over-engineer / wordpress-hooks

Organizes WordPress hooks by the file they're defined in.

WordPress Hooks Reference

Updated for WordPress 5.2.2

This is a one-page compendium of WordPress hooks, organized by the file they're declared in.

About this page

This page was automatically generated by scraping the official WordPress Hook Reference pages.

Generating the page

1. clone the repo and run npm install / yarn in the project folder
2. run npm run scrape / yarn scrape to scrape the WP reference pages into a hooks.json
3. run npm run docs / yarn docs to extract the description of each source file from a WordPress repo
4. run npm run generate / yarn generate to convert the JSON data into this README.md

Note: Right now, you need to have the WordPress repo cloned into a folder wordpress adjacent to the wordpress-hooks repo.

Hooks reference

wp-activate.php

Confirms that the activation key that is sent in an email after a user signs up for a new site matches the key for that user and then displays confirmation.

Hook	Type	Description
activate_header	Action	Fires before the Site Activation page is loaded.
activate_wp_head	Action	Fires before the Site Activation page is loaded.

wp-admin / admin-footer.php

WordPress Administration Template Footer

Hook	Type	Description
admin_footer	Action	Prints scripts or data before the default footer scripts.
admin_footer-{$GLOBALS[‘hook_suffix’]}	Action	Print scripts or data after the default footer scripts.
admin_footer-{$hook_suffix}	Action	Prints scripts or data after the default footer scripts.
admin_footer_text	Filter	Filters the “Thank you” text displayed in the admin footer.
admin_print_footer_scripts	Action	Prints any scripts and data queued for the footer.
admin_print_footer_scripts-{$hook_suffix}	Action	Prints scripts and data queued for the footer.
in_admin_footer	Action	Fires after the opening tag for the admin footer.

wp-admin / admin-header.php

WordPress Administration Template Header

Hook	Type	Description
admin_body_class	Filter	Filters the CSS classes for the body tag in the admin.
admin_enqueue_scripts	Action	Enqueue scripts for all admin pages.
admin_head	Action	Fires in head section for all admin pages.
admin_head-{$hook_suffix}	Action	Fires in head section for a specific admin page.
admin_notices	Action	Prints admin screen notices.
admin_print_scripts	Action	Fires when scripts are printed for all admin pages.
admin_print_scripts-{$hook_suffix}	Action	Fires when scripts are printed for a specific admin page based on $hook_suffix.
admin_print_styles	Action	Fires when styles are printed for all admin pages.
admin_print_styles-{$hook_suffix}	Action	Fires when styles are printed for a specific admin page based on $hook_suffix.
admin_title	Filter	Filters the title tag content for an admin page.
all_admin_notices	Action	Prints generic admin screen notices.
in_admin_header	Action	Fires at the beginning of the content section in an admin page.
network_admin_notices	Action	Prints network admin screen notices.

wp-admin / admin-post.php

WordPress Generic Request (POST/GET) Handler Intended for form submission handling in themes and plugins.

Hook	Type	Description
admin_post	Action	Fires on an authenticated admin post request where no action is supplied.
admin_post_nopriv	Action	Fires on a non-authenticated admin post request where no action was supplied.
admin_post_nopriv_{$action}	Action	Fires on a non-authenticated admin post request for the given action.
admin_post_{$action}	Action	Fires on an authenticated admin post request for the given action.

wp-admin / admin.php

WordPress Administration Bootstrap

Hook	Type	Description
admin_action_{$action}	Action	Fires when an ‘action’ request variable is sent.
admin_action_{$_REQUEST[‘action’]}	Action	Fires when an ‘action’ request variable is sent.
admin_init	Action	Fires as an admin screen or script is being initialized.
after_db_upgrade	Action	Fires on the next page load after a successful DB upgrade.
do_mu_upgrade	Filter	In WordPress Administration Screens
force_filtered_html_on_import	Filter	Whether to filter imported data through kses on import.
load-categories.php	Action
load-edit-link-categories.php	Action
load-importer-{$importer}	Action	Fires before an importer screen is loaded.
load-page-new.php	Action
load-page.php	Action
load-{$pagenow}	Action	Fires before a particular screen is loaded.
load-{$page_hook}	Action	Fires before a particular screen is loaded.
load-{$plugin_page}	Action	Fires before a particular screen is loaded.

wp-admin / async-upload.php

Server-side file upload handler from wp-plupload or other asynchronous upload methods.

Hook	Type	Description
async_upload_{$type}	Filter	Filters the returned ID of an uploaded attachment.

wp-admin / comment.php

Comment Management Screen

Hook	Type	Description
comment_edit_redirect	Filter	Filters the URI the user is redirected to after editing a comment in the admin.

wp-admin / custom-header.php

The custom header image script.

Hook	Type	Description
custom_header_options	Action	Fires just before the submit button in the custom header options form.

wp-admin / customize.php

Theme Customize Screen.

Hook	Type	Description
customize_controls_enqueue_scripts	Action	Enqueue Customizer control scripts.
customize_controls_init	Action	Fires when Customizer controls are initialized, before scripts are enqueued.
customize_controls_print_footer_scripts	Action	Prints templates, control scripts, and settings in the footer.
customize_controls_print_scripts	Action	Fires when Customizer control scripts are printed.
customize_controls_print_styles	Action	Fires when Customizer control styles are printed.

wp-admin / edit-comments.php

Edit Comments Administration Screen.

Hook	Type	Description
‘handle_bulk_actions-‘ . get_current_screen()->id	Filter	Fires when a custom bulk action should be handled.
handle_bulk_actions-{$screen}	Filter	Fires when a custom bulk action should be handled.

wp-admin / edit-form-advanced.php

Post advanced form for inclusion in the administration panels.

Hook	Type	Description
dbx_post_sidebar	Action	Fires after all meta box sections have been output, before the closing #post-body div.
edit_form_advanced	Action	Fires after ‘normal’ context meta boxes have been output for all post types other than ‘page’.
edit_form_after_editor	Action	Fires after the content editor.
edit_form_after_title	Action	Fires after the title field.
edit_form_before_permalink	Action	Fires before the permalink field in the edit form.
edit_form_top	Action	Fires at the beginning of the edit form.
edit_page_form	Action	Fires after ‘normal’ context meta boxes have been output for the ‘page’ post type.
enter_title_here	Filter	Filters the title field placeholder text.
post_edit_form_tag	Action	Fires inside the post editor form tag.
post_updated_messages	Filter	Filters the post updated messages.

wp-admin / edit-form-blocks.php

The Block Editor page.

Hook	Type	Description
allowed_block_types	Filter	Filters the allowed block types for the editor, defaulting to true (all block types supported).
block_editor_no_javascript_message	Filter	Filters the message displayed in the block editor interface when JavaScript is not enabled in the browser.
block_editor_preload_paths	Filter	Preload common data by specifying an array of REST API paths that will be preloaded.
block_editor_settings	Filter	Filters the settings to pass to the block editor.
enqueue_block_editor_assets	Action	Fires after block assets have been enqueued for the editing interface.

wp-admin / edit-form-comment.php

Edit comment form for inclusion in another file.

Hook	Type	Description
add_meta_boxes_comment	Action	Fires when comment-specific meta boxes are added.
edit_comment_misc_actions	Filter	Filters miscellaneous actions for the edit comment form sidebar.

wp-admin / edit-link-form.php

Edit links form for inclusion in administration panels.

Hook	Type	Description
add_meta_boxes_link	Action	Fires when link-specific meta boxes are added.

wp-admin / edit-tag-form.php

Edit tag form for inclusion in administration panels.

Hook	Type	Description
editable_slug	Filter	Filters the editable slug.
edit_category_form_fields	Action	Fires after the Edit Category form fields are displayed.
edit_category_form_pre	Action	Fires before the Edit Category form.
edit_link_category_form_fields	Action	Fires after the Edit Link Category form fields are displayed.
edit_link_category_form_pre	Action	Fires before the Edit Link Category form.
edit_tag_form	Action	Fires at the end of the Edit Term form.
edit_tag_form_fields	Action	Fires after the Edit Tag form fields are displayed.
edit_tag_form_pre	Action	Fires before the Edit Tag form.

wp-admin / edit-tags.php

Edit Tags Administration Screen.

Hook	Type	Description
add_category_form_pre	Action	Fires before the Add Category form.
add_link_category_form_pre	Action	Fires before the link category form.
add_tag_form	Action	Fires at the end of the Add Tag form.
add_tag_form_fields	Action	Fires after the Add Tag form fields for non-hierarchical taxonomies.
add_tag_form_pre	Action	Fires before the Add Tag form.
after-{$taxonomy}-table	Action	Fires after the taxonomy list table.
edit_category_form	Action	Fires at the end of the Edit Category form.
edit_link_category_form	Action	Fires at the end of the Edit Link form.
redirect_term_location	Filter	Filters the taxonomy redirect destination URL.

wp-admin / edit.php

Edit Posts Administration Screen.

Hook	Type	Description
bulk_post_updated_messages	Filter	Filters the bulk action updated messages.

wp-admin / export.php

WordPress Export Administration Screen

Hook	Type	Description
export_args	Filter	Filters the export args.
export_filters	Action	Fires at the end of the export filters form.

wp-admin / includes / ajax-actions.php

Administration API: Core Ajax handlers

Hook	Type	Description
ajax_query_attachments_args	Filter	Filters the arguments passed to WP_Query during an Ajax call for querying attachments.
heartbeat_nopriv_received	Filter	Filters Heartbeat Ajax response in no-privilege environments.
heartbeat_nopriv_send	Filter	Filters Heartbeat Ajax response in no-privilege environments when no data is passed.
heartbeat_nopriv_tick	Action	Fires when Heartbeat ticks in no-privilege environments.
heartbeat_received	Filter	Filters the Heartbeat response received.
heartbeat_send	Filter	Filters the Heartbeat response sent.
heartbeat_tick	Action	Fires when Heartbeat ticks in logged-in environments.
load-widgets.php	Action	Fires early when editing the widgets displayed in sidebars.

wp-admin / includes / bookmark.php

WordPress Bookmark Administration API

Hook	Type	Description
add_link	Action	Fires after a link was added to the database.
deleted_link	Action	Fires after a link has been deleted.
delete_link	Action	Fires before a link is deleted.
edit_link	Action	Fires after a link was updated in the database.

wp-admin / includes / class-core-upgrader.php

Upgrade API: Core_Upgrader class

Hook	Type	Description
allow_dev_auto_core_updates	Filter	Filters whether to enable automatic core updates for development versions.
allow_major_auto_core_updates	Filter	Filters whether to enable major automatic core updates.
allow_minor_auto_core_updates	Filter	Filters whether to enable minor automatic core updates.

wp-admin / includes / class-language-pack-upgrader.php

Upgrade API: Language_Pack_Upgrader class

Hook	Type	Description
async_update_translation	Filter	Filters whether to asynchronously update translation for core, a plugin, or a theme.

wp-admin / includes / class-plugin-installer-skin.php

Upgrader API: Plugin_Installer_Skin class

Hook	Type	Description
install_plugin_complete_actions	Filter	Filters the list of action links available following a single plugin installation.

wp-admin / includes / class-theme-installer-skin.php

Upgrader API: Theme_Installer_Skin class

Hook	Type	Description
install_theme_complete_actions	Filter	Filters the list of action links available following a single theme installation.

wp-admin / includes / class-wp-automatic-updater.php

Upgrade API: WP_Automatic_Updater class

Hook	Type	Description
automatic_updater_disabled	Filter	Filters whether to entirely disable background updates.
automatic_updates_complete	Action	Fires after all automatic updates have run.
automatic_updates_debug_email	Filter	Filters the debug email that can be sent following an automatic background core update.
automatic_updates_is_vcs_checkout	Filter	Filters whether the automatic updater should consider a filesystem location to be potentially managed by a version control system.
automatic_updates_send_debug_email	Filter	Filters whether to send a debugging email for each automatic background update.
auto_core_update_email	Filter	Filters the email sent following an automatic background core update.
auto_core_update_send_email	Filter	Filters whether to send an email following an automatic background core update.
auto_update_{$type}	Filter	Filters whether to automatically update core, a plugin, a theme, or a language.
pre_auto_update	Action	Fires immediately prior to an auto-update.

wp-admin / includes / class-wp-comments-list-table.php

List Table API: WP_Comments_List_Table class

Hook	Type	Description
admin_comment_types_dropdown	Filter	Filters the comment types dropdown menu.
comments_list_table_query_args	Filter	Filters the arguments for the comment query in the comments list table.
comments_per_page	Filter	Filters the number of comments listed per page in the comments list table.
comment_status_links	Filter	Filters the comment status links.
manage_comments_custom_column	Action	Fires when the default column output is displayed for a single row.
manage_comments_nav	Action	Fires after the Filter submit button for comment types.
restrict_manage_comments	Action	Fires just before the Filter submit button for comment types.

wp-admin / includes / class-wp-debug-data.php

Class for providing debug data based on a users WordPress environment.

Hook	Type	Description
debug_information	Filter	Add or modify the debug information.

wp-admin / includes / class-wp-links-list-table.php

List Table API: WP_Links_List_Table class

Hook	Type	Description
manage_link_custom_column	Action	Fires for each registered custom link column.

wp-admin / includes / class-wp-list-table.php

Administration API: WP_List_Table class

Hook	Type	Description
bulk_actions-{$this->screen->id}	Filter	Filters the list table Bulk Actions drop-down.
disable_months_dropdown	Filter	Filters whether to remove the ‘Months’ drop-down from the post list table.
list_table_primary_column	Filter	Filters the name of the primary column for the current list table.
manage_{$this->screen->id}_sortable_columns	Filter	Filters the list table sortable columns for a specific screen.
months_dropdown_results	Filter	Filters the ‘Months’ drop-down results.

wp-admin / includes / class-wp-media-list-table.php

List Table API: WP_Media_List_Table class

Hook	Type	Description
manage_media_columns	Filter	Filters the Media list table columns.
manage_media_custom_column	Action	Fires for each custom column in the Media list table.
manage_taxonomies_for_attachment_columns	Filter	Filters the taxonomy columns for attachments in the Media list table.
media_row_actions	Filter	Filters the action links for each attachment in the Media list table.

wp-admin / includes / class-wp-ms-sites-list-table.php

List Table API: WP_MS_Sites_List_Table class

Hook	Type	Description
manage_sites_action_links	Filter	Filters the action links displayed for each site in the Sites list table.
manage_sites_custom_column	Action	Fires for each registered custom column in the Sites list table.
ms_sites_list_table_query_args	Filter	Filters the arguments for the site query in the sites list table.

wp-admin / includes / class-wp-ms-themes-list-table.php

List Table API: WP_MS_Themes_List_Table class

Hook	Type	Description
after_theme_row	Action	Fires after each row in the Multisite themes list table.
after_theme_row_{$stylesheet}	Action	Fires after each specific row in the Multisite themes list table.
all_themes	Filter	Filters the full array of WP_Theme objects to list in the Multisite themes list table.
manage_themes_custom_column	Action	Fires inside each custom column of the Multisite themes list table.

wp-admin / includes / class-wp-ms-users-list-table.php

List Table API: WP_MS_Users_List_Table class

Hook	Type	Description
ms_user_list_site_actions	Filter	Filters the action links displayed next the sites a user belongs to in the Network Admin Users list table.
ms_user_list_site_class	Filter	Filters the span class for a site listing on the mulisite user list table.
ms_user_row_actions	Filter	Filters the action links displayed under each user in the Network Admin Users list table.

wp-admin / includes / class-wp-plugin-install-list-table.php

List Table API: WP_Plugin_Install_List_Table class

Hook	Type	Description
install_plugins_nonmenu_tabs	Filter	Filters tabs not associated with a menu item on the Plugin Install screen.
install_plugins_table_api_args_{$tab}	Filter	Filters API request arguments for each Plugin Install screen tab.
install_plugins_table_header	Action	Fires before the Plugin Install table header pagination is displayed.
install_plugins_tabs	Filter	Filters the tabs shown on the Plugin Install screen.
plugin_install_action_links	Filter	Filters the install action links for a plugin.

wp-admin / includes / class-wp-plugins-list-table.php

List Table API: WP_Plugins_List_Table class

Hook	Type	Description
after_plugin_row	Action	Fires after each row in the Plugins list table.
after_plugin_row_{$plugin_file}	Action	Fires after each specific row in the Plugins list table.
all_plugins	Filter	Filters the full array of plugins to list in the Plugins list table.
manage_plugins_custom_column	Action	Fires inside each custom column of the Plugins list table.
network_admin_plugin_action_links	Filter	Filters the action links displayed for each plugin in the Network Admin Plugins list table.
network_admin_plugin_action_links_{$plugin_file}	Filter	Filters the list of action links displayed for a specific plugin in the Network Admin Plugins list table.
plugin_action_links	Filter	Filters the action links displayed for each plugin in the Plugins list table.
plugin_action_links_{$plugin_file}	Filter	Filters the list of action links displayed for a specific plugin in the Plugins list table.
plugin_row_meta	Filter	Filters the array of row meta for each plugin in the Plugins list table.

