp-includes/formatting.php	Converts one smiley code to the icon graphic file equivalent.
is_email() wp-includes/formatting.php	Verifies that an email is valid.
sanitize_file_name() wp-includes/formatting.php	Sanitizes a filename, replacing whitespace with dashes.
sanitize_user() wp-includes/formatting.php	Sanitizes a username, stripping out unsafe characters.
sanitize_key() wp-includes/formatting.php	Sanitizes a string key.
sanitize_title() wp-includes/formatting.php	Sanitizes a string into a slug, which can be used in URLs or HTML attributes.
sanitize_html_class() wp-includes/formatting.php	Sanitizes an HTML classname to ensure it only contains valid characters.
format_to_edit() wp-includes/formatting.php	Acts on text which is about to be edited.
get_avatar() wp-includes/pluggable.php	Retrieves the avatar `<img>` tag for a user, email address, MD5 hash, comment, or post.
wptexturize() wp-includes/formatting.php	Replaces common plain text characters with formatted entities.
wp_password_change_notification() wp-includes/pluggable.php	Notifies the blog admin of a user changing password, normally via email.
wp_new_user_notification() wp-includes/pluggable.php	Emails login credentials to a newly-registered user.
wp_nonce_tick() wp-includes/pluggable.php	Returns the time-dependent variable for nonce creation.
wp_verify_nonce() wp-includes/pluggable.php	Verifies that a correct security nonce was used with time limit.
wp_create_nonce() wp-includes/pluggable.php	Creates a cryptographic token tied to a specific action, user, user session, and window of time.
wp_check_password() wp-includes/pluggable.php	Checks the plaintext password against the encrypted Password.
wp_generate_password() wp-includes/pluggable.php	Generates a random password drawn from the defined set of characters.
wp_salt() wp-includes/pluggable.php	Returns a salt to add to hashes.
wp_redirect() wp-includes/pluggable.php	Redirects to another page.
wp_safe_redirect() wp-includes/pluggable.php	Performs a safe (local) redirect, using wp_redirect() .
wp_validate_redirect() wp-includes/pluggable.php	Validates a URL for use in a redirect.
wp_notify_postauthor() wp-includes/pluggable.php	Notifies an author (and/or others) of a comment/trackback/pingback on a post.
wp_notify_moderator() wp-includes/pluggable.php	Notifies the moderator of the site about a new comment that is awaiting approval.
wp_set_auth_cookie() wp-includes/pluggable.php	Sets the authentication cookies based on user ID.
wp_clear_auth_cookie() wp-includes/pluggable.php	Removes all of the cookies associated with authentication.
auth_redirect() wp-includes/pluggable.php	Checks if a user is logged in, if not it redirects them to the login page.
wp_authenticate() wp-includes/pluggable.php	Authenticates a user, confirming the login credentials are valid.
wp_generate_auth_cookie() wp-includes/pluggable.php	Generates authentication cookie contents.
wp_mail() wp-includes/pluggable.php	Sends an email, similar to PHP’s mail function.
the_search_query() wp-includes/general-template.php	Displays the contents of the search query variable.
paginate_links() wp-includes/general-template.php	Retrieves paginated links for archive post pages.
wp_admin_css_uri() wp-includes/general-template.php	Displays the URL of a WordPress admin CSS file.
wp_admin_css() wp-includes/general-template.php	Enqueues or directly prints a stylesheet link to the specified CSS file.
wp_generator() wp-includes/general-template.php	Displays the XHTML generator that is generated on the wp_head hook.
the_generator() wp-includes/general-template.php	Displays the generator XML or Comment for RSS, ATOM, etc.
get_the_generator() wp-includes/general-template.php	Creates the generator XML or Comment for RSS, ATOM, etc.
feed_links() wp-includes/general-template.php	Displays the links to the general feeds.
feed_links_extra() wp-includes/general-template.php	Displays the links to the extra feeds such as category feeds.
user_can_richedit() wp-includes/general-template.php	Determines whether the user can access the visual editor.
wp_default_editor() wp-includes/general-template.php	Finds out which editor should be displayed by default.
get_search_query() wp-includes/general-template.php	Retrieves the contents of the search WordPress query variable.
get_the_modified_date() wp-includes/general-template.php	Retrieves the date on which the post was last modified.
the_time() wp-includes/general-template.php	Displays the time at which the post was written.
get_the_time() wp-includes/general-template.php	Retrieves the time at which the post was written.
get_post_time() wp-includes/general-template.php	Retrieves the time at which the post was written.
the_modified_time() wp-includes/general-template.php	Displays the time at which the post was last modified.
get_the_modified_time() wp-includes/general-template.php	Retrieves the time at which the post was last modified.
get_post_modified_time() wp-includes/general-template.php	Retrieves the time at which the post was last modified.
the_weekday() wp-includes/general-template.php	Displays the weekday on which the post was written.
the_weekday_date() wp-includes/general-template.php	Displays the weekday on which the post was written.
get_archives_link() wp-includes/general-template.php	Retrieves archive link content based on predefined or custom code.
wp_get_archives() wp-includes/general-template.php	Displays archive links based on type and format.
get_calendar() wp-includes/general-template.php	Displays calendar with days that have posts as links.
the_date() wp-includes/general-template.php	Displays or retrieves the date the current post was written (once per date)
get_the_date() wp-includes/general-template.php	Retrieves the date on which the post was written.
the_modified_date() wp-includes/general-template.php	Displays the date on which the post was last modified.
single_post_title() wp-includes/general-template.php	Displays or retrieves page title for post.
post_type_archive_title() wp-includes/general-template.php	Displays or retrieves title for a post type archive.
single_term_title() wp-includes/general-template.php	Displays or retrieves page title for taxonomy term archive.
get_bloginfo() wp-includes/general-template.php	Retrieves information about the current site.
wp_title() wp-includes/general-template.php	Displays or retrieves page title for all areas of blog.
wp_loginout() wp-includes/general-template.php	Displays the Log In/Out link.
wp_logout_url() wp-includes/general-template.php	Retrieves the logout URL.
wp_login_url() wp-includes/general-template.php	Retrieves the login URL.
wp_registration_url() wp-includes/general-template.php	Returns the URL that allows the user to register on the site.
wp_login_form() wp-includes/general-template.php	Provides a simple login form for use anywhere within WordPress.
wp_lostpassword_url() wp-includes/general-template.php	Returns the URL that allows the user to reset the lost password.
wp_register() wp-includes/general-template.php	Displays the Registration or Admin link.
get_search_form() wp-includes/general-template.php	Displays search form.
get_theme_data() wp-includes/deprecated.php	Retrieve theme data from parsed theme file.
get_boundary_post_rel_link() wp-includes/deprecated.php	Get boundary post relational link.
get_index_rel_link() wp-includes/deprecated.php	Get site index relational link.
get_parent_post_rel_link() wp-includes/deprecated.php	Get parent post relational link.
get_attachment_icon_src() wp-includes/deprecated.php	Retrieve icon URL and Path.
get_attachment_icon() wp-includes/deprecated.php	Retrieve HTML content of icon attachment image element.
get_attachment_innerHTML() wp-includes/deprecated.php	Retrieve HTML content of image element.
the_content_rss() wp-includes/deprecated.php	Display the post content for the feed.
get_links_list() wp-includes/deprecated.php	Output entire list of links by category.
safecss_filter_attr() wp-includes/kses.php	Filters an inline style attribute and removes disallowed rules.
previous_post() wp-includes/deprecated.php	Prints a link to the previous post.
next_post() wp-includes/deprecated.php	Prints link to the next post.
WP_Theme::get_allowed() wp-includes/class-wp-theme.php	Returns array of stylesheet names of themes allowed on the site or network.