wp-admin / includes / class-wp-posts-list-table.php

List Table API: WP_Posts_List_Table class

Hook	Type	Description
bulk_edit_custom_box	Action	Fires once for each column in Bulk Edit mode.
disable_categories_dropdown	Filter	Filters whether to remove the ‘Categories’ drop-down from the post list table.
disable_formats_dropdown	Filter	Filters whether to remove the ‘Formats’ drop-down from the post list table.
manage_pages_columns	Filter	Filters the columns displayed in the Pages list table.
manage_pages_custom_column	Action	Fires in each custom column on the Posts list table.
manage_posts_columns	Filter	Filters the columns displayed in the Posts list table.
manage_posts_custom_column	Action	Fires in each custom column in the Posts list table.
manage_posts_extra_tablenav	Action	Fires immediately following the closing “actions” div in the tablenav for the posts list table.
manage_taxonomies_for_{$post_type}_columns	Filter	Filters the taxonomy columns in the Posts list table.
manage_{$post->post_type}_posts_custom_column	Action	Fires for each custom column of a specific post type in the Posts list table.
manage_{$post_type}_posts_columns	Filter	Filters the columns displayed in the Posts list table for a specific post type.
page_row_actions	Filter	Filters the array of row action links on the Pages list table.
post_column_taxonomy_links	Filter	Filters the links in $taxonomy column of edit.php.
post_date_column_status	Filter	Filters the status text of the post.
post_date_column_time	Filter	Filters the published time of the post.
post_row_actions	Filter	Filters the array of row action links on the Posts list table.
quick_edit_custom_box	Action	Fires once for each column in Quick Edit mode.
quick_edit_dropdown_pages_args	Filter	Filters the arguments used to generate the Quick Edit page-parent drop-down.
quick_edit_show_taxonomy	Filter	Filters whether the current taxonomy should be shown in the Quick Edit panel.
restrict_manage_posts	Action	Fires before the Filter button on the Posts and Pages list tables.

wp-admin / includes / class-wp-press-this.php

Hook	Type	Description
enable_press_this_media_discovery	Filter	Filters whether to enable in-source media discovery in Press This.
press_this_data	Filter	Filters the Press This data array.
press_this_redirect_in_parent	Filter	Filters whether or not Press This should redirect the user in the parent window upon save.
press_this_save_post	Filter	Filters the post data of a Press This post before saving/updating.
press_this_save_redirect	Filter	Filters the URL to redirect to when Press This saves.
press_this_suggested_html	Filter	Filters the default HTML tags used in the suggested content for the editor.

wp-admin / includes / class-wp-screen.php

Screen API: WP_Screen class

Hook	Type	Description
contextual_help	Filter	Filters the legacy contextual help text.
contextual_help_list	Filter	Filters the legacy contextual help list.
current_screen	Action	Fires after the current screen has been set.
default_contextual_help	Filter	Filters the default legacy contextual help text.

wp-admin / includes / class-wp-terms-list-table.php

List Table API: WP_Terms_List_Table class

Hook	Type	Description
edit_categories_per_page	Filter	Filters the number of terms displayed per page for the Categories list table.
edit_tags_per_page	Filter	Filters the number of terms displayed per page for the Tags list table.
manage_{$this->screen->taxonomy}_custom_column	Filter	Filters the displayed columns in the terms list table.

wp-admin / includes / class-wp-theme-install-list-table.php

List Table API: WP_Theme_Install_List_Table class

Hook	Type	Description
install_themes_nonmenu_tabs	Filter	Filters tabs not associated with a menu item on the Install Themes screen.
install_themes_table_api_args_{$tab}	Filter	Filters API request arguments for each Install Themes screen tab.
install_themes_table_header	Action	Fires in the Install Themes list table header.

wp-admin / includes / class-wp-users-list-table.php

List Table API: WP_Users_List_Table class

Hook	Type	Description
get_role_list	Filter	Filters the returned array of roles for a user.
manage_users_custom_column	Filter	Filters the display output of custom columns in the Users list table.
manage_users_extra_tablenav	Action	Fires immediately following the closing “actions” div in the tablenav for the users list table.
restrict_manage_users	Action	Fires just before the closing div containing the bulk role-change controls in the Users list table.

wp-admin / includes / comment.php

WordPress Comment Administration API.

Hook	Type	Description
comment_edit_pre	Filter	Filters the comment content before editing.

wp-admin / includes / dashboard.php

WordPress Dashboard Widget Administration Screen API

Hook	Type	Description
activity_box_end	Action	Fires at the end of the ‘At a Glance’ dashboard widget.
browse-happy-notice	Filter	Filters the notice output for the ‘Browse Happy’ nag meta box.
comment_row_actions	Filter	Filters the action links displayed for each comment in the ‘Recent Comments’ dashboard widget.
dashboard_glance_items	Filter	Filters the array of extra elements to list in the ‘At a Glance’ dashboard widget.
dashboard_primary_feed	Filter	Filters the primary feed URL for the ‘WordPress Events and News’ dashboard widget.
dashboard_primary_link	Filter	Filters the primary link URL for the ‘WordPress News’ dashboard widget.
dashboard_primary_title	Filter	Filters the primary link title for the ‘WordPress News’ dashboard widget.
dashboard_recent_drafts_query_args	Filter	Filters the post query arguments for the ‘Recent Drafts’ dashboard widget.
dashboard_recent_posts_query_args	Filter	Filters the query arguments used for the Recent Posts widget.
dashboard_secondary_feed	Filter	Filters the secondary feed URL for the ‘WordPress Events and News’ dashboard widget.
dashboard_secondary_items	Filter	Filters the number of secondary link items for the ‘WordPress News’ dashboard widget.
dashboard_secondary_link	Filter	Filters the secondary link URL for the ‘WordPress Events and News’ dashboard widget.
dashboard_secondary_title	Filter	Filters the secondary link title for the ‘WordPress News’ dashboard widget.
mu_activity_box_end	Action	Fires at the end of the ‘Right Now’ widget in the Network Admin dashboard.
mu_rightnow_end	Action	Fires at the end of the ‘Right Now’ widget in the Network Admin dashboard.
privacy_on_link_text	Filter	Filters the link label for the ‘Search Engines Discouraged’ message displayed in the ‘At a Glance’ dashboard widget.
privacy_on_link_title	Filter	Filters the link title attribute for the ‘Search Engines Discouraged’ message displayed in the ‘At a Glance’ dashboard widget.
rightnow_end	Action	Fires at the end of the ‘At a Glance’ dashboard widget.

wp-admin / includes / deprecated.php

Deprecated admin functions from past WordPress versions. You shouldn't use these functions and look for the alternatives instead. The functions will be removed in a later version.

Hook	Type	Description
get_editable_authors	Filter
get_others_drafts	Filter
pre_user_search	Action

wp-admin / includes / export.php

WordPress Export Administration API

Hook	Type	Description
export_wp	Action	Fires at the beginning of an export, before any headers are sent.
export_wp_filename	Filter	Filters the export filename.

wp-admin / includes / file.php

Filesystem API: Top-level functionality Functions for reading, writing, modifying, and deleting files on the file system. Includes functionality for theme-specific files as well as operations for uploading, archiving, and rendering output when necessary.

Hook	Type	Description
download_url_error_max_body_size	Filter	Filters the maximum error response body size in download_url().
editable_extensions	Filter	Filters file type extensions editable in the plugin editor.
filesystem_method	Filter	Filters the filesystem method to use.
filesystem_method_file	Filter	Filters the path for a specific filesystem method class file.
fs_ftp_connection_types	Filter	Filters the connection types to output to the filesystem credentials form.
pre_move_uploaded_file	Filter	Filters whether to short-circuit moving the uploaded file after passing all checks.
request_filesystem_credentials	Filter	Filters the filesystem credentials form output.

wp-admin / includes / image-edit.php

WordPress Image Editor

Hook	Type	Description
image_editor_save_pre	Filter	Filters the WP_Image_Editor instance for the image to be streamed to the browser.
image_edit_before_change	Filter	Filters the GD image resource before applying changes to the image.
image_save_pre	Filter	Filters the GD image resource to be streamed to the browser.

wp-admin / includes / image.php

File contains all the administration image manipulation functions.

Hook	Type	Description
attachment_thumbnail_args	Filter	Filters the parameters for the attachment thumbnail creation.
fallback_intermediate_image_sizes	Filter	Filters the image sizes generated for non-image mime types.
file_is_displayable_image	Filter	Filters whether the current image is displayable in the browser.
intermediate_image_sizes_advanced	Filter	Filters the image sizes automatically generated when uploading an image.
load_image_to_edit	Filter	Filters the current image being loaded for editing.
load_image_to_edit_attachmenturl	Filter	Filters the image URL if not in the local filesystem.
load_image_to_edit_filesystempath	Filter	Filters the path to the current image.
load_image_to_edit_path	Filter	Filters the returned path or URL of the current image.

wp-admin / includes / media.php

WordPress Administration Media API.

Hook	Type	Description
admin_head-media-upload-popup	Action	Fires when scripts enqueued for the admin header for the legacy (pre-3.5.0) media upload popup are printed.
admin_head_{$content_func}	Action	Fires in the admin header for each specific form tab in the legacy (pre-3.5.0) media upload popup.
admin_print_scripts-media-upload-popup	Action	Fires when admin scripts enqueued for the legacy (pre-3.5.0) media upload popup are printed.
admin_print_styles-media-upload-popup	Action	Fires when admin styles enqueued for the legacy (pre-3.5.0) media upload popup are printed.
attachment_fields_to_edit	Filter	Filters the attachment fields to edit.
attachment_fields_to_save	Filter	Filters the attachment fields to be saved.
audio_submitbox_misc_sections	Filter	Filters the audio attachment metadata fields to be shown in the publish meta box.
disable_captions	Filter	Filters whether to disable captions.
get_media_item_args	Filter	Filters the arguments used to retrieve an image for the edit image form.
image_add_caption_shortcode	Filter	Filters the image HTML markup including the caption shortcode.
image_add_caption_text	Filter	Filters the caption text.
image_send_to_editor	Filter	Filters the image HTML markup to send to the editor when inserting an image.
image_send_to_editor_url	Filter	Filters the image URL sent to the editor.
image_size_names_choose	Filter	Filters the names and labels of the default image sizes.
media_buttons_context	Filter	Filters the legacy (pre-3.5.0) media buttons.
media_meta	Filter	Filters the media metadata.
media_send_to_editor	Filter	Filters the HTML markup for a media item sent to the editor.
media_submitbox_misc_sections	Filter	Filters the audio and video metadata fields to be shown in the publish meta box.
media_upload_form_url	Filter	Filters the media upload form action URL.
media_upload_mime_type_links	Filter	Filters the media upload mime type list items.
media_upload_tabs	Filter	Filters the available tabs in the legacy (pre-3.5.0) media popup.
plupload_init	Filter	Filters the default Plupload settings.
post-html-upload-ui	Action	Fires after the upload button in the media upload interface.
post-plupload-upload-ui	Action	Fires after the upload interface loads.
post-upload-ui	Action	Fires on the post upload UI screen.
pre-html-upload-ui	Action	Fires before the upload button in the media upload interface.
pre-plupload-upload-ui	Action	Fires before the upload interface loads.
pre-upload-ui	Action	Fires just before the legacy (pre-3.5.0) upload interface is loaded.

wp-admin / includes / menu.php

Build Administration Menu.

Hook	Type	Description
add_menu_classes	Filter	Filters administration menus array with classes added for top-level items.
admin_menu	Action	Fires before the administration menu loads in the admin.
admin_page_access_denied	Action	Fires when access to an admin page is denied.
custom_menu_order	Filter	Filters whether to enable custom ordering of the administration menu.
menu_order	Filter	Filters the order of administration menu items.
network_admin_menu	Action	Fires before the administration menu loads in the Network Admin.

wp-admin / includes / meta-boxes.php

Displays post submit form fields. Array of arguments for building the post submit meta box. }

Hook	Type	Description
add_meta_boxes	Action	Fires after all built-in meta boxes have been added.
add_meta_boxes_{$post_type}	Action	Fires after all built-in meta boxes have been added, contextually for the given post type.
attachment_submitbox_misc_actions	Action	Fires after the ‘Uploaded on’ section of the Save meta box in the attachment editing screen.
dbx_post_advanced	Action	Fires in the middle of built-in meta box registration.
default_page_template_title	Filter	Filters the title of the default page template displayed in the drop-down.
do_meta_boxes	Action	Fires after meta boxes have been added.
page_attributes_dropdown_pages_args	Filter	Filters the arguments used to generate a Pages drop-down element.
page_attributes_meta_box_template	Action	Fires immediately after the label inside the ‘Template’ section of the ‘Page Attributes’ meta box.
page_attributes_misc_attributes	Action	Fires before the help hint text in the ‘Page Attributes’ meta box.
post_comment_status_meta_box-options	Action	Fires at the end of the Discussion meta box on the post editing screen.
post_edit_category_parent_dropdown_args	Filter	Filters the arguments for the taxonomy parent dropdown on the Post Edit page.
post_submitbox_minor_actions	Action	Fires before the post time/date setting in the Publish meta box.
post_submitbox_misc_actions	Action	Fires after the post time/date setting in the Publish meta box.
post_submitbox_start	Action	Fires at the beginning of the publishing actions section of the Publish meta box.

wp-admin / includes / misc.php

Misc WordPress Administration API.

Hook	Type	Description
admin_referrer_policy	Filter	Filters the admin referrer policy header value.
documentation_ignore_functions	Filter	Filters the list of functions and classes to be ignored from the documentation lookup.
got_rewrite	Filter	Filters whether Apache and mod_rewrite are present.
got_url_rewrite	Filter	Filters whether URL rewriting is available.
new_admin_email_content	Filter	Filters the text of the email sent when a change of site admin email address is attempted.

wp-admin / includes / ms.php

Multisite administration functions.

Hook	Type	Description
can_edit_network	Filter	Filters whether this network can be edited from this page.
lang_codes	Filter	Filters the language codes.
make_ham_user	Action	Fires after the user is marked as a HAM user. Opposite of SPAM.
make_spam_user	Action	Fires after the user is marked as a SPAM user.
mu_dropdown_languages	Filter	Filters the languages available in the dropdown.
network_edit_site_nav_links	Filter	Filters the links that appear on site-editing network pages.

wp-admin / includes / nav-menu.php

Core Navigation Menu API

Hook	Type	Description
nav_menu_items_{$post_type_name}	Filter	Filters the posts displayed in the ‘View All’ tab of the current post type’s menu items meta box.
nav_menu_items_{$post_type_name}_recent	Filter	Filters the posts displayed in the ‘Most Recent’ tab of the current post type’s menu items meta box.
nav_menu_meta_box_object	Filter	Filters whether a menu items meta box will be added for the current object type.

wp-admin / includes / network.php

WordPress Network Administration API.

Hook	Type	Description
allow_subdirectory_install	Filter	Filters whether to enable the subdirectory installation feature in Multisite.

wp-admin / includes / plugin-install.php

WordPress Plugin Install Administration API

Hook	Type	Description
plugins_api	Filter	Filters the response for the current WordPress.org Plugin Installation API request.
plugins_api_args	Filter	Filters the WordPress.org Plugin Installation API arguments.
plugins_api_result	Filter	Filters the Plugin Installation API response results.

wp-admin / includes / plugin.php

WordPress Plugin Administration API

Hook	Type	Description
activated_plugin	Action	Fires after a plugin has been activated.
activate_{$plugin}	Action	Fires as a specific plugin is being activated.
deactivated_plugin	Action	Fires after a plugin is deactivated.
deactivate_{$plugin}	Action	Fires as a specific plugin is being deactivated.
deleted_plugin	Action	Fires immediately after a plugin deletion attempt.
delete_plugin	Action	Fires immediately before a plugin deletion attempt.
plugin_files_exclusions	Filter	Filters the array of excluded directories and files while scanning the folder.
pre_uninstall_plugin	Action	Fires in uninstall_plugin() immediately before the plugin is uninstalled.

wp-admin / includes / post.php

WordPress Post Administration API.

Hook	Type	Description
$per_page	Filter	Filter the number of items per page to show for a specific ‘per_page’ type.
admin_post_thumbnail_html	Filter	Filters the admin post thumbnail HTML markup to return.
admin_post_thumbnail_size	Filter	Filters the size used to display the post thumbnail image in the ‘Featured Image’ meta box.
block_categories	Filter	Filter the default array of block categories.
block_editor_meta_box_hidden_fields	Action	Add hidden input fields to the meta box save form.
default_content	Filter	Filters the default post content initially used in the “Write Post” form.
default_excerpt	Filter	Filters the default post excerpt initially used in the “Write Post” form.
default_title	Filter	Filters the default post title initially used in the “Write Post” form.
edit_posts_per_page	Filter	Filters the number of posts displayed per page when specifically listing “posts”.
edit_{$post_type}_per_page	Filter	Filters the number of items per page to show for a specific ‘per_page’ type.
filter_block_editor_meta_boxes	Filter	Fires right before the meta boxes are rendered.
get_sample_permalink	Filter	Filters the sample permalink.
get_sample_permalink_html	Filter	Filters the sample permalink HTML markup.
override_post_lock	Filter	Filters whether to allow the post lock to be overridden.
postbox_classes_{$page}_{$id}	Filter	Filters the postbox classes for a specific screen and screen ID combo.
postbox_classes_{$screen_id}_{$box_id}	Filter	Filters the postbox classes for a specific screen and box ID combo.
post_locked_dialog	Action	Fires inside the post locked dialog before the buttons are displayed.
post_lock_lost_dialog	Action	Fires inside the dialog displayed when a user has lost the post lock.
redirect_post_location	Filter	Filters the post redirect destination URL.

wp-admin / includes / revision.php

WordPress Administration Revisions API

Hook	Type	Description
revision_text_diff_options	Filter	Filters revisions text diff options.

wp-admin / includes / schema.php

WordPress Administration Scheme API Here we keep the DB structure and option values.

Hook	Type	Description
populate_network_meta	Filter	Filters meta for a network on creation.
populate_options	Action	Fires before creating WordPress options and populating their default values.
populate_site_meta	Filter	Filters meta for a site on creation.

wp-admin / includes / screen.php

WordPress Administration Screen API.

Hook	Type	Description
default_hidden_columns	Filter	Filters the default list of hidden columns.
default_hidden_meta_boxes	Filter	Filters the default list of hidden meta boxes.
hidden_columns	Filter	Filters the list of hidden columns.
hidden_meta_boxes	Filter	Filters the list of hidden meta boxes.
manage_{$screen->id}_columns	Filter	Filters the column headers for a list table on a specific screen.

wp-admin / includes / template.php

Template WordPress Administration API. A Big Mess. Also some neat functions that are nicely written.

Hook	Type	Description
add_inline_data	Action	Fires after outputting the fields for the inline editor for posts and pages.
admin_xml_ns	Action	Fires inside the HTML tag in the admin header.
display_media_states	Filter	Filters the default media display states for items in the Media list table.
display_post_states	Filter	Filters the default post display states used in the posts list table.
import_upload_size_limit	Filter	Filters the maximum allowed upload size for import files.
postmeta_form_keys	Filter	Filters values for the meta key dropdown in the Custom Fields meta box.
postmeta_form_limit	Filter	Filters the number of custom fields to retrieve for the drop-down in the Custom Fields meta box.

wp-admin / includes / theme.php

WordPress Theme Administration API

Hook	Type	Description
pre_prepare_themes_for_js	Filter	Filters theme data before it is prepared for JavaScript.

wp-admin / includes / update.php

WordPress Administration Update API

Hook	Type	Description
in_plugin_update_message-{$file}	Action	Fires at the end of the update message container in each row of the plugins list table.
in_theme_update_message-{$theme_key}	Action	Fires at the end of the update message container in each row of the themes list table.

wp-admin / includes / upgrade.php

WordPress Upgrade API Most of the functions are pluggable and can be overwritten.

Hook	Type	Description
dbdelta_create_queries	Filter	Filters the dbDelta SQL queries for creating tables and/or databases.
dbdelta_insert_queries	Filter	Filters the dbDelta SQL queries for inserting or updating.
dbdelta_queries	Filter	Filters the dbDelta SQL queries.

wp-admin / includes / user.php

WordPress user administration API.

Hook	Type	Description
check_passwords	Action	Fires before the password and confirm password fields are checked for congruity.
deleted_user	Action	Fires immediately after a user is deleted from the database.
delete_user	Action	Fires immediately before a user is deleted from the database.
editable_roles	Filter	Filters the list of editable roles.
edit_user_created_user	Action	Fires after a new user has been created.
get_users_drafts	Filter	Filters the user’s drafts query string.
post_types_to_delete_with_user	Filter	Filters the list of post types to delete with a user.

wp-admin / media-upload.php

Manage media uploaded file. There are many filters in here for media. Plugins can extend functionality by hooking into the filters.

Hook	Type	Description
media_upload_default_tab	Filter	Filters the default tab in the legacy (pre-3.5.0) media popup.
media_upload_default_type	Filter	Filters the default media upload type in the legacy (pre-3.5.0) media popup.
media_upload_{$tab}	Action	Fires inside limited and specific upload-tab views in the legacy (pre-3.5.0) media popup.
media_upload_{$type}	Action	Fires inside specific upload-type views in the legacy (pre-3.5.0) media popup based on the current tab.

wp-admin / menu-header.php

Displays Administration Menu.

Hook	Type	Description
adminmenu	Action	Fires after the admin menu has been output.
parent_file	Filter	Filters the parent file of an admin menu sub-menu item.

wp-admin / ms-delete-site.php

Multisite delete site panel.

Hook	Type	Description
delete_site_email_content	Filter	Filters the email content sent when a site in a Multisite network is deleted.

wp-admin / my-sites.php

My Sites dashboard.

Hook	Type	Description
myblogs_allblogs_options	Action	Fires before the sites list on the My Sites screen.
myblogs_blog_actions	Filter	Filters the row links displayed for each site on the My Sites screen.
myblogs_options	Filter	Enable the Global Settings section on the My Sites screen.

wp-admin / nav-menus.php

WordPress Administration for Navigation Menus Interface functions

Hook	Type	Description
after_menu_locations_table	Action	Fires after the menu locations table is displayed.

wp-admin / network / admin.php

WordPress Network Administration Bootstrap

Hook	Type	Description
redirect_network_admin_request	Filter	Filters whether to redirect the request to the Network Admin.

wp-admin / network / edit.php

Action handler for Multisite administration panels.

Hook	Type	Description
network_admin_edit_{$action}	Action	Fires the requested handler action.
network_admin_edit_{$_GET[‘action’]}	Action	Fires the requested handler action.

wp-admin / network / settings.php

Multisite network settings administration panel.

Hook	Type	Description
mu_menu_items	Filter	Filters available network-wide administration menu options.

wp-admin / network / site-new.php

Add Site Administration Screen

Hook	Type	Description
network_site_new_created_user	Action	Fires after a new user has been created via the network site-new.php page.
network_site_new_form	Action	Fires at the end of the new site form in network admin.
pre_network_site_new_created_user	Action	Fires immediately before a new user is created via the network site-new.php page.

wp-admin / network / site-themes.php

Edit Site Themes Administration Screen

Hook	Type	Description
‘handle_network_bulk_actions-‘ . get_current_screen()->id	Filter	Fires when a custom bulk action should be handled.
handle_network_bulk_actions-{$screen}	Filter	Fires when a custom bulk action should be handled.

wp-admin / network / site-users.php

Edit Site Users Administration Screen

Hook	Type	Description
network_site_users_after_list_table	Action	Fires after the list table on the Users screen in the Multisite Network Admin.
network_site_users_created_user	Action	Fires after a user has been created via the network site-users.php page.

wp-admin / network / sites.php

Multisite sites administration panel.

Hook	Type	Description
activate_blog	Action	Fires after a network site is activated.
deactivate_blog	Action	Fires before a network site is deactivated.
network_sites_updated_message_{$action}	Filter	Filters a specific, non-default, site-updated message in the Network admin.
network_sites_updated_message_{$_GET[‘updated’]}	Filter	Filters a specific, non-default site-updated message in the Network admin.

wp-admin / network / upgrade.php

Multisite upgrade administration panel.

Hook	Type	Description
after_mu_upgrade	Action	Fires after the Multisite DB upgrade for each site is complete.

wp-admin / network / user-new.php

Add New User network administration panel.

Hook	Type	Description
network_user_new_created_user	Action	Fires after a new user has been created via the network user-new.php page.
network_user_new_form	Action	Fires at the end of the new user form in network admin.

wp-admin / options-discussion.php

Discussion settings administration panel.

Hook	Type	Description
avatar_defaults	Filter	Filters the default avatars.
default_avatar_select	Filter	Filters the HTML output of the default avatar list.

wp-admin / options-general.php

General settings administration panel.

Hook	Type	Description
date_formats	Filter	Filters the default date formats.

wp-admin / options-permalink.php

Permalink Settings Administration Screen.

Hook	Type	Description
available_permalink_structure_tags	Filter	Filters the list of available permalink structure tags on the Permalinks settings page.

wp-admin / options-reading.php

Reading settings administration panel.

Hook	Type	Description
blog_privacy_selector	Action	Enable the legacy ‘Site Visibility’ privacy options.

wp-admin / options-writing.php

Writing settings administration panel.

Hook	Type	Description
enable_update_services_configuration	Filter	Filters whether to enable the Update Services section in the Writing settings screen.

wp-admin / options.php

Options Management Administration Screen. If accessed directly in a browser this page shows a list of all saved options along with editable fields for their values. Serialized data is not supported and there is no way to remove options via this page. It is not linked to from anywhere else in the admin. This file is also the target of the forms in core and custom options pages that use the Settings API. In this case it saves the new option values and returns the user to their page of origin.

Hook	Type	Description
enable_post_by_email_configuration	Filter	Filters whether the post-by-email functionality is enabled.
option_page_capability_{$option_page}	Filter	Filters the capability required when using the Settings API.

wp-admin / plugin-install.php

Install plugin administration panel.

Hook	Type	Description
install_plugins_pre_{$tab}	Action	Fires before each tab on the Install Plugins screen is loaded.
install_plugins_{$tab}	Action	Fires after the plugins list table in each tab of the Install Plugins screen.

wp-admin / plugins.php

Plugins administration panel.

Hook	Type	Description
pre_current_active_plugins	Action	Fires before the plugins list table is rendered.

wp-admin / post.php

Edit post administration panel. Manage Post actions: post, edit, delete, etc.

Hook	Type	Description
post_action_{$action}	Action	Fires for a given custom post action request.
replace_editor	Filter	Allows replacement of the editor.

wp-admin / press-this.php

Press This Display and Handler.

Hook	Type	Description
admin_head-press-this.php	Action	Fires in the head tag on the Press This admin page.
admin_print_scripts-press-this.php	Action	Fires when scripts are printed for the Press This admin page.
admin_print_styles-press-this.php	Action	Fires when styles are printed for the Press This admin page.

wp-admin / theme-install.php

Install theme administration panel.

Hook	Type	Description
install_themes_pre_{$tab}	Action	Fires before each of the tabs are rendered on the Install Themes page.
install_themes_tabs	Filter	Filters the tabs shown on the Add Themes screen.
install_themes_{$tab}	Action	Fires at the top of each of the tabs on the Install Themes page.

wp-admin / update-core.php

Update Core administration panel.

Hook	Type	Description
core_upgrade_preamble	Action	Fires after the core, plugin, and theme update tables.

wp-admin / user-edit.php

Edit user administration panel.

Hook	Type	Description
additional_capabilities_display	Filter	Filters whether to display additional capabilities for the user.
admin_color_scheme_picker	Action	Fires in the ‘Admin Color Scheme’ section of the user editing screen.
edit_user_profile	Action	Fires after the ‘About the User’ settings table on the ‘Edit User’ screen.
edit_user_profile_update	Action	Fires before the page loads on the ‘Edit User’ screen.
enable_edit_any_user_configuration	Filter	Filters whether to allow administrators on Multisite to edit every user.
personal_options	Action	Fires at the end of the ‘Personal Options’ settings table on the user editing screen.
personal_options_update	Action	Fires before the page loads on the ‘Your Profile’ editing screen.
profile_personal_options	Action	Fires after the ‘Personal Options’ settings table on the ‘Your Profile’ editing screen.

wp-admin / user-new.php

New User Administration Screen.

Hook	Type	Description
autocomplete_users_for_site_admins	Filter	Filters whether to enable user auto-complete for non-super admins in Multisite.
invite_user	Action	Fires immediately after a user is invited to join a site, but before the notification is sent.

wp-admin / user / admin.php

WordPress User Administration Bootstrap

Hook	Type	Description
redirect_user_admin_request	Filter	Filters whether to redirect the request to the User Admin in Multisite.

wp-admin / users.php

User administration panel

Hook	Type	Description
delete_user_form	Action	Fires at the end of the delete users form prior to the confirm button.

wp-admin / widgets.php

Widget administration panel

Hook	Type	Description
delete_widget	Action	Fires immediately after a widget has been marked for deletion.

wp-comments-post.php

Handles Comment Post to WordPress and prevents duplicate comment posting.

Hook	Type	Description
comment_post_redirect	Filter	Filters the location URI to send the commenter after posting.

wp-includes / admin-bar.php

Toolbar API: Top-level Toolbar functionality

Hook	Type	Description
admin_bar_menu	Action	Load all necessary admin bar items.

wp-includes / author-template.php

Author Template functions for use in themes. These functions must be used within the WordPress Loop.

Hook	Type	Description
author_link	Filter	Filters the URL to the author’s page.
get_the_author_{$field}	Filter	Filters the value of the requested user metadata.
is_multi_author	Filter	Filters whether the site has more than one author with published posts.

wp-includes / blocks.php

Functions related to registering and parsing blocks.

Hook	Type	Description
block_parser_class	Filter	Filter to allow plugins to replace the server-side block parser
excerpt_allowed_blocks	Filter	Filters the list of blocks that can contribute to the excerpt.
pre_render_block	Filter	Allows render_block() to be shortcircuited, by returning a non-null value.
render_block	Filter	Filters the content of a single block.
render_block_data	Filter	Filters the block being rendered in render_block(), before it’s processed.

wp-includes / bookmark-template.php

Bookmark Template Functions for usage in Themes

Hook	Type	Description
link_category	Filter	Filters the bookmarks category name.

wp-includes / bookmark.php

Link/Bookmark API

Hook	Type	Description
get_bookmarks	Filter	Filters the returned list of bookmarks.

wp-includes / canonical.php

Canonical API to handle WordPress Redirecting Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference" by Mark Jaquith

Hook	Type	Description
redirect_canonical	Filter	Filters the canonical redirect URL.

wp-includes / capabilities.php

Core User Role & Capabilities API

Hook	Type	Description
auth_post_meta_{$meta_key}	Filter	Filters whether the user is allowed to add post meta to a post.
auth_post_{$post_type}_meta_{$meta_key}	Filter	Filters whether the user is allowed to add post meta to a post of a given type.
auth_{$object_type}_meta_{$meta_key}	Filter	Filters whether the user is allowed to edit a specific meta key of a specific object type.
auth_{$object_type}_meta_{$meta_key}_for_{$object_subtype}	Filter	Filters whether the user is allowed to edit a specific meta key of a specific object type and subtype.
auth_{$object_type}_{$object_subtype}_meta_{$meta_key}	Action	Filter Hook (deprecated): Filters whether the user is allowed to edit meta for specific object types/subtypes.
auth_{$object_type}_{$sub_type}_meta_{$meta_key}	Filter	Filters whether the user is allowed to add post meta to a post of a given type.
granted_super_admin	Action	Fires after the user is granted Super Admin privileges.
grant_super_admin	Action	Fires before the user is granted Super Admin privileges.
map_meta_cap	Filter	Filters a user’s capabilities depending on specific context and/or privilege.
revoked_super_admin	Action	Fires after the user’s Super Admin privileges are revoked.
revoke_super_admin	Action	Fires before the user’s Super Admin privileges are revoked.

wp-includes / category-template.php

Taxonomy API: Core category-specific template tags

Hook	Type	Description
get_the_categories	Filter	Filters the array of categories to return for a post.
get_the_tags	Filter	Filters the array of tags for the given post.
get_the_terms	Filter	Filters the list of terms attached to the given post.
list_cats	Filter	Filters a taxonomy drop-down display element.

wp-includes / category.php

Taxonomy API: Core category-specific functionality

Hook	Type	Description
get_categories_taxonomy	Filter	Filters the taxonomy used to retrieve terms when calling get_categories().
get_tags	Filter	Filters the array of term objects returned for the ‘post_tag’ taxonomy.

wp-includes / class-http.php

HTTP API: WP_Http class

Hook	Type	Description
block_local_requests	Filter	Filters whether to block local requests through the proxy.
https_ssl_verify	Filter	Filters whether SSL should be verified for non-local requests.
http_api_debug	Action	Fires after an HTTP API response is received and before the response is returned.
http_api_transports	Filter	Filters which HTTP transports are available and in what order.
http_headers_useragent	Filter	Filters the user agent value sent with an HTTP request.
http_request_args	Filter	Filters the arguments used in an HTTP request.
http_request_redirection_count	Filter	Filters the number of redirects allowed during an HTTP request.
http_request_reject_unsafe_urls	Filter	Filters whether to pass URLs through wp_http_validate_url() in an HTTP request.
http_request_timeout	Filter	Filters the timeout value for an HTTP request.
http_request_version	Filter	Filters the version of the HTTP protocol used in a request.
http_response	Filter	Filters the HTTP API response immediately before the response is returned.
pre_http_request	Filter	Filters whether to preempt an HTTP request’s return value.

wp-includes / class-oembed.php

API for fetching the HTML to embed remote content based on a provided URL Used internally by the WP_Embed class, but is designed to be generic.