WP_Theme::get_allowed_on_network() wp-includes/class-wp-theme.php	Returns array of stylesheet names of themes allowed on the network.
WP_Theme::get_allowed_on_site() wp-includes/class-wp-theme.php	Returns array of stylesheet names of themes allowed on the site.
wp_kses_allowed_html() wp-includes/kses.php	Returns an array of allowed HTML tags and attributes for a given context.
wp_kses_hook() wp-includes/kses.php	You add any KSES hooks here.
WP_Theme::get_page_templates() wp-includes/class-wp-theme.php	Returns the theme’s post templates for a given post type.
WP_Theme::scandir() wp-includes/class-wp-theme.php	Scans a directory for files of a certain extension.
WP_Theme::__construct() wp-includes/class-wp-theme.php	Constructor for WP_Theme.
WP::handle_404() wp-includes/class-wp.php	Set the Headers for 404, if nothing is found for requested URL.
wp_is_mobile() wp-includes/vars.php	Test if the current browser runs on a mobile device (smart phone, tablet, etc.)
WP::parse_request() wp-includes/class-wp.php	Parses the request to find the correct WordPress query.
WP::send_headers() wp-includes/class-wp.php	Sends additional HTTP headers for caching, content type, etc.
WP_Query::get_posts() wp-includes/class-wp-query.php	Retrieves an array of posts based on query variables.
WP_Query::parse_search() wp-includes/class-wp-query.php	Generates SQL for the WHERE clause based on passed search terms.
WP_Query::get_search_stopwords() wp-includes/class-wp-query.php	Retrieve stopwords used when parsing search terms.
wp_old_slug_redirect() wp-includes/query.php	Redirect old slugs to the correct permalink.
get_tags() wp-includes/category.php	Retrieves all post tags.
WP_Image_Editor_Imagick::_save() wp-includes/class-wp-image-editor-imagick.php
get_categories() wp-includes/category.php	Retrieves a list of category objects.
wp_start_object_cache() wp-includes/load.php	Start the WordPress object cache.
wp_debug_mode() wp-includes/load.php	Set PHP error reporting based on WordPress debug settings.
WP_Http_Cookie::getHeaderValue() wp-includes/class-wp-http-cookie.php	Convert cookie name and value back to header string.
WP_Http_Encoding::accept_encoding() wp-includes/class-wp-http-encoding.php	What encoding types to accept and their priority values.
WP_HTTP_Proxy::send_through_proxy() wp-includes/class-wp-http-proxy.php	Determines whether the request should be sent through a proxy.
WP_Http_Curl::test() wp-includes/class-wp-http-curl.php	Determines whether this class can be used for retrieving a URL.
WP_Http::block_request() wp-includes/class-wp-http.php	Determines whether an HTTP API request to the given URL should be blocked.
WP_Http_Streams::request() wp-includes/class-wp-http-streams.php	Send a HTTP request to a URI using PHP Streams.
WP_Http_Streams::test() wp-includes/class-wp-http-streams.php	Determines whether this class can be used for retrieving a URL.
WP_Http_Curl::request() wp-includes/class-wp-http-curl.php	Send a HTTP request to a URI using cURL extension.
WP_Http::_get_first_available_transport() wp-includes/class-wp-http.php	Tests which transports are capable of supporting the request.
WP_Http::_dispatch_request() wp-includes/class-wp-http.php	Dispatches a HTTP request to a supporting transport.
WP_Http::request() wp-includes/class-wp-http.php	Send an HTTP request to a URI.
wp_allowed_protocols() wp-includes/functions.php	Retrieves a list of protocols to allow in HTML attributes.
wp_checkdate() wp-includes/functions.php	Tests if the supplied date is valid for the Gregorian calendar.
wp_auth_check_load() wp-includes/functions.php	Loads the auth check for monitoring whether the user is still logged in.
wp_auth_check_html() wp-includes/functions.php	Outputs the HTML that shows the wp-login dialog when the user is no longer logged in.
get_file_data() wp-includes/functions.php	Retrieves metadata from a file.
_deprecated_function() wp-includes/functions.php	Marks a function as deprecated and inform when it has been used.
_deprecated_file() wp-includes/functions.php	Marks a file as deprecated and inform when it has been used.
_deprecated_argument() wp-includes/functions.php	Marks a function argument as deprecated and inform when it has been used.
_doing_it_wrong() wp-includes/functions.php	Marks something as being incorrectly called.
iis7_supports_permalinks() wp-includes/functions.php	Checks if IIS 7+ supports pretty permalinks.
wp_maybe_load_widgets() wp-includes/functions.php	Determines if Widgets library should be loaded.
smilies_init() wp-includes/functions.php	Converts smiley code to the icon graphic file equivalent.
wp_upload_bits() wp-includes/functions.php	Creates a file in the upload folder with given content.
wp_check_filetype_and_ext() wp-includes/functions.php	Attempts to determine the real file type of a file.
wp_get_mime_types() wp-includes/functions.php	Retrieves the list of mime types and file extensions.
get_allowed_mime_types() wp-includes/functions.php	Retrieves the list of allowed mime types and file extensions.
wp_die() wp-includes/functions.php	Kills WordPress execution and displays HTML page with an error message.
do_robots() wp-includes/functions.php	Displays the default robots.txt file content.
wp_upload_dir() wp-includes/functions.php	Returns an array containing the current upload directory’s path and URL.
wp_unique_filename() wp-includes/functions.php	Gets a filename that is sanitized and unique for the given directory.
status_header() wp-includes/functions.php	Sets HTTP status header.
wp_get_nocache_headers() wp-includes/functions.php	Gets the header information to prevent caching.
number_format_i18n() wp-includes/functions.php	Converts float number to format based on the locale.
do_enclose() wp-includes/functions.php	Checks content for video and audio links to add as enclosures.
date_i18n() wp-includes/functions.php	Retrieves the date in localized format, based on a sum of Unix timestamp and timezone offset in seconds.
WP_Nav_Menu_Widget::widget() wp-includes/widgets/class-wp-nav-menu-widget.php	Outputs the content for the current Navigation Menu widget instance.
WP_Widget_Tag_Cloud::widget() wp-includes/widgets/class-wp-widget-tag-cloud.php	Outputs the content for the current Tag Cloud widget instance.
WP_Widget_RSS::widget() wp-includes/widgets/class-wp-widget-rss.php	Outputs the content for the current RSS widget instance.
WP_Widget_Recent_Comments::recent_comments_style() wp-includes/widgets/class-wp-widget-recent-comments.php	Outputs the default styles for the Recent Comments widget.
WP_Widget_Recent_Comments::widget() wp-includes/widgets/class-wp-widget-recent-comments.php	Outputs the content for the current Recent Comments widget instance.
WP_Widget_Recent_Posts::widget() wp-includes/widgets/class-wp-widget-recent-posts.php	Outputs the content for the current Recent Posts widget instance.
WP_Widget_Categories::widget() wp-includes/widgets/class-wp-widget-categories.php	Outputs the content for the current Categories widget instance.
WP_Widget_Text::widget() wp-includes/widgets/class-wp-widget-text.php	Outputs the content for the current Text widget instance.
WP_Widget_Text::form() wp-includes/widgets/class-wp-widget-text.php	Outputs the Text widget settings form.
WP_Widget_Calendar::widget() wp-includes/widgets/class-wp-widget-calendar.php	Outputs the content for the current Calendar widget instance.
WP_Widget_Meta::widget() wp-includes/widgets/class-wp-widget-meta.php	Outputs the content for the current Meta widget instance.
WP_Widget_Archives::widget() wp-includes/widgets/class-wp-widget-archives.php	Outputs the content for the current Archives widget instance.
WP_Widget_Search::widget() wp-includes/widgets/class-wp-widget-search.php	Outputs the content for the current Search widget instance.
WP_Widget_Links::widget() wp-includes/widgets/class-wp-widget-links.php	Outputs the content for the current Links widget instance.
WP_Widget_Pages::widget() wp-includes/widgets/class-wp-widget-pages.php	Outputs the content for the current Pages widget instance.
WP_Embed::cache_oembed() wp-includes/class-wp-embed.php	Triggers a caching of all oEmbed results.
WP_Embed::maybe_make_link() wp-includes/class-wp-embed.php	Conditionally makes a hyperlink based on an internal class variable.