Hook	Type	Description
oembed_dataparse	Filter	Filters the returned oEmbed HTML.
oembed_fetch_url	Filter	Filters the oEmbed URL to be fetched.
oembed_linktypes	Filter	Filters the link types that contain oEmbed provider URLs.
oembed_providers	Filter	Filters the list of whitelisted oEmbed providers.
oembed_remote_get_args	Filter	Filters oEmbed remote get arguments.
oembed_result	Filter	Filters the HTML returned by the oEmbed provider.
pre_oembed_result	Filter	Filters the oEmbed result before any HTTP requests are made.

wp-includes / class-walker-category.php

Taxonomy API: Walker_Category class

Hook	Type	Description
category_css_class	Filter	Filters the list of CSS classes to include with each category in the list.
category_description	Filter	Filters the category description for display.
category_list_link_attributes	Filter	Filters the HTML attributes applied to a category list item’s anchor element.

wp-includes / class-walker-nav-menu.php

Nav Menu API: Walker_Nav_Menu class

Hook	Type	Description
nav_menu_css_class	Filter	Filters the CSS class(es) applied to a menu item’s list item element.
nav_menu_item_args	Filter	Filters the arguments for a single nav menu item.
nav_menu_item_id	Filter	Filters the ID applied to a menu item’s list item element.
nav_menu_item_title	Filter	Filters a menu item’s title.
nav_menu_link_attributes	Filter	Filters the HTML attributes applied to a menu item’s anchor element.
nav_menu_submenu_css_class	Filter	Filters the CSS class(es) applied to a menu list element.

wp-includes / class-walker-page-dropdown.php

Post API: Walker_PageDropdown class

Hook	Type	Description
list_pages	Filter	Filters the page title when creating an HTML drop-down list of pages.

wp-includes / class-walker-page.php

Post API: Walker_Page class

Hook	Type	Description
page_css_class	Filter	Filters the list of CSS classes to include with each page item in the list.
page_menu_link_attributes	Filter	Filters the HTML attributes applied to a page menu item’s anchor element.

wp-includes / class-wp-admin-bar.php

Toolbar API: WP_Admin_Bar class

Hook	Type	Description
add_admin_bar_menus	Action	Fires after menus are added to the menu bar.
admin_bar_init	Action	Fires after WP_Admin_Bar is initialized.

wp-includes / class-wp-comment-query.php

Comment API: WP_Comment_Query class

Hook	Type	Description
comments_clauses	Filter	Filters the comment query clauses.
found_comments_query	Filter	Filters the query used to retrieve found comment count.
parse_comment_query	Action	Fires after the comment query vars have been parsed.
pre_get_comments	Action	Fires before comments are retrieved.

wp-includes / class-wp-customize-control.php

WordPress Customize Control classes

Hook	Type	Description
customize_control_active	Filter	Filters response of WP_Customize_Control::active().
customize_render_control	Action	Fires just before the current Customizer control is rendered.
customize_render_control_{$this->id}	Action	Fires just before a specific Customizer control is rendered.

wp-includes / class-wp-customize-manager.php

WordPress Customize Manager classes

Hook	Type	Description
customize_allowed_urls	Filter	Filters the list of URLs allowed to be clicked and followed in the Customizer preview.
customize_changeset_branching	Filter	Filters whether or not changeset branching is allowed.
customize_changeset_save_data	Filter	Filters the settings’ data that will be persisted into the changeset.
customize_dynamic_setting_args	Filter	Filters a dynamic setting’s constructor args.
customize_dynamic_setting_class	Filter	Allow non-statically created settings to be constructed with custom WP_Customize_Setting subclass.
customize_loaded_components	Filter	Filters the core Customizer components to load.
customize_load_themes	Filter	Filters the theme data loaded in the customizer.
customize_post_value_set	Action	Announce when any setting’s unsanitized post value has been set.
customize_post_value_set_{$setting_id}	Action	Announce when a specific setting’s unsanitized post value has been set.
customize_previewable_devices	Filter	Filters the available devices to allow previewing in the Customizer.
customize_preview_init	Action	Fires once the Customizer preview has initialized and JavaScript settings have been printed.
customize_refresh_nonces	Filter	Filters nonces for Customizer.
customize_register	Action	Fires once WordPress has loaded, allowing scripts and styles to be initialized.
customize_save	Action	Fires once the theme has switched in the Customizer, but before settings have been saved.
customize_save_after	Action	Fires after Customize settings have been saved.
customize_save_response	Filter	Filters response data for a successful customize_save Ajax request.
customize_save_validation_before	Action	Fires before save validation happens.

wp-includes / class-wp-customize-nav-menus.php

WordPress Customize Nav Menus classes

Hook	Type	Description
customize_nav_menu_available_items	Filter	Filters the available menu items.
customize_nav_menu_available_item_types	Filter	Filters the available menu item types.
customize_nav_menu_searched_items	Filter	Filters the available menu items during a search request.

wp-includes / class-wp-customize-panel.php

WordPress Customize Panel classes

Hook	Type	Description
customize_panel_active	Filter	Filters response of WP_Customize_Panel::active().
customize_render_panel	Action	Fires before rendering a Customizer panel.
customize_render_panel_{$this->id}	Action	Fires before rendering a specific Customizer panel.

wp-includes / class-wp-customize-section.php

WordPress Customize Section classes

Hook	Type	Description
customize_render_section	Action	Fires before rendering a Customizer section.
customize_render_section_{$this->id}	Action	Fires before rendering a specific Customizer section.
customize_section_active	Filter	Filters response of WP_Customize_Section::active().

wp-includes / class-wp-customize-setting.php

WordPress Customize Setting classes

Hook	Type	Description
customize_preview_{$this->id}	Action	Fires when the WP_Customize_Setting::preview() method is called for settings not handled as theme_mods or options.
customize_preview_{$this->type}	Action	Fires when the WP_Customize_Setting::preview() method is called for settings not handled as theme_mods or options.
customize_sanitize_js_{$this->id}	Filter	Filters a Customize setting value for use in JavaScript.
customize_sanitize_{$this->id}	Filter	Filters a Customize setting value in un-slashed form.
customize_save_{$id_base}	Action	Fires when the WP_Customize_Setting::save() method is called.
customize_save_{$this->id_data[‘base’]}	Action	Fires when the WP_Customize_Setting::save() method is called.
customize_update_{$this->type}	Action	Fires when the WP_Customize_Setting::update() method is called for settings not handled as theme_mods or options.
customize_validate_{$this->id}	Filter	Validates a Customize setting value.
customize_value_{$id_base}	Filter	Filters a Customize setting value not handled as a theme_mod or option.
customize_value_{$this->id_data[‘base’]}	Filter	Filter a Customize setting value not handled as a theme_mod or option.

wp-includes / class-wp-customize-widgets.php

WordPress Customize Widgets classes

Hook	Type	Description
customizer_widgets_section_args	Filter	Filters Customizer widget section arguments for a given sidebar.
is_wide_widget_in_customizer	Filter	Filters whether the given widget is considered “wide”.

wp-includes / class-wp-editor.php

Facilitates adding of the WordPress editor as used on the Write and Edit screens. Private, not included by default. See wp_editor() in wp-includes/general-template.php.

Hook	Type	Description
after_wp_tiny_mce	Action	Fires after any core TinyMCE editor instances are created.
before_wp_tiny_mce	Action	Fires immediately before the TinyMCE settings are printed.
mce_buttons	Filter	Filters the first-row list of TinyMCE buttons (Visual tab).
mce_buttons_2	Filter	Filters the second-row list of TinyMCE buttons (Visual tab).
mce_buttons_3	Filter	Filters the third-row list of TinyMCE buttons (Visual tab).
mce_buttons_4	Filter	Filters the fourth-row list of TinyMCE buttons (Visual tab).
mce_css	Filter	Filters the comma-delimited list of stylesheets to load in TinyMCE.
mce_external_languages	Filter	Filters the translations loaded for external TinyMCE 3.x plugins.
mce_external_plugins	Filter	Filters the list of TinyMCE external plugins.
media_buttons	Action	Fires after the default media button(s) are displayed.
print_default_editor_scripts	Action	Fires when the editor scripts are loaded for later initialization, after all scripts and settings are printed.
quicktags_settings	Filter	Filters the Quicktags settings.

wp-includes / class-wp-embed.php

API for easily embedding rich media such as videos and images into content.

Hook	Type	Description
embed_cache_oembed_types	Filter	Filters the array of post types to cache oEmbed results for.
embed_handler_html	Filter	Filters the returned embed handler.
embed_maybe_make_link	Filter	Filters the returned, maybe-linked embed URL.
embed_oembed_discover	Filter	Filters whether to inspect the given URL for discoverable link tags.
embed_oembed_html	Filter	Filters the cached oEmbed HTML.
oembed_ttl	Filter	Filters the oEmbed TTL value (time to live).

wp-includes / class-wp-http-curl.php

HTTP API: WP_Http_Curl class

Hook	Type	Description
http_api_curl	Action	Fires before the cURL request is executed.

wp-includes / class-wp-http-proxy.php

HTTP API: WP_HTTP_Proxy class

Hook	Type	Description
pre_http_send_through_proxy	Filter	Filters whether to preempt sending the request through the proxy server.

wp-includes / class-wp-http-requests-hooks.php

HTTP API: Requests hook bridge class

Hook	Type	Description
requests-{$hook}	Action	Transforms a native Request hook to a WordPress actions.

wp-includes / class-wp-http-streams.php

HTTP API: WP_Http_Streams class

Hook	Type	Description
https_local_ssl_verify	Filter	Filters whether SSL should be verified for local requests.

wp-includes / class-wp-image-editor-gd.php

WordPress GD Image Editor

Hook	Type	Description
image_make_intermediate_size	Filter	Filters the name of the saved image file.

wp-includes / class-wp-image-editor-imagick.php

WordPress Imagick Image Editor

Hook	Type	Description
image_strip_meta	Filter	Filters whether to strip metadata from images when they’re resized.

wp-includes / class-wp-image-editor.php

Base WordPress Image Editor

Hook	Type	Description
image_editor_default_mime_type	Filter	Filters default mime type prior to getting the file extension.
jpeg_quality	Filter	Filters the JPEG compression quality for backward-compatibility.

wp-includes / class-wp-locale-switcher.php

Locale API: WP_Locale_Switcher class

Hook	Type	Description
change_locale	Action	Fires when the locale is switched to or restored.
restore_previous_locale	Action	Fires when the locale is restored to the previous one.

wp-includes / class-wp-meta-query.php

Meta API: WP_Meta_Query class

Hook	Type	Description
get_meta_sql	Filter	Filters the meta query’s generated SQL.
meta_query_find_compatible_table_alias	Filter	Filters the table alias identified as compatible with the current clause.

wp-includes / class-wp-metadata-lazyloader.php

Meta API: WP_Metadata_Lazyloader class

Hook	Type	Description
metadata_lazyloader_queued_objects	Action	Fires after objects are added to the metadata lazy-load queue.

wp-includes / class-wp-network-query.php

Network API: WP_Network_Query class

Hook	Type	Description
found_networks_query	Filter	Filters the query used to retrieve found network count.
networks_clauses	Filter	Filters the network query clauses.
networks_pre_query	Filter	Filter the sites array before the query takes place.
parse_network_query	Action	Fires after the network query vars have been parsed.
pre_get_networks	Action	Fires before networks are retrieved.

wp-includes / class-wp-network.php

Network API: WP_Network class

Hook	Type	Description
network_by_path_segments_count	Filter	Filters the number of path segments to consider when searching for a site.
pre_get_main_site_id	Filter	Filters the main site ID.
pre_get_network_by_path	Filter	Determine a network by its domain and path.

wp-includes / class-wp-oembed-controller.php

WP_oEmbed_Controller class, used to provide an oEmbed endpoint.

Hook	Type	Description
oembed_default_width	Filter	Filters the maxwidth oEmbed parameter.
oembed_request_post_id	Filter	Filters the determined post ID.
rest_oembed_ttl	Filter	Filters the oEmbed TTL value (time to live).

wp-includes / class-wp-post-type.php

Post API: WP_Post_Type class

Hook	Type	Description
register_post_type_args	Filter	Filters the arguments for registering a post type.

wp-includes / class-wp-query.php

Query API: WP_Query class

Hook	Type	Description
comment_feed_groupby	Filter	Filters the GROUP BY clause of the comments feed query before sending.
comment_feed_join	Filter	Filters the JOIN clause of the comments feed query before sending.
comment_feed_limits	Filter	Filters the LIMIT clause of the comments feed query before sending.
comment_feed_orderby	Filter	Filters the ORDER BY clause of the comments feed query before sending.
comment_feed_where	Filter	Filters the WHERE clause of the comments feed query before sending.
comment_loop_start	Action	Fires once the comment loop is started.
content_pagination	Filter	Filters the “pages” derived from splitting the post content.
found_posts	Filter	Filters the number of found posts for the query.
found_posts_query	Filter	Filters the query to run for retrieving the found posts.
loop_end	Action	Fires once the loop has ended.
loop_no_results	Action	Fires if no results are found in a post query.
loop_start	Action	Fires once the loop is started.
parse_query	Action	Fires after the main query vars have been parsed.
parse_tax_query	Action	Fires after taxonomy-related query vars have been parsed.
posts_clauses	Filter	Filters all query clauses at once, for convenience.
posts_clauses_request	Filter	Filters all query clauses at once, for convenience.
posts_distinct	Filter	Filters the DISTINCT clause of the query.
posts_distinct_request	Filter	Filters the DISTINCT clause of the query.
posts_fields	Filter	Filters the SELECT clause of the query.
posts_fields_request	Filter	Filters the SELECT clause of the query.
posts_groupby	Filter	Filters the GROUP BY clause of the query.
posts_groupby_request	Filter	Filters the GROUP BY clause of the query.
posts_join	Filter	Filters the JOIN clause of the query.
posts_join_paged	Filter	Filters the JOIN clause of the query.
posts_join_request	Filter	Filters the JOIN clause of the query.
posts_orderby	Filter	Filters the ORDER BY clause of the query.
posts_orderby_request	Filter	Filters the ORDER BY clause of the query.
posts_pre_query	Filter	Filters the posts array before the query takes place.
posts_request	Filter	Filters the completed SQL query before sending.
posts_request_ids	Filter	Filters the Post IDs SQL request before sending.
posts_results	Filter	Filters the raw post results array, prior to status checks.
posts_search	Filter	Filters the search SQL that is used in the WHERE clause of WP_Query.
posts_search_orderby	Filter	Filters the ORDER BY used when ordering search results.
posts_selection	Action	Fires to announce the query’s current selection parameters.
posts_where	Filter	Filters the WHERE clause of the query.
posts_where_paged	Filter	Filters the WHERE clause of the query.
posts_where_request	Filter	Filters the WHERE clause of the query.
post_limits	Filter	Filters the LIMIT clause of the query.
post_limits_request	Filter	Filters the LIMIT clause of the query.
pre_get_posts	Action	Fires after the query variable object is created, but before the actual query is run.

wp-includes / class-wp-recovery-mode-cookie-service.php

Error Protection API: WP_Recovery_Mode_Cookie_Service class

Hook	Type	Description
recovery_mode_cookie_length	Filter	Filter the length of time a Recovery Mode cookie is valid for.

wp-includes / class-wp-recovery-mode-email-service.php

Error Protection API: WP_Recovery_Mode_Email_Link class

Hook	Type	Description
recovery_email_support_info	Filter	Filters the support message sent with the the fatal error protection email.
recovery_mode_email	Filter	Filter the contents of the Recovery Mode email.

wp-includes / class-wp-recovery-mode-key-service.php

Error Protection API: WP_Recovery_Mode_Key_Service class

Hook	Type	Description
generate_recovery_mode_key	Action	Fires when a recovery mode key is generated.

wp-includes / class-wp-recovery-mode-link-service.php

Error Protection API: WP_Recovery_Mode_Link_Handler class

Hook	Type	Description
recovery_mode_begin_url	Filter	Filter the URL to begin recovery mode.

wp-includes / class-wp-recovery-mode.php

Error Protection API: WP_Recovery_Mode class

Hook	Type	Description
recovery_mode_email_link_ttl	Filter	Filter the amount of time the recovery mode email link is valid for.
recovery_mode_email_rate_limit	Filter	Filter the rate limit between sending new recovery mode email links.

wp-includes / class-wp-rewrite.php

Rewrite API: WP_Rewrite class

Hook	Type	Description
author_rewrite_rules	Filter	Filters rewrite rules used for author archives.
comments_rewrite_rules	Filter	Filters rewrite rules used for comment feed archives.
date_rewrite_rules	Filter	Filters rewrite rules used for date archives.
flush_rewrite_rules_hard	Filter	Filters whether a “hard” rewrite rule flush should be performed when requested.
generate_rewrite_rules	Action	Fires after the rewrite rules are generated.
iis7_url_rewrite_rules	Filter	Filters the list of rewrite rules formatted for output to a web.config.
mod_rewrite_rules	Filter	Filters the list of rewrite rules formatted for output to an .htaccess file.
page_rewrite_rules	Filter	Filters rewrite rules used for “page” post type archives.
permalink_structure_changed	Action	Fires after the permalink structure is updated.
post_rewrite_rules	Filter	Filters rewrite rules used for “post” archives.
rewrite_rules	Filter	Filters the list of rewrite rules formatted for output to an .htaccess file.
rewrite_rules_array	Filter	Filters the full set of generated rewrite rules.
root_rewrite_rules	Filter	Filters rewrite rules used for root-level archives.

wp-includes / class-wp-role.php

User API: WP_Role class

Hook	Type	Description
role_has_cap	Filter	Filters which capabilities a role has.

wp-includes / class-wp-session-tokens.php

Session API: WP_Session_Tokens class

Hook	Type	Description
attach_session_information	Filter	Filters the information attached to the newly created session.

wp-includes / class-wp-site-query.php

Site API: WP_Site_Query class

Hook	Type	Description
found_sites_query	Filter	Filters the query used to retrieve found site count.
parse_site_query	Action	Fires after the site query vars have been parsed.
pre_get_sites	Action	Fires before sites are retrieved.

wp-includes / class-wp-taxonomy.php

Taxonomy API: WP_Taxonomy class

Hook	Type	Description
register_taxonomy_args	Filter	Filters the arguments for registering a taxonomy.

wp-includes / class-wp-term-query.php

Taxonomy API: WP_Term_Query class.

Hook	Type	Description
get_terms_args	Filter	Filters the terms query arguments.
get_terms_defaults	Filter	Filters the terms query default arguments.
get_terms_fields	Filter	Filters the fields to select in the terms query.
get_terms_orderby	Filter	Filters the ORDERBY clause of the terms query.
list_terms_exclusions	Filter	Filters the terms to exclude from the terms query.
parse_term_query	Action	Fires after term query vars have been parsed.
pre_get_terms	Action	Fires before terms are retrieved.

wp-includes / class-wp-theme.php

WP_Theme Class

Hook	Type	Description
allowed_themes	Filter	Filters the array of themes allowed on the network.
network_allowed_themes	Filter	Filters the array of themes allowed on the network.

wp-includes / class-wp-user-query.php

User API: WP_User_Query class

Hook	Type	Description
found_users_query	Filter	Filters SELECT FOUND_ROWS() query for the current WP_User_Query instance.
pre_get_users	Action	Fires before the WP_User_Query has been parsed.
pre_user_query	Action	Fires after the WP_User_Query has been parsed, and before the query is executed.

wp-includes / class-wp-user.php

User API: WP_User class

Hook	Type	Description
add_user_role	Action	Fires immediately after the user has been given a new role.
remove_user_role	Action	Fires immediately after a role as been removed from a user.

wp-includes / class-wp-widget.php

Widget API: WP_Widget base class

Hook	Type	Description
in_widget_form	Action	Fires at the end of the widget control form.

wp-includes / class-wp-xmlrpc-server.php

XML-RPC protocol support for WordPress

Hook	Type	Description
pingback_ping_source_uri	Filter	Filters the pingback source URI.
pingback_post	Action	Fires after a post pingback has been sent.
pre_remote_source	Filter	Filters the pingback remote source.
pre_upload_error	Filter	Filters whether to preempt the XML-RPC media upload.

wp-includes / class-wp.php

WordPress environment setup class.

Hook	Type	Description
do_parse_request	Filter	Filters whether to parse the request.
parse_request	Action	Fires once all query variables for the current request have been parsed.
pre_handle_404	Filter	Filters whether to short-circuit default header status handling.
query_string	Filter	Filters the query string before parsing.
query_vars	Filter	Filters the query variables whitelist before processing.
request	Filter	Filters the array of parsed query variables.

wp-includes / class.wp-scripts.php

Dependencies API: WP_Scripts class

Hook	Type	Description
print_scripts_array	Filter	Filters the list of script dependencies left to print.

wp-includes / class.wp-styles.php

Dependencies API: WP_Styles class

Hook	Type	Description
print_styles_array	Filter	Filters the array of enqueued styles before processing for output.

wp-includes / comment-template.php

Comment template functions These functions are meant to live inside of the WordPress loop.

Hook	Type	Description
author_email	Filter	Filters the comment author’s email for display.
cancel_comment_reply_link	Filter	Filters the cancel comment reply link HTML.
comments_array	Filter	Filters the comments array.
comments_number	Filter	Filters the comments count for display.
comments_open	Filter	Filters whether the current post is open for comments.
comments_popup_link_attributes	Filter	Filters the comments link attributes for display.
comments_template	Filter	Filters the path to the theme template file used for the comments template.
comments_template_query_args	Filter	Filters the arguments used to query comments in comments_template().
comment_author	Filter	Filters the comment author’s name for display.
comment_class	Filter	Filters the returned CSS classes for the current comment.
comment_email	Filter	Filters the comment author’s email for display.
comment_excerpt	Filter	Filters the comment excerpt for display.
comment_excerpt_length	Filter	Filters the amount of words used in the comment excerpt.
comment_form	Action	Fires at the bottom of the comment form, inside the closing
tag.
comment_form_after	Action	Fires after the comment form.
comment_form_after_fields	Action	Fires after the comment fields in the comment form, excluding the textarea.
comment_form_before	Action	Fires before the comment form.
comment_form_before_fields	Action	Fires before the comment fields in the comment form, excluding the textarea.
comment_form_comments_closed	Action	Fires after the comment form if comments are closed.
comment_form_defaults	Filter	Filters the comment form default arguments.
comment_form_default_fields	Filter	Filters the default comment form fields.
comment_form_fields	Filter	Filters the comment form fields, including the textarea.
comment_form_field_comment	Filter	Filters the content of the comment textarea field for display.
comment_form_field_{$name}	Filter	Filters a comment form field for display.
comment_form_logged_in	Filter	Filters the ‘logged in’ message for the comment form for display.
comment_form_logged_in_after	Action	Fires after the is_user_logged_in() check in the comment form.
comment_form_must_log_in_after	Action	Fires after the HTML-formatted ‘must log in after’ message in the comment form.
comment_form_submit_button	Filter	Filters the submit button for the comment form to display.
comment_form_submit_field	Filter	Filters the submit field for the comment form to display.
comment_form_top	Action	Fires at the top of the comment form, inside the form tag.
comment_id_fields	Filter	Filters the returned comment id fields.
comment_reply_link	Filter	Filters the comment reply link.
comment_reply_link_args	Filter	Filters the comment reply link arguments.
comment_text	Filter	Filters the text of a comment to be displayed.
comment_url	Filter	Filters the comment author’s URL for display.
get_comments_link	Filter	Filters the returned post comments permalink.
get_comments_number	Filter	Filters the returned comment count for a post.
get_comment_author	Filter	Filters the returned comment author name.
get_comment_author_email	Filter	Filters the comment author’s returned email address.
get_comment_author_IP	Filter	Filters the comment author’s returned IP address.
get_comment_author_link	Filter	Filters the comment author’s link for display.
get_comment_author_url	Filter	Filters the comment author’s URL.
get_comment_author_url_link	Filter	Filters the comment author’s returned URL link.
get_comment_date	Filter	Filters the returned comment date.
get_comment_excerpt	Filter	Filters the retrieved comment excerpt.
get_comment_ID	Filter	Filters the returned comment ID.
get_comment_link	Filter	Filters the returned single comment permalink.
get_comment_text	Filter	Filters the text of a comment.
get_comment_time	Filter	Filters the returned comment time.
get_comment_type	Filter	Filters the returned comment type.
pings_open	Filter	Filters whether the current post is open for pings.
post_comments_link	Filter	Filters the formatted post comments link HTML.
respond_link	Filter	Filters the respond link when a post has no comments.

wp-includes / comment.php

Core Comment API

Hook	Type	Description
allow_empty_comment	Filter	Filters whether an empty comment should be allowed.
check_comment_flood	Action	Fires immediately before a comment is marked approved.
clean_comment_cache	Action	Fires immediately after a comment has been removed from the object cache.
close_comments_for_post_types	Filter	Filters the list of post types to automatically close comments for.
comment_closed	Action	Fires when a comment is attempted on a post that has comments closed.
comment_cookie_lifetime	Filter	Filters the lifetime of the comment cookie in seconds.
comment_duplicate_message	Filter	Filters duplicate comment error message.
comment_duplicate_trigger	Action	Fires immediately after a duplicate comment is detected.
comment_flood_filter	Filter	Filters the comment flood status.
comment_flood_message	Filter	Filters the comment flood error message.
comment_flood_trigger	Action	Fires before the comment flood message is triggered.
comment_id_not_found	Action	Fires when a comment is attempted on a post that does not exist.
comment_max_links_url	Filter	Filters the number of links found in a comment.
comment_on_draft	Action	Fires when a comment is attempted on a post in draft mode.
comment_on_password_protected	Action	Fires when a comment is attempted on a password-protected post.
comment_on_trash	Action	Fires when a comment is attempted on a trashed post.
comment_post	Action	Fires immediately after a comment is inserted into the database.
comment_save_pre	Filter	Filters the comment content before it is updated in the database.
comment_{$new_status}_{$comment->comment_type}	Action	Fires when the status of a specific comment type is in transition.
comment_{$old_status}_to_{$new_status}	Action	Fires when the comment status is in transition from one specific status to another.
deleted_comment	Action	Fires immediately after a comment is deleted from the database.
delete_comment	Action	Fires immediately before a comment is deleted from the database.
duplicate_comment_id	Filter	Filters the ID, if any, of the duplicate comment found when creating a new comment.
edit_comment	Action	Fires immediately after a comment is updated in the database.
get_comment	Filter	Fires after a comment is retrieved.
get_default_comment_status	Filter	Filters the default comment status for the given post type.
get_page_of_comment	Filter	Filters the calculated page on which a comment appears.
notify_post_author	Filter	Filters whether to send the post author new comment notification emails, overriding the site setting.
pingback_useragent	Filter	Filters the user agent sent when pinging-back a URL.
preprocess_comment	Filter	Filters a comment’s data before it is sanitized and inserted into the database.
pre_comment_approved	Filter	Filters a comment’s approval status before it is set.
pre_comment_author_email	Filter	Filters the comment author’s email cookie before it is set.
pre_comment_author_name	Filter	Filters the comment author’s name cookie before it is set.
pre_comment_author_url	Filter	Filters the comment author’s URL cookie before it is set.
pre_comment_content	Filter	Filters the comment content before it is set.
pre_comment_on_post	Action	Fires before a comment is posted.
pre_comment_user_agent	Filter	Filters the comment author’s browser user agent before it is set.
pre_comment_user_ip	Filter	Filters the comment author’s IP address before it is set.
pre_ping	Action	Fires just before pinging back links found in a post.
pre_user_id	Filter	Filters the comment author’s user id before it is set.
pre_wp_update_comment_count_now	Filter	Filters a post’s comment count before it is updated in the database.

wp-includes / cron.php

WordPress Cron API

Hook	Type	Description
cron_request	Filter	Filters the cron request arguments.
cron_schedules	Filter	Filters the non-default cron schedules.
get_schedule	Filter	Filter the schedule for a hook.
pre_clear_scheduled_hook	Filter	Filter to preflight or hijack clearing a scheduled hook.
pre_get_ready_cron_jobs	Filter	Filter to preflight or hijack retrieving ready cron jobs.
pre_get_scheduled_event	Filter	Filter to preflight or hijack retrieving a scheduled event.
pre_reschedule_event	Filter	Filter to preflight or hijack rescheduling of events.
pre_schedule_event	Filter	Filter to preflight or hijack scheduling an event.
pre_unschedule_event	Filter	Filter to preflight or hijack unscheduling of events.
pre_unschedule_hook	Filter	Filter to preflight or hijack clearing all events attached to the hook.

wp-includes / customize / class-wp-customize-partial.php

Customize API: WP_Customize_Partial class

Hook	Type	Description
customize_partial_render	Filter	Filters partial rendering.
customize_partial_render_{$partial->id}	Filter	Filters partial rendering for a specific partial.

wp-includes / customize / class-wp-customize-selective-refresh.php

Customize API: WP_Customize_Selective_Refresh class

Hook	Type	Description
customize_dynamic_partial_args	Filter	Filters a dynamic partial’s constructor arguments.
customize_dynamic_partial_class	Filter	Filters the class used to construct partials.
customize_render_partials_after	Action	Fires immediately after partials are rendered.
customize_render_partials_before	Action	Fires immediately before partials are rendered.
customize_render_partials_response	Filter	Filters the response from rendering the partials.

wp-includes / date.php

Class for generating SQL clauses that filter a primary query according to date. WP_Date_Query is a helper that allows primary query classes, such as WP_Query, to filter their results by date columns, by generating WHERE subclauses to be attached to the primary SQL query string. Attempting to filter by an invalid date value (eg month=13) will generate SQL that will return no results. In these cases, a _doing_it_wrong() error notice is also thrown. See WP_Date_Query::validate_date_values().

Hook	Type	Description
date_query_valid_columns	Filter	Filters the list of valid date query columns.
get_date_sql	Filter	Filters the date query WHERE clause.

wp-includes / deprecated.php

Deprecated functions from past WordPress versions. You shouldn't use these functions and look for the alternatives instead. The functions will be removed in a later version.

Hook	Type	Description
added_usermeta	Action
attachment_icon	Filter
attachment_innerHTML	Filter
attachment_max_dims	Filter
deleted_usermeta	Action
delete_usermeta	Action
extra_theme_headers	Filter
htmledit_pre	Filter	Filters the text before it is formatted for the HTML editor.
index_rel_link	Filter
parent_post_rel_link	Filter
richedit_pre	Filter	Filters text returned for the rich text editor.

wp-includes / embed.php

oEmbed API: Top-level oEmbed functionality

Hook	Type	Description
embed_defaults	Filter	Filters the default array of embed dimensions.
embed_googlevideo	Filter	Filter the Google Video embed output.
embed_html	Filter	Filters the embed HTML output for a given post.
embed_site_title_html	Filter	Filters the site title HTML in the embed footer.
enqueue_embed_scripts	Action	Fires when scripts and styles are enqueued for the embed iframe.
load_default_embeds	Filter	Filters whether to load the default embed handlers.
oembed_discovery_links	Filter	Filters the oEmbed discovery links HTML.
oembed_endpoint_url	Filter	Filters the oEmbed endpoint URL.
oembed_iframe_title_attribute	Filter	Filters the title attribute of the given oEmbed HTML iframe.
oembed_min_max_width	Filter	Filters the allowed minimum and maximum widths for the oEmbed response.
oembed_response_data	Filter	Filters the oEmbed response data.
post_embed_url	Filter	Filters the URL to embed a specific post.

wp-includes / feed-atom-comments.php

Atom Feed Template for displaying Atom Comments feed.

Hook	Type	Description
atom_comments_ns	Action	Fires inside the feed tag in the Atom comment feed.
comments_atom_head	Action	Fires at the end of the Atom comment feed header.
comment_atom_entry	Action	Fires at the end of each Atom comment feed item.

wp-includes / feed-atom.php

Atom Feed Template for displaying Atom Posts feed.

Hook	Type	Description
atom_author	Action	Fires at the end of each Atom feed author entry.
atom_entry	Action	Fires at the end of each Atom feed item.
atom_head	Action	Fires just before the first Atom feed entry.
atom_ns	Action	Fires at end of the Atom feed root to add namespaces.

wp-includes / feed-rdf.php

RSS 1 RDF Feed Template for displaying RSS 1 Posts feed.

Hook	Type	Description
rdf_header	Action	Fires at the end of the RDF feed header.
rdf_item	Action	Fires at the end of each RDF feed item.
rdf_ns	Action	Fires at the end of the feed root to add namespaces.

wp-includes / feed-rss.php

RSS 0.92 Feed Template for displaying RSS 0.92 Posts feed.

Hook	Type	Description
rss_head	Action	Fires at the end of the RSS Feed Header.
rss_item	Action	Fires at the end of each RSS feed item.

wp-includes / feed-rss2-comments.php

RSS2 Feed Template for displaying RSS2 Comments feed.

Hook	Type	Description
commentrss2_item	Action	Fires at the end of each RSS2 comment feed item.
commentsrss2_head	Action	Fires at the end of the RSS2 comment feed header.
rss2_comments_ns	Action	Fires at the end of the RSS root to add namespaces.

wp-includes / feed-rss2.php

RSS2 Feed Template for displaying RSS2 Posts feed.