WP_Embed::shortcode() wp-includes/class-wp-embed.php	The do_shortcode() callback function.
WP_Feed_Cache_Transient::__construct() wp-includes/class-wp-feed-cache-transient.php	Constructor.
_update_post_term_count() wp-includes/taxonomy.php	Updates term count based on object types of the current taxonomy.
get_term_link() wp-includes/taxonomy.php	Generates a permalink for a taxonomy term archive.
get_ancestors() wp-includes/taxonomy.php	Gets an array of ancestor IDs for a given object.
wp_unique_term_slug() wp-includes/taxonomy.php	Makes term slug unique, if it isn’t already.
wp_update_term() wp-includes/taxonomy.php	Updates term based on arguments provided.
wp_get_object_terms() wp-includes/taxonomy.php	Retrieves the terms associated with the given object(s), in the supplied taxonomies.
wp_insert_term() wp-includes/taxonomy.php	Adds a new term to the database.
term_exists() wp-includes/taxonomy.php	Determines whether a taxonomy term exists.
sanitize_term_field() wp-includes/taxonomy.php	Sanitizes the field value in the term based on the context.
get_terms() wp-includes/taxonomy.php	Retrieves the terms in a given taxonomy or list of taxonomies.
create_initial_taxonomies() wp-includes/taxonomy.php	Creates the initial taxonomies.
get_taxonomy_labels() wp-includes/taxonomy.php	Builds an object with all taxonomy labels out of a taxonomy object.
get_term() wp-includes/taxonomy.php	Gets all term data from database by term ID.
self_admin_url() wp-includes/link-template.php	Retrieves the URL to the admin area for either the current site or the network depending on context.
set_url_scheme() wp-includes/link-template.php	Sets the scheme for a URL.
get_dashboard_url() wp-includes/link-template.php	Retrieves the URL to the user’s dashboard.
get_edit_profile_url() wp-includes/link-template.php	Retrieves the URL to the user’s profile editor.
wp_get_shortlink() wp-includes/link-template.php	Returns a shortlink for a post, page, attachment, or site.
the_shortlink() wp-includes/link-template.php	Displays the shortlink for a post.
get_admin_url() wp-includes/link-template.php	Retrieves the URL to the admin area for a given site.
includes_url() wp-includes/link-template.php	Retrieves the URL to the includes directory.
content_url() wp-includes/link-template.php	Retrieves the URL to the content directory.
plugins_url() wp-includes/link-template.php	Retrieves a URL within the plugins or mu-plugins directory.
network_site_url() wp-includes/link-template.php	Retrieves the site URL for the current network.
network_home_url() wp-includes/link-template.php	Retrieves the home URL for the current network.
network_admin_url() wp-includes/link-template.php	Retrieves the URL to the admin area for the network.
user_admin_url() wp-includes/link-template.php	Retrieves the URL to the admin area for the current user.
get_comments_pagenum_link() wp-includes/link-template.php	Retrieves the comments page number link.
get_next_comments_link() wp-includes/link-template.php	Retrieves the link to the next comments page.
get_previous_comments_link() wp-includes/link-template.php	Retrieves the link to the previous comments page.
get_home_url() wp-includes/link-template.php	Retrieves the URL for a given site where the front end is accessible.
get_site_url() wp-includes/link-template.php	Retrieves the URL for a given site where WordPress application files (e.g. wp-blog-header.php or the wp-admin/ folder) are accessible.
get_shortcut_link() wp-includes/deprecated.php	Retrieves the Press This bookmarklet link.
get_adjacent_post_link() wp-includes/link-template.php	Retrieves the adjacent post link.
get_pagenum_link() wp-includes/link-template.php	Retrieves the link for a page number.
get_next_posts_link() wp-includes/link-template.php	Retrieves the next posts page link.
get_previous_posts_link() wp-includes/link-template.php	Retrieves the previous posts page link.
get_edit_user_link() wp-includes/link-template.php	Retrieves the edit user link.
get_adjacent_post() wp-includes/link-template.php	Retrieves the adjacent post.
get_adjacent_post_rel_link() wp-includes/link-template.php	Retrieves the adjacent post relational link.
get_search_comments_feed_link() wp-includes/link-template.php	Retrieves the permalink for the search results comments feed.
get_post_type_archive_link() wp-includes/link-template.php	Retrieves the permalink for a post type archive.
get_post_type_archive_feed_link() wp-includes/link-template.php	Retrieves the permalink for a post type archive feed.
get_edit_post_link() wp-includes/link-template.php	Retrieves the edit post link for post.
edit_post_link() wp-includes/link-template.php	Displays the edit post link for post.
get_delete_post_link() wp-includes/link-template.php	Retrieves the delete posts link for post.
get_edit_comment_link() wp-includes/link-template.php	Retrieves the edit comment link.
edit_comment_link() wp-includes/link-template.php	Displays the edit comment link with formatting.
get_edit_bookmark_link() wp-includes/link-template.php	Displays the edit bookmark link.
edit_bookmark_link() wp-includes/link-template.php	Displays the edit bookmark link anchor content.
get_term_feed_link() wp-includes/link-template.php	Retrieves the feed link for a term.
get_edit_tag_link() wp-includes/link-template.php	Retrieves the edit link for a tag.
edit_tag_link() wp-includes/link-template.php	Displays or retrieves the edit link for a tag with formatting.
get_edit_term_link() wp-includes/link-template.php	Retrieves the URL for editing a given term.
edit_term_link() wp-includes/link-template.php	Displays or retrieves the edit term link with formatting.
get_search_link() wp-includes/link-template.php	Retrieves the permalink for a search.
get_search_feed_link() wp-includes/link-template.php	Retrieves the permalink for the search results feed.
get_month_link() wp-includes/link-template.php	Retrieves the permalink for the month archives with year.
get_day_link() wp-includes/link-template.php	Retrieves the permalink for the day archives with year and month.
the_feed_link() wp-includes/link-template.php	Displays the permalink for the feed type.
get_feed_link() wp-includes/link-template.php	Retrieves the permalink for the feed type.
get_post_comments_feed_link() wp-includes/link-template.php	Retrieves the permalink for the post comments feed.
post_comments_feed_link() wp-includes/link-template.php	Displays the comment feed link for a post.
get_author_feed_link() wp-includes/link-template.php	Retrieves the feed link for a given author.
get_permalink() wp-includes/link-template.php	Retrieves the full permalink for the current post or post ID.
get_post_permalink() wp-includes/link-template.php	Retrieves the permalink for a post of a custom post type.
get_page_link() wp-includes/link-template.php	Retrieves the permalink for the current page or page ID.
_get_page_link() wp-includes/link-template.php	Retrieves the page permalink.
get_attachment_link() wp-includes/link-template.php	Retrieves the permalink for an attachment.
get_year_link() wp-includes/link-template.php	Retrieves the permalink for the year archives.
the_permalink() wp-includes/link-template.php	Displays the permalink for the current post.
user_trailingslashit() wp-includes/link-template.php	Retrieves a trailing-slashed string if the site is set for adding trailing slashes.
is_allowed_http_origin() wp-includes/http.php	Determines if the HTTP origin is an authorized one.
wp_http_validate_url() wp-includes/http.php	Validate a URL for safe use in the HTTP API.
wp_version_check() wp-includes/update.php	Checks WordPress version against the newest version.
wp_update_plugins() wp-includes/update.php	Checks for available updates to plugins based on the latest versions hosted on WordPress.org.
wp_update_themes() wp-includes/update.php	Checks for available updates to themes based on the latest versions hosted on WordPress.org.
wp_get_update_data() wp-includes/update.php	Collects counts and UI strings for available updates.
get_http_origin() wp-includes/http.php	Get the HTTP Origin of the current request.
get_allowed_http_origins() wp-includes/http.php	Retrieve list of allowed HTTP origins.
WP_Date_Query::validate_column() wp-includes/class-wp-date-query.php	Validates a column name parameter.