Hook	Type	Description
rss2_head	Action	Fires at the end of the RSS2 Feed Header.
rss2_item	Action	Fires at the end of each RSS2 feed item.
rss2_ns	Action	Fires at the end of the RSS root to add namespaces.
rss_tag_pre	Action	Fires between the xml and rss tags in a feed.
rss_update_frequency	Filter	Filters the RSS update frequency.
rss_update_period	Filter	Filters how often to update the RSS feed.

wp-includes / feed.php

WordPress Feed API Many of the functions used in here belong in The Loop, or The Loop for the Feeds.

Hook	Type	Description
atom_enclosure	Filter	Filters the atom enclosure HTML link tag for the current post.
bloginfo_rss	Filter	Filters the bloginfo for display in RSS feeds.
comments_link_feed	Filter	Filters the comments permalink for the current post.
comment_author_rss	Filter	Filters the current comment author for use in a feed.
comment_link	Filter	Filters the current comment’s permalink.
comment_text_rss	Filter	Filters the current comment content for use in a feed.
default_feed	Filter	Filters the default feed type.
feed_content_type	Filter	Filters the content type for a specific feed type.
get_bloginfo_rss	Filter	Filters the bloginfo for use in RSS feeds.
get_feed_build_date	Filter	Filters the date the last post or comment in the query was modified.
get_wp_title_rss	Filter	Filters the blog title for use as the feed title.
rss_enclosure	Filter	Filters the RSS enclosure HTML link tag for the current post.

wp-includes / formatting.php

Main WordPress Formatting API. Handles many functions for formatting output.

Hook	Type	Description
attribute_escape	Filter	Filters a string cleaned and escaped for output in an HTML attribute.
clean_url	Filter	Filters a string cleaned and escaped for output as a URL.
emoji_ext	Filter	Filters the extension of the emoji png files.
emoji_svg_ext	Filter	Filters the extension of the emoji SVG files.
emoji_svg_url	Filter	Filters the URL where emoji SVG images are hosted.
emoji_url	Filter	Filters the URL where emoji png images are hosted.
esc_html	Filter	Filters a string cleaned and escaped for output in HTML.
esc_textarea	Filter	Filters a string cleaned and escaped for output in a textarea element.
excerpt_length	Filter	Filters the number of words in an excerpt.
excerpt_more	Filter	Filters the string in the “more” link displayed after a trimmed excerpt.
format_for_editor	Filter	Filters the text after it is formatted for the editor.
format_to_edit	Filter	Filters the text to be formatted for editing.
human_time_diff	Filter	Filters the human readable difference between two timestamps.
is_email	Filter	Filters whether an email address is valid.
js_escape	Filter	Filters a string cleaned and escaped for output in JavaScript.
no_texturize_shortcodes	Filter	Filters the list of shortcodes not to texturize.
no_texturize_tags	Filter	Filters the list of HTML elements not to texturize.
pre_ent2ncr	Filter	Filters text before named entities are converted into numbered entities.
run_wptexturize	Filter	Filters whether to skip running wptexturize().

wp-includes / functions.php

Main WordPress API

Hook	Type	Description
admin_memory_limit	Filter	Filters the maximum memory limit available for administration screens.
date_i18n	Filter	Filters the date formatted based on the locale.
deprecated_argument_run	Action	Fires when a deprecated argument is called.
deprecated_argument_trigger_error	Filter	Filters whether to trigger an error for deprecated arguments.
deprecated_constructor_run	Action	Fires when a deprecated constructor is called.
deprecated_constructor_trigger_error	Filter	Filters whether to trigger an error for deprecated functions.
deprecated_file_included	Action	Fires when a deprecated file is called.
deprecated_file_trigger_error	Filter	Filters whether to trigger an error for deprecated files.
deprecated_function_run	Action	Fires when a deprecated function is called.
deprecated_function_trigger_error	Filter	Filters whether to trigger an error for deprecated functions.
deprecated_hook_run	Action	Fires when a deprecated hook is called.
deprecated_hook_trigger_error	Filter	Filters whether to trigger deprecated hook errors.
doing_it_wrong_run	Action	Fires when the given function is being used incorrectly.
doing_it_wrong_trigger_error	Filter	Filters whether to trigger an error for _doing_it_wrong() calls.
do_feed_{$feed}	Action	Fires once the given feed is loaded.
do_robotstxt	Action	Fires when displaying the robots.txt file.
enclosure_links	Filter	Filters the list of enclosure links before querying the database.
ext2type	Filter	Filters file type based on the extension name.
extra_{$context}_headers	Filter	Filters extra file headers by context.
getimagesize_mimes_to_exts	Filter	Filters the list mapping image mime types to their respective extensions.
get_main_network_id	Filter	Filters the main network ID.
global_terms_enabled	Filter	Filters whether global terms are enabled.
iis7_supports_permalinks	Filter	Filters whether IIS 7+ supports pretty permalinks.
image_memory_limit	Filter	Filters the memory limit allocated for image manipulation.
kses_allowed_protocols	Filter	Filters the list of protocols allowed in HTML attributes.
load_default_widgets	Filter	Filters whether to load the Widgets library.
mime_types	Filter	Filters the list of mime types and file extensions.
nocache_headers	Filter	Filters the cache-controlling headers.
number_format_i18n	Filter	Filters the number formatted based on the locale.
removable_query_args	Filter	Filters the list of query variables to remove.
robots_txt	Filter	Filters the robots.txt output.

wp-includes / general-template.php

General template tags that can go anywhere in a template.

Hook	Type	Description
bloginfo	Filter	Filters the site information returned by get_bloginfo().
bloginfo_url	Filter	Filters the URL returned by get_bloginfo().
document_title_parts	Filter	Filters the parts of the document title.
document_title_separator	Filter	Filters the separator for the document title.
feed_links_show_comments_feed	Filter	Filters whether to display the comments feed link.
feed_links_show_posts_feed	Filter	Filters whether to display the posts feed link.
getarchives_join	Filter	Filters the SQL JOIN clause for retrieving archives.
getarchives_where	Filter	Filters the SQL WHERE clause for retrieving archives.
get_archives_link	Filter	Filters the archive link content.
get_calendar	Filter	Filters the HTML calendar output.
get_custom_logo	Filter	Filters the custom logo output.
get_footer	Action	Fires before the footer template file is loaded.
get_header	Action	Fires before the header template file is loaded.
get_post_modified_time	Filter	Filters the localized time a post was last modified.
get_post_time	Filter	Filters the localized time a post was written.
get_search_form	Filter	Filters the HTML output of the search form.
get_search_query	Filter	Filters the contents of the search query variable.
get_sidebar	Action	Fires before the sidebar template file is loaded.
get_site_icon_url	Filter	Filters the site icon URL.
get_template_part	Action	Fires before a template part is loaded.
get_template_part_{$slug}	Action	Fires before the specified template part file is loaded.
get_the_archive_description	Filter	Filters the archive description.
get_the_archive_title	Filter	Filters the archive title.
get_the_date	Filter	Filters the date a post was published.
get_the_generator_{$type}	Filter	Filters the HTML for the retrieved generator type.
get_the_modified_date	Filter	Filters the date a post was last modified.
get_the_modified_time	Filter	Filters the localized time a post was last modified.
get_the_post_type_description	Filter	Filters the description for a post type archive.
get_the_time	Filter	Filters the time a post was written.
language_attributes	Filter	Filters the language attributes for display in the html tag.
loginout	Filter	Filters the HTML output for the Log In/Log Out link.
login_form_bottom	Filter	Filters content to display at the bottom of the login form.
login_form_defaults	Filter	Filters the default login form output arguments.
login_form_middle	Filter	Filters content to display in the middle of the login form.
login_form_top	Filter	Filters content to display at the top of the login form.
login_url	Filter	Filters the login URL.
logout_url	Filter	Filters the logout URL.
lostpassword_url	Filter	Filters the Lost Password URL.
paginate_links	Filter	Filters the paginated links for the given archive pages.
post_type_archive_title	Filter	Filters the post type archive title.
pre_get_document_title	Filter	Filters the document title before it is generated.
pre_get_search_form	Action	Fires before the search form is retrieved, at the start of get_search_form().
register	Filter	Filters the HTML link to the Registration or Admin page.
register_url	Filter	Filters the user registration URL.

wp-includes / http.php

Core HTTP Request API Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.

Hook	Type	Description
allowed_http_origin	Filter	Change the allowed HTTP origin result.
allowed_http_origins	Filter	Change the origin types allowed for HTTP requests.
http_origin	Filter	Change the origin of an HTTP request.
http_request_host_is_external	Filter	Check if HTTP request is external or not.

wp-includes / kses.php

kses 0.2.2 - HTML/XHTML filter that only allows some elements and attributes Copyright (C) 2002, 2003, 2005 Ulf Harnhammar This program is free software and open source software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA http://www.gnu.org/licenses/gpl.html [kses strips evil scripts!] Added wp_ prefix to avoid conflicts with existing kses users

Hook	Type	Description
pre_kses	Filter	Filters content to be run through kses.
safe_style_css	Filter	Filters list of allowed CSS attributes.

wp-includes / l10n.php

Core Translation API

Hook	Type	Description
determine_locale	Filter	Filters the locale for the current request.
gettext	Filter	Filters text with its translation.
gettext_with_context	Filter	Filters text with its translation based on context information.
get_available_languages	Filter	Filters the list of available language codes.
load_script_textdomain_relative_path	Filter	Filters the relative path of scripts used for finding translation files.
load_script_translations	Filter	Filters script translations for the given file, script handle and text domain.
load_script_translation_file	Filter	Filters the file path for loading script translations for the given script handle and text domain.
load_textdomain	Action	Fires before the MO translation file is loaded.
load_textdomain_mofile	Filter	Filters MO file path for loading translations for a specific text domain.
locale	Filter	Filters the locale ID of the WordPress installation.
ngettext	Filter	Filters the singular or plural form of a string.
ngettext_with_context	Filter	Filters the singular or plural form of a string with gettext context.
override_load_textdomain	Filter	Filters whether to override the .mo file loading.
override_unload_textdomain	Filter	Filters whether to override the text domain unloading.
plugin_locale	Filter	Filters a plugin’s locale.
pre_determine_locale	Filter	Filters the locale for the current request prior to the default determination process.
pre_load_script_translations	Filter	Pre-filters script translations for the given file, script handle and text domain.

wp-includes / link-template.php

WordPress Link Template Functions

Hook	Type	Description
admin_url	Filter	Filters the admin area URL.
attachment_link	Filter	Filters the permalink for an attachment.
author_feed_link	Filter	Filters the feed link for a given author.
category_feed_link	Filter	Filters the category feed link.
content_url	Filter	Filters the URL to the content directory.
day_link	Filter	Filters the day archive permalink.
edit_bookmark_link	Filter	Filters the bookmark edit link anchor tag.
edit_comment_link	Filter	Filters the comment edit link anchor tag.
edit_post_link	Filter	Filters the post edit link anchor tag.
edit_profile_url	Filter	Filters the URL for a user’s profile editor.
edit_tag_link	Filter	Filters the anchor tag for the edit link for a tag (or term in another taxonomy).
edit_term_link	Filter	Filters the anchor tag for the edit link of a term.
feed_link	Filter	Filters the feed type permalink.
get_avatar_comment_types	Filter	Filters the list of allowed comment types for retrieving avatars.
get_avatar_data	Filter	Filters the avatar data.
get_avatar_url	Filter	Filters the avatar URL.
get_canonical_url	Filter	Filters the canonical URL for a post.
get_comments_pagenum_link	Filter	Filters the comments page number link for the current request.
get_delete_post_link	Filter	Filters the post delete link.
get_edit_bookmark_link	Filter	Filters the bookmark edit link.
get_edit_comment_link	Filter	Filters the comment edit link.
get_edit_post_link	Filter	Filters the post edit link.
get_edit_tag_link	Filter	Filters the edit link for a tag (or term in another taxonomy).
get_edit_term_link	Filter	Filters the edit link for a term.
get_edit_user_link	Filter	Filters the user edit link.
get_pagenum_link	Filter	Filters the page number link for the current request.
get_shortlink	Filter	Filters the shortlink for a post.
get_{$adjacent}_post_excluded_terms	Filter	Filters the IDs of terms excluded from adjacent post queries.
get_{$adjacent}_post_join	Filter	Filters the JOIN clause in the SQL for an adjacent post query.
get_{$adjacent}_post_sort	Filter	Filters the ORDER BY clause in the SQL for an adjacent post query.
get_{$adjacent}_post_where	Filter	Filters the WHERE clause in the SQL for an adjacent post query.
home_url	Filter	Filters the home URL.
includes_url	Filter	Filters the URL to the includes directory.
month_link	Filter	Filters the month archive permalink.
navigation_markup_template	Filter	Filters the navigation markup template.
network_admin_url	Filter	Filters the network admin URL.
network_home_url	Filter	Filters the network home URL.
network_site_url	Filter	Filters the network site URL.
next_comments_link_attributes	Filter	Filters the anchor tag attributes for the next comments page link.
next_posts_link_attributes	Filter	Filters the anchor tag attributes for the next posts page link.
page_link	Filter	Filters the permalink for a page.
parent_theme_file_path	Filter	Filters the path to a file in the parent theme.
parent_theme_file_uri	Filter	Filters the URL to a file in the parent theme.
plugins_url	Filter	Filters the URL to the plugins directory.
post_comments_feed_link	Filter	Filters the post comments feed permalink.
post_comments_feed_link_html	Filter	Filters the post comment feed link anchor tag.
post_link	Filter	Filters the permalink for a post.
post_link_category	Filter	Filters the category that gets used in the %category% permalink token.
post_type_archive_feed_link	Filter	Filters the post type archive feed link.
post_type_archive_link	Filter	Filters the post type archive permalink.
post_type_link	Filter	Filters the permalink for a post of a custom post type.
preview_post_link	Filter	Filters the URL used for a post preview.
previous_comments_link_attributes	Filter	Filters the anchor tag attributes for the previous comments page link.
previous_posts_link_attributes	Filter	Filters the anchor tag attributes for the previous posts page link.
pre_get_avatar_data	Filter	Filters whether to retrieve the avatar URL early.
pre_get_shortlink	Filter	Filters whether to preempt generating a shortlink for the given post.
pre_post_link	Filter	Filters the permalink structure for a post before token replacement occurs.
privacy_policy_url	Filter	Filters the URL of the privacy policy page.

wp-includes / load.php

These functions are needed to load WordPress.

Hook	Type	Description
enable_maintenance_mode	Filter	Filters whether to enable maintenance mode.
enable_wp_debug_mode_checks	Filter	Filters whether to allow the debug mode check to occur.
file_mod_allowed	Filter	Filters whether file modifications are allowed.
is_protected_endpoint	Filter	Filters whether the current request is against a protected endpoint.

wp-includes / media-template.php

WordPress media templates.

Hook	Type	Description
print_media_templates	Action	Fires when the custom Backbone media templates are printed.

wp-includes / media.php

WordPress API for media display.

Hook	Type	Description
attachment_url_to_postid	Filter	Filters an attachment id found by URL.
editor_max_image_size	Filter	Filters the maximum image size dimensions for the editor.
gallery_style	Filter	Filters the default gallery shortcode CSS styles.
get_attached_media	Filter	Filters the list of media attached to the given post.
get_attached_media_args	Filter	Filters arguments used to retrieve media attached to the given post.
get_image_tag	Filter	Filters the HTML content for the image tag.
get_image_tag_class	Filter	Filters the value of the attachment’s image tag class attribute.
get_post_galleries	Filter	Filters the list of all found galleries in the given post.
get_post_gallery	Filter	Filters the first-found post gallery.
image_downsize	Filter	Filters whether to preempt the output of image_downsize().
image_get_intermediate_size	Filter	Filters the output of image_get_intermediate_size()
image_resize_dimensions	Filter	Filters whether to preempt calculating the image resize dimensions.
img_caption_shortcode	Filter	Filters the default caption shortcode output.
img_caption_shortcode_width	Filter	Filters the width of an image’s caption.
intermediate_image_sizes	Filter	Filters the list of intermediate image sizes.
max_srcset_image_width	Filter	Filters the maximum image width to be included in a ‘srcset’ attribute.
media_embedded_in_content_allowed_types	Filter	Filters the embedded media types that are allowed to be returned from the content blob.
media_library_months_with_files	Filter	Allows overriding the list of months displayed in the media library.
media_library_show_audio_playlist	Filter	Allows showing or hiding the “Create Audio Playlist” button in the media library.
media_library_show_video_playlist	Filter	Allows showing or hiding the “Create Video Playlist” button in the media library.
media_view_settings	Filter	Filters the media view settings.
media_view_strings	Filter	Filters the media view strings.
plupload_default_params	Filter	Filters the Plupload default parameters.
plupload_default_settings	Filter	Filters the Plupload default settings.
post_gallery	Filter	Filters the default gallery shortcode output.
post_playlist	Filter	Filters the playlist output.

wp-includes / meta.php

Core Metadata API Functions for retrieving and manipulating metadata of various WordPress object types. Metadata for an object is a represented by a simple key-value pair. Objects may contain multiple metadata entries that share the same key and differ only in their value.