WP_Date_Query::get_sql() wp-includes/class-wp-date-query.php	Generates WHERE clause to be appended to a main query.
do_shortcode_tag() wp-includes/shortcodes.php	Regular Expression callable for do_shortcode() for calling shortcode hook.
shortcode_atts() wp-includes/shortcodes.php	Combines user attributes with known attributes and fill in defaults when needed.
strip_shortcodes() wp-includes/shortcodes.php	Removes all shortcode tags from the given content.
WP_Image_Editor::set_quality() wp-includes/class-wp-image-editor.php	Sets Image Compression quality on a 1-100% scale.
WP_Image_Editor::get_output_format() wp-includes/class-wp-image-editor.php	Returns preferred mime-type and extension based on provided file’s extension and mime, or current file’s extension and mime.
WP_oEmbed::__construct() wp-includes/class-wp-oembed.php	Constructor.
WP_oEmbed::get_html() wp-includes/class-wp-oembed.php	The do-it-all function that takes a URL and attempts to return the HTML.
WP_oEmbed::discover() wp-includes/class-wp-oembed.php	Attempts to discover link tags at the given URL for an oEmbed provider.
WP_oEmbed::fetch() wp-includes/class-wp-oembed.php	Connects to a oEmbed provider and returns the result.
WP_oEmbed::_fetch_with_format() wp-includes/class-wp-oembed.php	Fetches result from an oEmbed provider for a specific format and complete provider URL
WP_oEmbed::data2html() wp-includes/class-wp-oembed.php	Converts a data object from WP_oEmbed::fetch() and returns the HTML.
wp_admin_bar_my_sites_menu() wp-includes/admin-bar.php	Adds the “My Sites/[Site Name]” menu and all submenus.
is_admin_bar_showing() wp-includes/admin-bar.php	Determines whether the admin bar should be showing.
_wp_admin_bar_init() wp-includes/admin-bar.php	Instantiates the admin bar object and set it up as a global for access elsewhere.
get_the_category_rss() wp-includes/feed.php	Retrieves all of the post categories, formatted for use in feeds.
rss_enclosure() wp-includes/feed.php	Displays the rss enclosure for the current post.
atom_enclosure() wp-includes/feed.php	Displays the atom enclosure for the current post.
self_link() wp-includes/feed.php	Displays the link for the currently displayed feed in a XSS safe way.
feed_content_type() wp-includes/feed.php	Returns the content type for specified feed type.
fetch_feed() wp-includes/feed.php	Builds SimplePie object based on RSS or Atom feed from URL.
get_the_content_feed() wp-includes/feed.php	Retrieves the post content for feeds.
the_excerpt_rss() wp-includes/feed.php	Displays the post excerpt for the feed.
the_permalink_rss() wp-includes/feed.php	Displays the permalink to the post for use in feeds.
comments_link_feed() wp-includes/feed.php	Outputs the link to the comments for the current post in an XML safe way.
comment_link() wp-includes/feed.php	Displays the link to the comments.
get_comment_author_rss() wp-includes/feed.php	Retrieves the current comment author for use in the feeds.
comment_text_rss() wp-includes/feed.php	Displays the current comment content for use in the feeds.
get_bloginfo_rss() wp-includes/feed.php	Retrieves RSS container for the bloginfo function.
bloginfo_rss() wp-includes/feed.php	Displays RSS container for the bloginfo function.
get_default_feed() wp-includes/feed.php	Retrieves the default feed.
get_wp_title_rss() wp-includes/feed.php	Retrieves the blog title for the feed title.
wp_title_rss() wp-includes/feed.php	Displays the blog title for display of the feed title.
get_the_title_rss() wp-includes/feed.php	Retrieves the current post title for the feed.
WP_Customize_Setting::value() wp-includes/class-wp-customize-setting.php	Fetch the value of the setting.
WP_Customize_Setting::js_value() wp-includes/class-wp-customize-setting.php	Sanitize the setting’s value for use in JavaScript.
WP_Customize_Setting::sanitize() wp-includes/class-wp-customize-setting.php	Sanitize an input.
set_site_transient() wp-includes/option.php	Sets/updates the value of a site transient.
get_site_transient() wp-includes/option.php	Retrieves the value of a site transient.
get_transient() wp-includes/option.php	Retrieves the value of a transient.
set_transient() wp-includes/option.php	Sets/updates the value of a transient.
wp_load_alloptions() wp-includes/option.php	Loads and caches all autoloaded options, if available or all options.
update_option() wp-includes/option.php	Updates the value of an option that was already added.
add_option() wp-includes/option.php	Adds a new option.
get_option() wp-includes/option.php	Retrieves an option value based on an option name.
WP_User_Query::prepare_query() wp-includes/class-wp-user-query.php	Prepares the query variables.
WP_User_Query::query() wp-includes/class-wp-user-query.php	Executes the query, with the current variables.
wp_update_user() wp-includes/user.php	Updates a user in the database.
wp_get_user_contact_methods() wp-includes/user.php	Sets up the user contact methods.
check_password_reset_key() wp-includes/user.php	Retrieves a user row based on password reset key and login.
register_new_user() wp-includes/user.php	Handles registering a new user.
username_exists() wp-includes/user.php	Determines whether the given username exists.
email_exists() wp-includes/user.php	Determines whether the given email exists.
validate_username() wp-includes/user.php	Checks whether a username is valid.
wp_insert_user() wp-includes/user.php	Inserts a user into the database.
get_blogs_of_user() wp-includes/user.php	Gets the sites a user belongs to.
count_users() wp-includes/user.php	Counts number of users who have each of the user roles.
wp_dropdown_users() wp-includes/user.php	Creates dropdown HTML content of users.
sanitize_user_field() wp-includes/user.php	Sanitizes user field based on context.
wp_signon() wp-includes/user.php	Authenticates and logs a user in with ‘remember’ capability.
wp_authenticate_username_password() wp-includes/user.php	Authenticates a user, confirming the username and password are valid.
wp_authenticate_spam_check() wp-includes/user.php	For Multisite blogs, checks if the authenticated user has been marked as a spammer, or if the user’s primary blog has been marked as spam.
count_user_posts() wp-includes/user.php	Gets the number of posts a user has written.
get_user_option() wp-includes/user.php	Retrieves user option that can be either per Site or per Network.
wp_list_bookmarks() wp-includes/bookmark-template.php	Retrieves or echoes all of the bookmarks.
get_query_template() wp-includes/template.php	Retrieves path to a template.
WP_Image_Editor_GD::_save() wp-includes/class-wp-image-editor-gd.php
Walker_Nav_Menu::start_el() wp-includes/class-walker-nav-menu.php	Starts the element output.
has_post_thumbnail() wp-includes/post-thumbnail-template.php	Determines whether a post has an image attached.
get_post_thumbnail_id() wp-includes/post-thumbnail-template.php	Retrieves the post thumbnail ID.
get_the_post_thumbnail() wp-includes/post-thumbnail-template.php	Retrieves the post thumbnail.
Walker_Nav_Menu::start_lvl() wp-includes/class-walker-nav-menu.php	Starts the list before the elements are added.
Walker_PageDropdown::start_el() wp-includes/class-walker-page-dropdown.php	Starts the element output.
wp_nav_menu() wp-includes/nav-menu-template.php	Displays a navigation menu.
Walker_Page::start_el() wp-includes/class-walker-page.php	Outputs the beginning of the current element in the tree.
wp_get_attachment_link() wp-includes/post-template.php	Retrieves an attachment page link using an image or icon, if possible.
prepend_attachment() wp-includes/post-template.php	Wraps attachment in paragraph tag before content.
get_the_password_form() wp-includes/post-template.php	Retrieves protected post password form content.
wp_post_revision_title_expanded() wp-includes/post-template.php	Retrieves formatted date timestamp of a revision (linked to that revisions’s page).
post_password_required() wp-includes/post-template.php	Determines whether the post requires password and whether a correct password has been provided.
wp_link_pages() wp-includes/post-template.php	The formatted output of a list of pages.
wp_dropdown_pages() wp-includes/post-template.php	Retrieves or displays a list of pages as a dropdown (select list).
wp_list_pages() wp-includes/post-template.php	Retrieves or displays a list of pages (or hierarchical post type items) in list (li) format.
wp_page_menu() wp-includes/post-template.php	Displays or retrieves a list of pages with an optional home link.
get_the_guid() wp-includes/post-template.php	Retrieves the Post Global Unique Identifier (guid).
the_content() wp-includes/post-template.php	Displays the post content.
get_the_content() wp-includes/post-template.php	Retrieves the post content.
the_excerpt() wp-includes/post-template.php	Displays the post excerpt.
get_the_excerpt() wp-includes/post-template.php	Retrieves the post excerpt.
get_body_class() wp-includes/post-template.php	Retrieves an array of the class names for the body element.
get_post_class() wp-includes/post-template.php	Retrieves an array of the class names for the post container element.
get_the_title() wp-includes/post-template.php	Retrieves the post title.
the_guid() wp-includes/post-template.php	Displays the Post Global Unique Identifier (guid).
get_media_embedded_in_content() wp-includes/media.php	Checks the HTML content for a audio, video, object, embed, or iframe tags.
get_post_galleries() wp-includes/media.php	Retrieves galleries from the passed post’s content.
get_post_gallery() wp-includes/media.php	Checks a specified post’s content for gallery and, if present, return the first
wp_max_upload_size() wp-includes/media.php	Determines the maximum upload size allowed in php.ini.
wp_get_image_editor() wp-includes/media.php	Returns a WP_Image_Editor instance and loads file into it.
wp_plupload_default_settings() wp-includes/media.php	Prints default Plupload arguments.
wp_prepare_attachment_for_js() wp-includes/media.php	Prepares an attachment post object for JS, where it is expected to be JSON-encoded and fit into an Attachment model.
wp_enqueue_media() wp-includes/media.php	Enqueues all scripts, styles, settings, and templates necessary to use all media JS APIs.
get_attached_media() wp-includes/media.php	Retrieves media attached to the passed post.
wp_embed_defaults() wp-includes/embed.php	Creates default array of embed parameters.
wp_maybe_load_embeds() wp-includes/embed.php	Determines if default embed handlers should be loaded.
wp_embed_handler_audio() wp-includes/embed.php	Audio embed handler callback.
wp_embed_handler_video() wp-includes/embed.php	Video embed handler callback.
wp_get_video_extensions() wp-includes/media.php	Returns a filtered list of supported video formats.
wp_video_shortcode() wp-includes/media.php	Builds the Video shortcode output.
gallery_shortcode() wp-includes/media.php	Builds the Gallery shortcode output.
wp_playlist_shortcode() wp-includes/media.php	Builds the Playlist shortcode output.
wp_mediaelement_fallback() wp-includes/media.php	Provides a No-JS Flash fallback as a last resort for audio / video.
wp_get_audio_extensions() wp-includes/media.php	Returns a filtered list of supported audio formats.
wp_get_attachment_id3_keys() wp-includes/media.php	Returns useful keys to use to lookup data from an attachment’s stored metadata.
wp_audio_shortcode() wp-includes/media.php	Builds the Audio shortcode output.
get_image_tag() wp-includes/media.php	Gets an img tag for an image attachment, scaling it down if requested.
wp_constrain_dimensions() wp-includes/media.php	Calculates the new dimensions for a down-sampled image.
image_resize_dimensions() wp-includes/media.php	Retrieves calculated resize dimensions for use in WP_Image_Editor.
image_get_intermediate_size() wp-includes/media.php	Retrieves the image’s intermediate size (resized) path, width, and height.
get_intermediate_image_sizes() wp-includes/media.php	Gets the available intermediate image size names.
wp_get_attachment_image_src() wp-includes/media.php	Retrieves an image to represent an attachment.
wp_get_attachment_image() wp-includes/media.php	Gets an HTML img element representing an image attachment.
img_caption_shortcode() wp-includes/media.php	Builds the Caption shortcode output.
image_downsize() wp-includes/media.php	Scales an image to fit a particular size (such as ‘thumb’ or ‘medium’).
image_constrain_size_for_editor() wp-includes/media.php	Scales down the default size of an image.
wp_mime_type_icon() wp-includes/post.php	Retrieves the icon for a MIME type or attachment.
get_lastpostdate() wp-includes/post.php	Retrieves the most recent time that a post on the site was published.
get_lastpostmodified() wp-includes/post.php	Gets the most recent time that a post on the site was modified.
wp_delete_attachment() wp-includes/post.php	Trashes or deletes an attachment.
wp_get_attachment_metadata() wp-includes/post.php	Retrieves attachment metadata for attachment ID.
wp_update_attachment_metadata() wp-includes/post.php	Updates metadata for an attachment.
wp_get_attachment_url() wp-includes/post.php	Retrieves the URL for an attachment.
wp_get_attachment_thumb_url() wp-includes/post.php	Retrieves URL for an attachment thumbnail.
wp_get_attachment_thumb_file() wp-includes/deprecated.php	Retrieves thumbnail for an attachment.
get_enclosed() wp-includes/post.php	Retrieves enclosures already enclosed for a post.
get_pung() wp-includes/post.php	Retrieves URLs already pinged for a post.
get_to_ping() wp-includes/post.php	Retrieves URLs that need to be pinged.
get_page_uri() wp-includes/post.php	Builds the URI path for a page.
get_pages() wp-includes/post.php	Retrieves an array of pages (or hierarchical post type items).
wp_unique_post_slug() wp-includes/post.php	Computes a unique slug for the post, when given the desired slug and some post details.
wp_set_post_categories() wp-includes/post.php	Sets categories for a post.
add_ping() wp-includes/post.php	Adds a URL to those already pinged.
wp_insert_post() wp-includes/post.php	Inserts or update a post.
get_post_mime_types() wp-includes/post.php	Gets default post mime types.
wp_delete_post() wp-includes/post.php	Trashes or deletes a post or page.
wp_trash_post() wp-includes/post.php	Moves a post or page to the Trash
wp_untrash_post() wp-includes/post.php	Restores a post from the Trash.
wp_count_posts() wp-includes/post.php	Counts number of posts of a post type and if user has permissions to view.
wp_count_attachments() wp-includes/post.php	Counts number of attachments for the mime type(s).
is_sticky() wp-includes/post.php	Determines whether a post is sticky.
sanitize_post_field() wp-includes/post.php	Sanitizes a post field based on context.
get_post_type_labels() wp-includes/post.php	Builds an object with all post type labels out of a post type object.
get_post_status() wp-includes/post.php	Retrieves the post status based on the post ID.
get_attached_file() wp-includes/post.php	Retrieves attached file path based on attachment ID.
update_attached_file() wp-includes/post.php	Updates attachment file path based on attachment ID.
_wp_relative_upload_path() wp-includes/post.php	Returns relative path to an uploaded file.
WP_Rewrite::mod_rewrite_rules() wp-includes/class-wp-rewrite.php	Retrieves mod_rewrite-formatted rewrite rules to write to .htaccess.
WP_Rewrite::iis7_url_rewrite_rules() wp-includes/class-wp-rewrite.php	Retrieves IIS7 URL Rewrite formatted rewrite rules to write to web.config file.
WP_Rewrite::flush_rules() wp-includes/class-wp-rewrite.php	Removes rewrite rules and then recreate rewrite rules.
WP_Rewrite::rewrite_rules() wp-includes/class-wp-rewrite.php	Constructs rewrite matches and queries from permalink structure.
url_to_postid() wp-includes/rewrite.php	Examines a URL and try to determine the post ID it represents.
redirect_canonical() wp-includes/canonical.php	Redirects incoming links to the proper URL based on the site url.
redirect_guess_404_permalink() wp-includes/canonical.php	Attempts to guess the correct URL for a 404 request based on query vars.
wp_revisions_to_keep() wp-includes/revision.php	Determines how many revisions to retain for a given post.
_wp_post_revision_fields() wp-includes/revision.php	Determines which fields of posts are to be saved in revisions.
wp_save_post_revision() wp-includes/revision.php	Creates a revision for the current version of a post.
get_space_used() wp-includes/ms-functions.php	Returns the space used by the current site.
get_space_allowed() wp-includes/ms-functions.php	Returns the upload quota for the current blog.
wp_is_large_network() wp-includes/ms-functions.php	Determines whether or not we have a large network.