Hook	Type	Description
added_{$meta_type}_meta	Action	Fires immediately after meta of a specific type is added.
add_{$meta_type}_meta	Action	Fires immediately before meta of a specific type is added.
add_{$meta_type}_metadata	Filter	Filters whether to add metadata of a specific type.
deleted_postmeta	Action	Fires immediately after deleting metadata for a post.
deleted_{$meta_type}meta	Action	Fires immediately after deleting post or comment metadata of a specific type.
deleted_{$meta_type}_meta	Action	Fires immediately after deleting metadata of a specific type.
delete_postmeta	Action	Fires immediately before deleting metadata for a post.
delete_{$meta_type}meta	Action	Fires immediately before deleting post or comment metadata of a specific type.
delete_{$meta_type}_meta	Action	Fires immediately before deleting metadata of a specific type.
delete_{$meta_type}_metadata	Filter	Filters whether to delete metadata of a specific type.
delete_{$meta_type}_metadata_by_mid	Filter	Filters whether to delete metadata of a specific type by meta ID.
get_object_subtype_{$object_type}	Filter	Filters the object subtype identifier for a non standard object type.
get_{$meta_type}_metadata	Filter	Filters whether to retrieve metadata of a specific type.
get_{$meta_type}_metadata_by_mid	Filter	Filters whether to retrieve metadata of a specific type by meta ID.
is_protected_meta	Filter	Filters whether a meta key is protected.
register_meta_args	Filter	Filters the registration arguments when registering meta.

wp-includes / ms-blogs.php

Site/blog functions that work with the blogs table and related data.

Hook	Type	Description
blog_details	Action	Filter Hook (deprecated): Filters a blog’s details.
blog_option_{$option}	Filter	Filters a blog option value.

wp-includes / ms-deprecated.php

Deprecated functions from WordPress MU and the multisite feature. You shouldn't use these functions and look for the alternatives instead. The functions will be removed in a later version.

Hook	Type	Description
graceful_fail	Filter
graceful_fail_template	Filter

wp-includes / ms-functions.php

Multisite WordPress API

Hook	Type	Description
added_existing_user	Action	Fires immediately after an existing user is added to a site.
add_user_to_blog	Action	Fires immediately after a user is added to a site.
after_signup_site	Action	Fires after site signup information has been written to the database.
after_signup_user	Action	Fires after a user’s signup information has been written to the database.
blog_redirect_404	Filter	Filters the redirect URL for 404s on the main site.
can_add_user_to_blog	Filter	Filters whether a user should be added to a site.
domain_exists	Filter	Filters whether a site name is taken.
enable_live_network_counts	Filter	Filters whether to update network site or user counts when a new site is created.
get_space_allowed	Filter	Filters the upload quota for the current site.
is_email_address_unsafe	Filter	Filters whether an email address is unsafe.
minimum_site_name_length	Filter	Filters the minimum site name length required when validating a site signup.
network_admin_email_change_email	Filter	Filters the contents of the email notification sent when the network admin email address is changed.
newblogname	Filter	Filters the new site name during registration.
newblog_notify_siteadmin	Filter	Filters the message body of the new site activation email sent to the network administrator.
newuser_notify_siteadmin	Filter	Filters the message body of the new user activation email sent to the network administrator.
new_network_admin_email_content	Filter	Filters the text of the email sent when a change of network admin email address is attempted.
pre_get_space_used	Filter	Filters the amount of storage space used by the current site.
remove_user_from_blog	Action	Fires before a user is removed from a site.

wp-includes / ms-load.php

These functions are needed to load Multisite.

Hook	Type	Description
ms_network_not_found	Action	Fires when a network cannot be found based on the requested domain and path.
ms_site_check	Filter	Filters checking the status of the current blog.
ms_site_not_found	Action	Fires when a network can be determined but a site cannot.
pre_get_site_by_path	Filter	Determine a site by its domain and path.

wp-includes / ms-network.php

Network API

Hook	Type	Description
clean_network_cache	Action	Fires immediately after a network has been removed from the object cache.
get_network	Filter	Fires after a network is retrieved.

wp-includes / ms-settings.php

Used to set up and fix common variables and include the Multisite procedural and class library. Allows for some configuration in wp-config.php (see ms-default-constants.php)

Hook	Type	Description
ms_loaded	Action	Fires after the current site and network have been detected and loaded in multisite’s bootstrap.

wp-includes / ms-site.php

Site API

Hook	Type	Description
archive_blog	Action	Fires when the ‘archived’ status is added to a blog.
clean_site_cache	Action	Fires immediately after a site has been removed from the object cache.
deleted_blog	Action	Action Hook (deprecated): Fires after the site is deleted from the network.
delete_blog	Action	Action Hook (deprecated): Fires before a site is deleted.
get_site	Filter	Fires after a site is retrieved.
make_delete_blog	Action	Fires when the ‘deleted’ status is added to a site.
make_ham_blog	Action	Fires when the ‘spam’ status is removed from a blog.
make_spam_blog	Action	Fires when the ‘spam’ status is added to a blog.
make_undelete_blog	Action	Fires when the ‘deleted’ status is removed from a site.
mature_blog	Action	Fires when the ‘mature’ status is added to a blog.
pre_wp_is_site_initialized	Filter	Filters the check for whether a site is initialized before the database is accessed.
refresh_blog_details	Action	Action Hook (deprecated): Fires after the blog details cache is cleared.

wp-includes / nav-menu-template.php

Nav Menu API: Template functions

Hook	Type	Description
pre_wp_nav_menu	Filter	Filters whether to short-circuit the wp_nav_menu() output.

wp-includes / nav-menu.php

Navigation Menu functions

Hook	Type	Description
has_nav_menu	Filter	Filters whether a nav menu is assigned to the specified location.
nav_menu_attr_title	Filter	Filters a navigation menu item’s title attribute.
nav_menu_description	Filter	Filters a navigation menu item’s description.

wp-includes / option.php

Option API

Hook	Type	Description
added_option	Action	Fires after an option has been added.
add_option	Action	Fires before an option is added.
add_option_{$option}	Action	Fires after a specific option has been added.
add_site_option	Action	Fires after a network option has been successfully added.
add_site_option_{$option}	Action	Fires after a specific network option has been successfully added.
alloptions	Filter	Filters all options after retrieving them.
default_option_{$option}	Filter	Filters the default value for an option.
default_site_option_{$option}	Filter	Filters a specific default network option.
deleted_option	Action	Fires after an option has been deleted.
deleted_site_transient	Action	Fires after a transient is deleted.
deleted_transient	Action	Fires after a transient is deleted.
delete_option	Action	Fires immediately before an option is deleted.
delete_option_{$option}	Action	Fires after a specific option has been deleted.
delete_site_option	Action	Fires after a network option has been deleted.
delete_site_option_{$option}	Action	Fires after a specific network option has been deleted.
delete_site_transient_{$transient}	Action	Fires immediately before a specific site transient is deleted.
delete_transient_{$transient}	Action	Fires immediately before a specific transient is deleted.
expiration_of_site_transient_{$transient}	Filter	Filters the expiration for a site transient before its value is set.
expiration_of_transient_{$transient}	Filter	Filters the expiration for a transient before its value is set.
option_{$option}	Filter	Filters the value of an existing option.
pre_add_site_option_{$option}	Filter	Filters the value of a specific network option before it is added.
pre_cache_alloptions	Filter	Filters all options before caching them.
pre_delete_site_option_{$option}	Action	Fires immediately before a specific network option is deleted.
pre_option_{$option}	Filter	Filters the value of an existing option before it is retrieved.
pre_set_site_transient_{$transient}	Filter	Filters the value of a specific site transient before it is set.
pre_set_transient_{$transient}	Filter	Filters a specific transient before its value is set.
pre_site_option_{$option}	Filter	Filters an existing network option before it is retrieved.
pre_site_transient_{$transient}	Filter	Filters the value of an existing site transient.
pre_transient_{$transient}	Filter	Filters the value of an existing transient.
pre_update_option	Filter	Filters an option before its value is (maybe) serialized and updated.
pre_update_option_{$option}	Filter	Filters a specific option before its value is (maybe) serialized and updated.
pre_update_site_option_{$option}	Filter	Filters a specific network option before its value is updated.
register_setting_args	Filter	Filters the registration arguments when registering a setting.

wp-includes / pluggable.php

These functions can be replaced via plugins. If plugins do not redefine these functions, then these will be used instead.

Hook	Type	Description
allowed_redirect_hosts	Filter	Filters the whitelist of hosts to redirect to.
authenticate	Filter	Filters whether a set of user login credentials are valid.
auth_cookie	Filter	Filters the authentication cookie.
auth_cookie_bad_hash	Action	Fires if a bad authentication cookie hash is encountered.
auth_cookie_bad_session_token	Action
auth_cookie_bad_username	Action	Fires if a bad username is entered in the user authentication process.
auth_cookie_expiration	Filter	Filters the duration of the authentication cookie expiration period.
auth_cookie_expired	Action	Fires once an authentication cookie has expired.
auth_cookie_malformed	Action	Fires if an authentication cookie is malformed.
auth_cookie_valid	Action	Fires once an authentication cookie has been validated.
auth_redirect	Action	Fires before the authentication redirect.
auth_redirect_scheme	Filter	Filters the authentication redirect scheme.
check_admin_referer	Action	Fires once the admin request has been validated or not.
check_ajax_referer	Action	Fires once the Ajax request has been validated or not.
check_password	Filter	Filters whether the plaintext password matches the encrypted password.
clear_auth_cookie	Action	Fires just before the authentication cookies are cleared.
comment_moderation_headers	Filter	Filters the comment moderation email headers.
comment_moderation_recipients	Filter	Filters the list of recipients for comment moderation emails.
comment_moderation_subject	Filter	Filters the comment moderation email subject.
comment_moderation_text	Filter	Filters the comment moderation email text.
comment_notification_headers	Filter	Filters the comment notification email headers.
comment_notification_notify_author	Filter	Filters whether to notify comment authors of their comments on their own posts.
comment_notification_recipients	Filter	Filters the list of email addresses to receive a comment notification.
comment_notification_subject	Filter	Filters the comment notification email subject.
comment_notification_text	Filter	Filters the comment notification email text.
get_avatar	Filter	Filters the avatar to retrieve.
nonce_life	Filter	Filters the lifespan of nonces in seconds.
nonce_user_logged_out	Filter	Filters whether the user who generated the nonce is logged out.
notify_moderator	Filter	Filters whether to send the site moderator email notifications, overriding the site setting.
phpmailer_init	Action	Fires after PHPMailer is initialized.
pre_get_avatar	Filter	Filters whether to retrieve the avatar URL early.
random_password	Filter	Filters the randomly-generated password.
salt	Filter	Filters the WordPress salt.

wp-includes / post-template.php

WordPress Post Template Functions. Gets content for the current post in the loop.

Hook	Type	Description
body_class	Filter	Filters the list of CSS body class names for the current post or page.
get_the_excerpt	Filter	Filters the retrieved post excerpt.
get_the_guid	Filter	Filters the Global Unique Identifier (guid) of the post.
post_class	Filter	Filters the list of CSS class names for the current post.
post_password_required	Filter	Filters whether a post requires the user to supply a password.
prepend_attachment	Filter	Filters the attachment markup to be prepended to the post content.
private_title_format	Filter	Filters the text prepended to the post title of private posts.
protected_title_format	Filter	Filters the text prepended to the post title for protected posts.

wp-includes / post-thumbnail-template.php

WordPress Post Thumbnail Template Functions. Support for post thumbnails. Theme's functions.php must call add_theme_support( 'post-thumbnails' ) to use these.

Hook	Type	Description
begin_fetch_post_thumbnail_html	Action	Fires before fetching the post thumbnail HTML.
end_fetch_post_thumbnail_html	Action	Fires after fetching the post thumbnail HTML.
has_post_thumbnail	Filter	Filters whether a post has a post thumbnail.
post_thumbnail_html	Filter	Filters the post thumbnail HTML.
post_thumbnail_size	Filter	Filters the post thumbnail size.

wp-includes / post.php

Core Post API

Hook	Type	Description
add_attachment	Action	Fires once an attachment has been added.
add_ping	Filter	Filters the new ping URL to add for the given post.
after_delete_post	Action	Fires after a post is deleted, at the conclusion of wp_delete_post().
attachment_updated	Action	Fires once an existing attachment has been updated.
before_delete_post	Action	Fires before a post is deleted, at the start of wp_delete_post().
clean_attachment_cache	Action	Fires after the given attachment’s cache is cleaned.
clean_page_cache	Action	Fires immediately after the given page’s cache is cleaned.
clean_post_cache	Action	Fires immediately after the given post’s cache is cleaned.
deleted_post	Action	Fires immediately after a post is deleted from the database.
delete_attachment	Action	Fires before an attachment is deleted, at the start of wp_delete_attachment().
delete_post	Action	Fires immediately before a post is deleted from the database.
edit_attachment	Action	Fires once an existing attachment has been updated.
edit_post	Action	Fires once an existing post has been updated.
edit_post_{$field}	Filter
edit_post_{$post->post_type}	Action	Fires once an existing post has been updated.
edit_{$field}	Filter	Filters the value of a specific post field to edit.
get_attached_file	Filter	Filters the attached file based on the given ID.
get_enclosed	Filter	Filters the list of enclosures already enclosed for the given post.
get_lastpostdate	Filter	Filters the date the last post was published.
get_lastpostmodified	Filter	Filters the date the last post was modified.
get_pages	Filter	Filters the retrieved list of pages.
get_page_uri	Filter	Filters the URI for a page.
get_post_status	Filter	Filters the post status.
get_pung	Filter	Filters the list of already-pinged URLs for the given post.
get_to_ping	Filter	Filters the list of URLs yet to ping for the given post.
icon_dir	Filter	Filters the icon directory path.
icon_dirs	Filter	Filters the list of icon directory URIs.
icon_dir_uri	Filter	Filters the icon directory URI.
post_mime_types	Filter	Filters the default list of post mime types.
post_stuck	Action	Fires once a post has been added to the sticky list.
post_type_labels_{$post_type}	Filter	Filters the labels of a specific post type.
post_unstuck	Action	Fires once a post has been removed from the sticky list.
post_updated	Action	Fires once an existing post has been updated.
post_{$field}	Filter
pre_delete_post	Filter	Filters whether a post deletion should take place.
pre_get_lastpostmodified	Filter	Pre-filter the return value of get_lastpostmodified() before the query is run.
pre_post_update	Action	Fires immediately before an existing post is updated in the database.
pre_post_{$field}	Filter
pre_trash_post	Filter	Filters whether a post trashing should take place.
pre_untrash_post	Filter	Filters whether a post untrashing should take place.
pre_wp_unique_post_slug	Filter	Filters the post slug before it is generated to be unique.
pre_{$field}	Filter	Filters the value of a specific post field before saving.
private_to_published	Action	Fires when a post’s status is transitioned from private to published.
pub_priv_sql_capability	Filter	Filters the capability to read private posts for a custom post type when generating SQL for getting posts by author.
registered_post_type	Action	Fires after a post type is registered.

wp-includes / query.php

WordPress Query API The query API attempts to get which part of WordPress the user is on. It also provides functionality for getting URL query information.

Hook	Type	Description
old_slug_redirect_post_id	Filter	Filters the old slug redirect post ID.
old_slug_redirect_url	Filter	Filters the old slug redirect URL.

wp-includes / rest-api.php

REST API functions.

Hook	Type	Description
rest_api_init	Action	Fires when preparing to serve an API request.
rest_avatar_sizes	Filter	Filters the REST avatar sizes.
rest_url	Filter	Filters the REST URL.
rest_url_prefix	Filter	Filters the REST URL prefix.

wp-includes / rest-api / class-wp-rest-request.php

REST API: WP_REST_Request class

Hook	Type	Description
rest_request_from_url	Filter	Filters the request generated from a URL.
rest_request_parameter_order	Filter	Filters the parameter order.

wp-includes / rest-api / class-wp-rest-response.php

REST API: WP_REST_Response class

Hook	Type	Description
rest_response_link_curies	Filter	Filters extra CURIEs available on API responses.

wp-includes / rest-api / class-wp-rest-server.php

REST API: WP_REST_Server class

Hook	Type	Description
rest_authentication_errors	Filter	Filters REST authentication errors.
rest_dispatch_request	Filter	Filters the REST dispatch request result.
rest_enabled	Action	Filter Hook (deprecated): Filters whether the REST API is enabled.
rest_endpoints	Filter	Filters the array of available endpoints.
rest_endpoints_description	Filter	Filters the REST endpoint data.
rest_envelope_response	Filter	Filters the enveloped form of a response.
rest_index	Filter	Filters the API root index data.
rest_jsonp_enabled	Filter	Filters whether jsonp is enabled.
rest_namespace_index	Filter	Filters the namespace index data.
rest_post_dispatch	Filter	Filters the API response.
rest_pre_dispatch	Filter	Filters the pre-calculated result of a REST dispatch request.
rest_pre_echo_response	Filter	Filters the API response.
rest_pre_serve_request	Filter	Filters whether the request has already been served.
rest_request_after_callbacks	Filter	Filters the response immediately after executing any REST API callbacks.
rest_request_before_callbacks	Filter	Filters the response before executing any REST API callbacks.
rest_route_data	Filter	Filters the publicly-visible data for routes.
rest_send_nocache_headers	Filter	Send nocache headers on authenticated requests.

wp-includes / rest-api / endpoints / class-wp-rest-attachments-controller.php

REST API: WP_REST_Attachments_Controller class

Hook	Type	Description
rest_after_insert_attachment	Action	Fires after a single attachment is completely created or updated via the REST API.
rest_insert_attachment	Action	Fires after a single attachment is created or updated via the REST API.
rest_prepare_attachment	Filter	Filters an attachment returned from the REST API.

wp-includes / rest-api / endpoints / class-wp-rest-autosaves-controller.php

REST API: WP_REST_Autosaves_Controller class.