wp_maybe_update_network_site_counts() wp-includes/ms-functions.php	Updates the count of sites for the current network.
wp_maybe_update_network_user_counts() wp-includes/ms-functions.php	Updates the network-wide users count.
wpmu_welcome_user_notification() wp-includes/ms-functions.php	Notifies a user that their account activation has been successful.
maybe_redirect_404() wp-includes/ms-functions.php	Corrects 404 redirects when NOBLOGREDIRECT is defined.
recurse_dirsize() wp-includes/functions.php	Gets the size of a directory recursively.
newblog_notify_siteadmin() wp-includes/ms-functions.php	Notifies the network admin that a new site has been activated.
newuser_notify_siteadmin() wp-includes/ms-functions.php	Notifies the network admin that a new user has been activated.
domain_exists() wp-includes/ms-functions.php	Checks whether a site name is already taken.
wpmu_welcome_notification() wp-includes/ms-functions.php	Notifies the site administrator that their site activation was successful.
is_email_address_unsafe() wp-includes/ms-functions.php	Checks an email address against a list of banned domains.
wpmu_validate_user_signup() wp-includes/ms-functions.php	Sanitizes and validates data required for a user sign-up.
wpmu_validate_blog_signup() wp-includes/ms-functions.php	Processes new site registrations.
wpmu_signup_blog() wp-includes/ms-functions.php	Records site signup information for future activation.
wpmu_signup_user() wp-includes/ms-functions.php	Records user signup information for future activation.
wpmu_signup_blog_notification() wp-includes/ms-functions.php	Sends a confirmation request email to a user when they sign up for a new site. The new site will not become active until the confirmation link is clicked.
wpmu_signup_user_notification() wp-includes/ms-functions.php	Sends a confirmation request email to a user when they sign up for a new user account (without signing up for a site at the same time). The user account will not become active until the confirmation link is clicked.
sanitize_bookmark_field() wp-includes/bookmark.php	Sanitizes a bookmark field.
add_user_to_blog() wp-includes/ms-functions.php	Adds a user to a blog, along with specifying the user’s role.
WP_HTTP_IXR_Client::query() wp-includes/class-wp-http-ixr-client.php
get_bookmarks() wp-includes/bookmark.php	Retrieves the list of bookmarks.
get_site_by_path() wp-includes/ms-load.php	Retrieves the closest matching site object by its domain and path.
graceful_fail() wp-includes/ms-deprecated.php	Deprecated functionality to gracefully fail.
ms_site_check() wp-includes/ms-load.php	Checks status of current blog.
WP_Scripts::do_item() wp-includes/class-wp-scripts.php	Processes a script dependency.
WP_Scripts::all_deps() wp-includes/class-wp-scripts.php	Determines script dependencies.
the_author_meta() wp-includes/author-template.php	Outputs the field from the user’s DB object. Defaults to current post’s author.
get_the_author_link() wp-includes/author-template.php	Retrieves either author’s link or author’s name.
get_author_posts_url() wp-includes/author-template.php	Retrieves the URL to the author page for the user with the ID provided.
wp_list_authors() wp-includes/author-template.php	Lists all the authors of the site, with several options available.
is_multi_author() wp-includes/author-template.php	Determines whether this site has more than one author.
get_the_author_meta() wp-includes/author-template.php	Retrieves the requested data of the author of the current post.
get_the_author() wp-includes/author-template.php	Retrieves the author of the current post.
get_the_modified_author() wp-includes/author-template.php	Retrieves the author who last edited the current post.
get_blog_option() wp-includes/ms-blogs.php	Retrieve option value for a given blog id based on name of option.
wp_setup_nav_menu_item() wp-includes/nav-menu.php	Decorates a menu item object with the shared navigation menu item properties.
has_nav_menu() wp-includes/nav-menu.php	Determines whether a registered nav menu location has a menu assigned to it.
wp_get_nav_menus() wp-includes/nav-menu.php	Returns all navigation menu objects.
wp_get_nav_menu_items() wp-includes/nav-menu.php	Retrieves all menu items of a navigation menu.
wp_get_nav_menu_object() wp-includes/nav-menu.php	Returns a navigation menu object.
wp_xmlrpc_server::mt_supportedTextFilters() wp-includes/class-wp-xmlrpc-server.php	Retrieve an empty array because we don’t support per-post text filters.
wp_xmlrpc_server::pingback_ping() wp-includes/class-wp-xmlrpc-server.php	Retrieves a pingback and registers it.
wp_xmlrpc_server::pingback_error() wp-includes/class-wp-xmlrpc-server.php	Sends a pingback error based on the given error code and message.
wp_xmlrpc_server::mw_newMediaObject() wp-includes/class-wp-xmlrpc-server.php	Uploads a file, following your settings.
wp_xmlrpc_server::wp_getPostType() wp-includes/class-wp-xmlrpc-server.php	Retrieves a post type
wp_xmlrpc_server::wp_getPostTypes() wp-includes/class-wp-xmlrpc-server.php	Retrieves a post types
wp_xmlrpc_server::wp_getRevisions() wp-includes/class-wp-xmlrpc-server.php	Retrieve revisions for a specific post.
wp_xmlrpc_server::wp_newComment() wp-includes/class-wp-xmlrpc-server.php	Create new comment.
wp_xmlrpc_server::wp_getPosts() wp-includes/class-wp-xmlrpc-server.php	Retrieve posts.
wp_xmlrpc_server::wp_getTaxonomy() wp-includes/class-wp-xmlrpc-server.php	Retrieve a taxonomy.
wp_xmlrpc_server::wp_getTaxonomies() wp-includes/class-wp-xmlrpc-server.php	Retrieve all taxonomies.
wp_xmlrpc_server::wp_getUser() wp-includes/class-wp-xmlrpc-server.php	Retrieve a user.
wp_xmlrpc_server::wp_getUsers() wp-includes/class-wp-xmlrpc-server.php	Retrieve users.
wp_xmlrpc_server::wp_getProfile() wp-includes/class-wp-xmlrpc-server.php	Retrieve information about the requesting user.
wp_xmlrpc_server::_prepare_page() wp-includes/class-wp-xmlrpc-server.php	Prepares page data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_comment() wp-includes/class-wp-xmlrpc-server.php	Prepares comment data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_user() wp-includes/class-wp-xmlrpc-server.php	Prepares user data for return in an XML-RPC object.
wp_xmlrpc_server::_insert_post() wp-includes/class-wp-xmlrpc-server.php	Helper method for wp_newPost() and wp_editPost(), containing shared logic.
wp_xmlrpc_server::wp_getPost() wp-includes/class-wp-xmlrpc-server.php	Retrieve a post.
wp_xmlrpc_server::_prepare_taxonomy() wp-includes/class-wp-xmlrpc-server.php	Prepares taxonomy data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_term() wp-includes/class-wp-xmlrpc-server.php	Prepares term data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_post() wp-includes/class-wp-xmlrpc-server.php	Prepares post data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_post_type() wp-includes/class-wp-xmlrpc-server.php	Prepares post data for return in an XML-RPC object.
wp_xmlrpc_server::_prepare_media_item() wp-includes/class-wp-xmlrpc-server.php	Prepares media item data for return in an XML-RPC object.
wp_xmlrpc_server::__construct() wp-includes/class-wp-xmlrpc-server.php	Registers all of the XMLRPC methods that XMLRPC server understands.
wp_xmlrpc_server::login() wp-includes/class-wp-xmlrpc-server.php	Log user in.
wp_xmlrpc_server::initialise_blog_option_info() wp-includes/class-wp-xmlrpc-server.php	Set up blog options property.
wpdb::query() wp-includes/class-wpdb.php	Performs a database query, using current database connection.
wpdb::set_sql_mode() wp-includes/class-wpdb.php	Changes the current SQL mode, and ensures its WordPress compatibility.
WP_Widget::display_callback() wp-includes/class-wp-widget.php	Generates the actual widget content (Do NOT override).
WP_Widget::update_callback() wp-includes/class-wp-widget.php	Handles changed settings (Do NOT override).
WP_Widget::form_callback() wp-includes/class-wp-widget.php	Generates the widget control form (Do NOT override).
dynamic_sidebar() wp-includes/widgets.php	Display dynamic sidebar.
is_active_sidebar() wp-includes/widgets.php	Determines whether a sidebar contains widgets.
wp_get_sidebars_widgets() wp-includes/widgets.php	Retrieve full list of sidebars and their widget instance IDs.
the_widget() wp-includes/widgets.php	Output an arbitrary widget as a template tag.
register_sidebar() wp-includes/widgets.php	Builds the definition for a single sidebar and returns the ID.
get_post_reply_link() wp-includes/comment-template.php	Retrieves HTML content for reply to post link.
get_cancel_comment_reply_link() wp-includes/comment-template.php	Retrieves HTML content for cancel comment reply link.
get_comment_id_fields() wp-includes/comment-template.php	Retrieves hidden input HTML for replying to comments.
wp_list_comments() wp-includes/comment-template.php	Displays a list of comments.
comment_form() wp-includes/comment-template.php	Outputs a complete commenting form for use within a template.
get_trackback_url() wp-includes/comment-template.php	Retrieves the current post’s trackback URL.
comments_open() wp-includes/comment-template.php	Determines whether the current post is open for comments.
pings_open() wp-includes/comment-template.php	Determines whether the current post is open for pings.
comments_template() wp-includes/comment-template.php	Loads the comment template specified in $file.
comments_popup_link() wp-includes/comment-template.php	Displays the link to the comments for the current post ID.
get_comment_reply_link() wp-includes/comment-template.php	Retrieves HTML content for reply to comment link.
get_comment_link() wp-includes/comment-template.php	Retrieves the link to a given comment.
get_comments_link() wp-includes/comment-template.php	Retrieves the link to the current post comments.
get_comments_number() wp-includes/comment-template.php	Retrieves the amount of comments a post has.
get_comment_text() wp-includes/comment-template.php	Retrieves the text of the current comment.
comment_text() wp-includes/comment-template.php	Displays the text of the current comment.
get_comment_time() wp-includes/comment-template.php	Retrieves the comment time of the current comment.
get_comment_type() wp-includes/comment-template.php	Retrieves the comment type of the current comment.
comment_author_url() wp-includes/comment-template.php	Displays the URL of the author of the current comment, not linked.
get_comment_author_url_link() wp-includes/comment-template.php	Retrieves the HTML link of the URL of the author of the current comment.
get_comment_class() wp-includes/comment-template.php	Returns the classes for the comment div as an array.
get_comment_date() wp-includes/comment-template.php	Retrieves the comment date of the current comment.
get_comment_excerpt() wp-includes/comment-template.php	Retrieves the excerpt of the given comment.
comment_excerpt() wp-includes/comment-template.php	Displays the excerpt of the current comment.
get_comment_ID() wp-includes/comment-template.php	Retrieves the comment ID of the current comment.
get_comment_author() wp-includes/comment-template.php	Retrieves the author of the current comment.
comment_author() wp-includes/comment-template.php	Displays the author of the current comment.
get_comment_author_email() wp-includes/comment-template.php	Retrieves the email of the author of the current comment.
comment_author_email() wp-includes/comment-template.php	Displays the email of the author of the current global $comment.
get_comment_author_email_link() wp-includes/comment-template.php	Returns the HTML email link to the author of the current comment.
get_comment_author_link() wp-includes/comment-template.php	Retrieves the HTML link to the URL of the author of the current comment.
get_comment_author_IP() wp-includes/comment-template.php	Retrieves the IP address of the author of the current comment.
get_comment_author_url() wp-includes/comment-template.php	Retrieves the URL of the author of the current comment, not linked.
WP_Customize_Widgets::capture_filter_pre_get_option() wp-includes/class-wp-customize-widgets.php	Pre-filters captured option values before retrieving.
WP_Customize_Widgets::get_setting_args() wp-includes/class-wp-customize-widgets.php	Retrieves common arguments to supply when constructing a Customizer setting.
WP_Customize_Widgets::customize_register() wp-includes/class-wp-customize-widgets.php	Registers Customizer settings and controls for all sidebars and widgets.
WP_Customize_Widgets::is_wide_widget() wp-includes/class-wp-customize-widgets.php	Determines whether the widget is considered “wide”.
print_head_scripts() wp-includes/script-loader.php	Prints the script queue in the HTML head on admin pages.
print_footer_scripts() wp-includes/script-loader.php	Prints the scripts that were queued for the footer or too late for the HTML head.
print_admin_styles() wp-includes/script-loader.php	Prints the styles queue in the HTML head on admin pages.
print_late_styles() wp-includes/script-loader.php	Prints the styles that were queued too late for the HTML head.
wp_default_scripts() wp-includes/script-loader.php	Registers all WordPress scripts.
_close_comments_for_old_posts() wp-includes/comment.php	Closes comments on old posts on the fly, without any extra DB queries. Hooked to the_posts.
_close_comments_for_old_post() wp-includes/comment.php	Closes comments on an old post. Hooked to comments_open and pings_open.
wp_new_comment() wp-includes/comment.php	Adds a new comment to the database.
wp_update_comment() wp-includes/comment.php	Updates an existing comment in the database.
wp_update_comment_count_now() wp-includes/comment.php	Updates the comment count for the post.
do_trackbacks() wp-includes/comment.php	Performs trackbacks.
pingback() wp-includes/comment.php	Pings back the links found in a post.
wp_get_current_commenter() wp-includes/comment.php	Gets current commenter’s name, email, and URL.
wp_filter_comment() wp-includes/comment.php	Filters and sanitizes comment data.
get_page_of_comment() wp-includes/comment.php	Calculates what page number a comment will appear on for comment paging.
wp_count_comments() wp-includes/comment.php	Retrieves the total comment counts for the whole site or a single post.
wp_set_comment_cookies() wp-includes/comment.php	Sets the cookies used to store an unauthenticated commentator’s identity. Typically used to recall previous comments by this commentator that are still held in moderation.
sanitize_comment_cookies() wp-includes/comment.php	Sanitizes the cookies sent to the user already.
wp_allow_comment() wp-includes/comment.php	Validates whether this comment is allowed to be made.
is_protected_meta() wp-includes/meta.php	Determines whether a meta key is considered protected.
sanitize_meta() wp-includes/meta.php	Sanitizes meta value.
register_meta() wp-includes/meta.php	Registers a meta key.
check_comment() wp-includes/comment.php	Checks whether a comment passes internal checks to be allowed to add.
get_comment() wp-includes/comment.php	Retrieves comment data given a comment ID or comment object.
delete_metadata() wp-includes/meta.php	Deletes metadata for the specified object.
metadata_exists() wp-includes/meta.php	Determines if a meta field with the given key exists for the given object ID.
get_metadata_by_mid() wp-includes/meta.php	Retrieves metadata by meta ID.
update_metadata_by_mid() wp-includes/meta.php	Updates metadata by meta ID.
delete_metadata_by_mid() wp-includes/meta.php	Deletes metadata by meta ID.
update_meta_cache() wp-includes/meta.php	Updates the metadata cache for the specified objects.
_WP_Editors::wp_link_query() wp-includes/class-wp-editor.php	Performs post queries for internal linking.
add_metadata() wp-includes/meta.php	Adds metadata for the specified object.
update_metadata() wp-includes/meta.php	Updates metadata for the specified object. If no value already exists for the specified object ID and metadata key, the metadata will be added.
_WP_Editors::editor_settings() wp-includes/class-wp-editor.php
_WP_Editors::wp_mce_translation() wp-includes/class-wp-editor.php	Translates the default TinyMCE strings and returns them as JSON encoded object ready to be loaded with tinymce.addI18n(), or as JS snippet that should run after tinymce.js is loaded.
_WP_Editors::parse_settings() wp-includes/class-wp-editor.php	Parse default arguments for the editor instance.
_WP_Editors::editor() wp-includes/class-wp-editor.php	Outputs the HTML for a single instance of the editor.
wp_print_media_templates() wp-includes/media-template.php	Prints the templates used in the media manager.

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Changelog

Changelog
Version	Description
6.0.0	Formalized the existing and already documented `...$args` parameter by adding it to the function signature.
0.71	Introduced.

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User Contributed Notes

Contributed by Codex — 8 years ago

Echo after Filtering

echo apply_filters( $tag, $value );

Get Filtered

$myvar = apply_filters( $tag, $value );

Additional Filter Arguments

$myvar = apply_filters( $tag, $value, $param, $otherparam );

For example:

$myvar = apply_filters( 'example_filter', 'filter me', 'arg1', 'arg2 ');

With the_title filter

$my_custom_title = apply_filters('the_title', '  My Custom Title (tm)  ');
$my_custom_title will now contain 'My Custom Title ™', since the_title filter applies wptexturize() and trim(), among others.

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Contributed by icc97 — 6 years ago
One fundamental argument that is easy to miss is specifying the number of arguments. Most filters have only one argument and so people drop the argument from add_filter.

The 3, below is very important.
```
add_filter( 'example_filter', 'example_callback', 10, 3 );
```
Otherwise you get the following error, such as this StackOverflow question(http://stackoverflow.com/questions/24198086/missing-argument-2-for-the-function-in-wordpress):

Missing argument 2 for example_callback()
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Contributed by Dave Gaskin — 4 years ago

Something that is not obvious from reading this function’s definition and description is that if add_filter( 'filter_name', 'filter_function' ) is never called/executed in code, the use of apply_filters( 'filter_name', $value ) will return the value of $value by default.

I noticed a call to apply_filters( 'my_filter', ... ) in my theme’s functions.php file and couldn’t find a similar add_filter( 'my_filter', ... ) call anywhere else and was confused about this (I’m still wrapping my head around filters/hooks).

More detail on this can be seen in the example found on this page: https://docs.presscustomizr.com/article/26-wordpress-actions-filters-and-hooks-a-guide-for-non-developers at the section about Filters.

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Contributed by anupamkhosla — 11 months ago

The second line in the description is technically incorrect:

“It is possible to create new filter hooks by simply calling this function…”

apply_filters doesn’t create filter hooks. Read for https://stackoverflow.com/q/72161547/3429430 details

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Contributed by tampadave — 7 years ago

Uh huh.

apply_filters ( string $tag, mixed $value );

function apply_filters( $tag, $value )

Parameters:
$tag — (string) (Required) The name of the filter hook.
$value — (mixed) (Required) The value on which the filters hooked to $tag are applied on.
$var — (mixed) (Required) Additional variables passed to the functions hooked to $tag.

Right. Tip: this does not make sense, in case you missed it.

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