Hook	Type	Description
rest_prepare_autosave	Filter	Filters a revision returned from the API.

wp-includes / rest-api / endpoints / class-wp-rest-comments-controller.php

REST API: WP_REST_Comments_Controller class

Hook	Type	Description
rest_after_insert_comment	Action	Fires completely after a comment is created or updated via the REST API.
rest_allow_anonymous_comments	Filter	Filter whether comments can be created without authentication.
rest_comment_collection_params	Filter	Filter collection parameters for the comments controller.
rest_comment_query	Filter	Filters arguments, before passing to WP_Comment_Query, when querying comments via the REST API.
rest_comment_trashable	Filter	Filters whether a comment can be trashed.
rest_delete_comment	Action	Fires after a comment is deleted via the REST API.
rest_insert_comment	Action	Fires after a comment is created or updated via the REST API.
rest_prepare_comment	Filter	Filters a comment returned from the API.
rest_preprocess_comment	Filter	Filters a comment after it is prepared for the database.
rest_pre_insert_comment	Filter	Filters a comment before it is inserted via the REST API.

wp-includes / rest-api / endpoints / class-wp-rest-post-statuses-controller.php

REST API: WP_REST_Post_Statuses_Controller class

Hook	Type	Description
rest_prepare_status	Filter	Filters a status returned from the REST API.

wp-includes / rest-api / endpoints / class-wp-rest-post-types-controller.php

REST API: WP_REST_Post_Types_Controller class

Hook	Type	Description
rest_prepare_post_type	Filter	Filters a post type returned from the API.

wp-includes / rest-api / endpoints / class-wp-rest-posts-controller.php

REST API: WP_REST_Posts_Controller class

Hook	Type	Description
rest_after_insert_{$this->post_type}	Action	Fires after a single post is completely created or updated via the REST API.
rest_delete_{$this->post_type}	Action	Fires immediately after a single post is deleted or trashed via the REST API.
rest_insert_{$this->post_type}	Action	Fires after a single post is created or updated via the REST API.
rest_prepare_{$this->post_type}	Filter	Filters the post data for a response.
rest_pre_insert_{$this->post_type}	Filter	Filters a post before it is inserted via the REST API.
rest_query_var-{$key}	Filter	Filters the query_vars used in get_items() for the constructed query.
rest_{$this->post_type}_collection_params	Filter	Filter collection parameters for the posts controller.
rest_{$this->post_type}_query	Filter	Filters the query arguments for a request.
rest_{$this->post_type}_trashable	Filter	Filters whether a post is trashable.

wp-includes / rest-api / endpoints / class-wp-rest-revisions-controller.php

REST API: WP_REST_Revisions_Controller class

Hook	Type	Description
rest_delete_revision	Action	Fires after a revision is deleted via the REST API.
rest_prepare_revision	Filter	Filters a revision returned from the API.

wp-includes / rest-api / endpoints / class-wp-rest-settings-controller.php

REST API: WP_REST_Settings_Controller class

Hook	Type	Description
rest_pre_get_setting	Filter	Filters the value of a setting recognized by the REST API.
rest_pre_update_setting	Filter	Filters whether to preempt a setting value update.

wp-includes / rest-api / endpoints / class-wp-rest-taxonomies-controller.php

REST API: WP_REST_Taxonomies_Controller class

Hook	Type	Description
rest_prepare_taxonomy	Filter	Filters a taxonomy returned from the REST API.

wp-includes / rest-api / endpoints / class-wp-rest-terms-controller.php

REST API: WP_REST_Terms_Controller class

Hook	Type	Description
rest_after_insert_{$this->taxonomy}	Action	Fires after a single term is completely created or updated via the REST API.
rest_delete_{$this->taxonomy}	Action	Fires after a single term is deleted via the REST API.
rest_insert_{$this->taxonomy}	Action	Fires after a single term is created or updated via the REST API.
rest_prepare_{$this->taxonomy}	Filter	Filters a term item returned from the API.
rest_pre_insert_{$this->taxonomy}	Filter	Filters term data before inserting term via the REST API.
rest_{$this->taxonomy}_collection_params	Filter	Filter collection parameters for the terms controller.
rest_{$this->taxonomy}_query	Filter	Filters the query arguments before passing them to get_terms().

wp-includes / rest-api / endpoints / class-wp-rest-themes-controller.php

REST API: WP_REST_Themes_Controller class

Hook	Type	Description
rest_prepare_theme	Filter	Filters theme data returned from the REST API.
rest_themes_collection_params	Filter	Filter collection parameters for the themes controller.

wp-includes / rest-api / endpoints / class-wp-rest-users-controller.php

REST API: WP_REST_Users_Controller class

Hook	Type	Description
rest_after_insert_user	Action	Fires after a user is completely created or updated via the REST API.
rest_delete_user	Action	Fires immediately after a user is deleted via the REST API.
rest_insert_user	Action	Fires immediately after a user is created or updated via the REST API.
rest_prepare_user	Filter	Filters user data returned from the REST API.
rest_pre_insert_user	Filter	Filters user data before insertion via the REST API.
rest_user_collection_params	Filter	Filter collection parameters for the users controller.
rest_user_query	Filter	Filters WP_User_Query arguments when querying users via the REST API.

wp-includes / rest-api / search / class-wp-rest-post-search-handler.php

REST API: WP_REST_Post_Search_Handler class

Hook	Type	Description
rest_post_search_query	Filter	Filters the query arguments for a search request.

wp-includes / rss.php

MagpieRSS: a simple RSS integration tool A compiled file for RSS syndication

Hook	Type	Description
load_feed_engine	Action	Fires before MagpieRSS is loaded, to optionally replace it.

wp-includes / script-loader.php

WordPress scripts and styles default loader. Several constants are used to manage the loading, concatenating and compression of scripts and CSS: define('SCRIPT_DEBUG', true); loads the development (non-minified) versions of all scripts and CSS, and disables compression and concatenation, define('CONCATENATE_SCRIPTS', false); disables compression and concatenation of scripts and CSS, define('COMPRESS_SCRIPTS', false); disables compression of scripts, define('COMPRESS_CSS', false); disables compression of CSS, define('ENFORCE_GZIP', true); forces gzip for compression (default is deflate). The globals $concatenate_scripts, $compress_scripts and $compress_css can be set by plugins to temporarily override the above settings. Also a compression test is run once and the result is saved as option 'can_compress_scripts' (0/1). The test will run again if that option is deleted.

Hook	Type	Description
enqueue_block_assets	Action	Fires after enqueuing block assets for both editor and front-end.
heartbeat_settings	Filter	Filters the Heartbeat settings.
mejs_settings	Filter	Filters the MediaElement configuration settings.
print_admin_styles	Filter	Filters whether to print the admin styles.
print_footer_scripts	Filter	Filters whether to print the footer scripts.
print_head_scripts	Filter	Filters whether to print the head scripts.
print_late_styles	Filter	Filters whether to print the styles queued too late for the HTML head.

wp-includes / shortcodes.php

WordPress API for creating bbcode-like tags or what WordPress calls "shortcodes". The tag and attribute parsing or regular expression code is based on the Textpattern tag parser. A few examples are below: [shortcode /] [shortcode foo="bar" baz="bing" /] [shortcode foo="bar"]content[/shortcode] Shortcode tags support attributes and enclosed content, but does not entirely support inline shortcodes in other shortcodes. You will have to call the shortcode parser in your function to account for that. {@internal Please be aware that the above note was made during the beta of WordPress 2.6 and in the future may not be accurate. Please update the note when it is no longer the case.}} To apply shortcode tags to content: $out = do_shortcode( $content );

Hook	Type	Description
do_shortcode_tag	Filter	Filters the output created by a shortcode callback.
pre_do_shortcode_tag	Filter	Filters whether to call a shortcode callback.

wp-includes / taxonomy.php

Core Taxonomy API

Hook	Type	Description
added_term_relationship	Action	Fires immediately after an object-term relationship is added.
add_term_relationship	Action	Fires immediately before an object-term relationship is added.
category_link	Filter	Filters the category link.
clean_object_term_cache	Action	Fires after the object term cache has been cleaned.
clean_taxonomy_cache	Action	Fires after a taxonomy’s caches have been cleaned.
clean_term_cache	Action	Fires once after each taxonomy’s term cache has been cleaned.
created_term	Action	Fires after a new term is created, and after the term cache has been cleaned.
created_{$taxonomy}	Action	Fires after a new term in a specific taxonomy is created, and after the term cache has been cleaned.
create_term	Action	Fires immediately after a new term is created, before the term cache is cleaned.
create_{$taxonomy}	Action	Fires after a new term is created for a specific taxonomy.
deleted_term_relationships	Action	Fires immediately after an object-term relationship is deleted.
deleted_term_taxonomy	Action	Fires immediately after a term taxonomy ID is deleted.
delete_term	Action	Fires after a term is deleted from the database and the cache is cleaned.
delete_term_relationships	Action	Fires immediately before an object-term relationship is deleted.
delete_term_taxonomy	Action	Fires immediately before a term taxonomy ID is deleted.
delete_{$taxonomy}	Action	Fires after a term in a specific taxonomy is deleted.
edited_term	Action	Fires after a term has been updated, and the term cache has been cleaned.
edited_terms	Action	Fires immediately after the given terms are edited.
edited_term_taxonomies	Action	Fires immediately after a term to delete’s children are reassigned a parent.
edited_term_taxonomy	Action	Fires immediately after a term-taxonomy relationship is updated.
edited_{$taxonomy}	Action	Fires after a term for a specific taxonomy has been updated, and the term cache has been cleaned.
edit_term	Action	Fires after a term has been updated, but before the term cache has been cleaned.
edit_terms	Action	Fires immediately before the given terms are edited.
edit_term_taxonomies	Action	Fires immediately before a term to delete’s children are reassigned a parent.
edit_term_taxonomy	Action	Fires immediate before a term-taxonomy relationship is updated.
edit_term_{$field}	Filter	Filters a term field to edit before it is sanitized.
edit_{$taxonomy}	Action	Fires after a term in a specific taxonomy has been updated, but before the term cache has been cleaned.
edit_{$taxonomy}_{$field}	Filter	Filters the taxonomy field to edit before it is sanitized.
get_ancestors	Filter	Filters a given object’s ancestors.
get_object_terms	Filter	Filters the terms for a given object or objects.
get_term	Filter	Filters a taxonomy term object.
get_terms	Filter	Filters the found terms.
get_{$taxonomy}	Filter	Filters a taxonomy term object.
post_format_rewrite_base	Filter	Filters the post formats rewrite base.
pre_category_nicename	Filter	Filters the category nicename before it is sanitized.
pre_delete_term	Action	Fires when deleting a term, before any modifications are made to posts or terms.
pre_insert_term	Filter	Filters a term before it is sanitized and inserted into the database.
pre_term_link	Filter	Filters the permalink structure for a terms before token replacement occurs.
pre_term_{$field}	Filter	Filters a term field value before it is sanitized.
pre_{$taxonomy}_{$field}	Filter	Filters a taxonomy field before it is sanitized.
registered_taxonomy	Action	Fires after a taxonomy is registered.
registered_taxonomy_for_object_type	Action	Fires after a taxonomy is registered for an object type.

wp-includes / template-loader.php

Loads the correct template based on the visitor's url

Hook	Type	Description
do_robots	Action	Fired when the template loader determines a robots.txt request.
embed_template	Filter	Filter the template used for embedded posts.
exit_on_http_head	Filter	Filters whether to allow ‘HEAD’ requests to generate content.

wp-includes / theme-compat / embed-content.php

Contains the post embed content template part When a post is embedded in an iframe, this file is used to create the content template part output if the active theme does not include an embed-content.php template.

Hook	Type	Description
embed_content	Action	Prints additional content after the embed excerpt.
embed_content_meta	Action	Prints additional meta content in the embed template.
embed_thumbnail_id	Filter	Filters the thumbnail image ID for use in the embed template.
embed_thumbnail_image_shape	Filter	Filters the thumbnail shape for use in the embed template.
embed_thumbnail_image_size	Filter	Filters the thumbnail image size for use in the embed template.

wp-includes / theme-compat / footer-embed.php

Contains the post embed footer template When a post is embedded in an iframe, this file is used to create the footer output if the active theme does not include a footer-embed.php template.

Hook	Type	Description
embed_footer	Action	Prints scripts or data before the closing body tag in the embed template.

wp-includes / theme-compat / header-embed.php

Contains the post embed header template When a post is embedded in an iframe, this file is used to create the header output if the active theme does not include a header-embed.php template.

Hook	Type	Description
embed_head	Action	Prints scripts or data in the embed template tag.

wp-includes / theme.php

Theme, template, and stylesheet functions.

Hook	Type	Description
after_switch_theme	Action	Fires on the first WP load after a theme switch if the old theme still exists.
current_theme_supports-{$feature}	Filter	Filters whether the current theme supports a specific feature.
editor_stylesheets	Filter	Filters the array of stylesheets applied to the editor.
get_header_image_tag	Filter	Filters the markup of header images.
get_header_video_url	Filter	Filters the header video URL.
get_theme_starter_content	Filter	Filters the expanded array of starter content.
header_video_settings	Filter	Filters header video settings.
is_header_video_active	Filter	Modify whether the custom header video is eligible to show on the current page.
locale_stylesheet_uri	Filter	Filters the localized stylesheet URI.
pre_set_theme_mod_{$name}	Filter	Filters the theme mod value on save.

wp-includes / update.php

A simple set of functions to check our version 1.0 update service.

Hook	Type	Description
core_version_check_locale	Filter	Filters the locale requested for WordPress core translations.
core_version_check_query_args	Filter	Filter the query arguments sent as part of the core version check.
plugins_update_check_locales	Filter	Filters the locales requested for plugin translations.

wp-includes / user.php

Core User API

Hook	Type	Description
after_password_reset	Action	Fires after the user’s password is reset.
allow_password_reset	Filter	Filters whether to allow a password to be reset.
check_is_user_spammed	Filter	Filters whether the user has been marked as a spammer.
clean_user_cache	Action	Fires immediately after the given user’s cache is cleaned.
determine_current_user	Filter	Filters the current user.
edit_user_{$field}	Filter	Filters a user field value in the ‘edit’ context.
email_change_email	Filter	Filters the contents of the email sent when the user’s email is changed.
get_blogs_of_user	Filter	Filters the list of sites a user belongs to.
get_usernumposts	Filter	Filters the number of posts a user has written.
get_user_option_{$option}	Filter	Filters a specific user option value.
illegal_user_logins	Filter	Filters the list of blacklisted usernames.
insert_user_meta	Filter	Filters a user’s meta values and keys immediately after the user is created or updated and before any user meta is inserted or updated.
new_user_email_content	Filter	Filters the text of the email sent when a change of user email address is attempted.
password_change_email	Filter	Filters the contents of the email sent when the user’s password is changed.
password_hint	Filter	Filters the text describing the site’s password complexity policy.
password_reset	Action	Fires before the user’s password is reset.
password_reset_expiration	Filter	Filters the expiration time of password reset keys.
password_reset_key_expired	Filter	Filters the return value of check_password_reset_key() when an old-style key is used.
pre_count_users	Filter	Filter the user count before queries are run. Return a non-null value to cause count_users() to return early.
pre_get_blogs_of_user	Filter	Filters the list of a user’s sites before it is populated.
pre_user_description	Filter	Filters a user’s description before the user is created or updated.
pre_user_display_name	Filter	Filters a user’s display name before the user is created or updated.
pre_user_email	Filter	Filters a user’s email before the user is created or updated.
pre_user_first_name	Filter	Filters a user’s first name before the user is created or updated.
pre_user_last_name	Filter	Filters a user’s last name before the user is created or updated.
pre_user_login	Filter	Filters a username after it has been sanitized.
pre_user_nicename	Filter	Filters a user’s nicename before the user is created or updated.
pre_user_nickname	Filter	Filters a user’s nickname before the user is created or updated.
pre_user_url	Filter	Filters a user’s URL before the user is created or updated.
pre_user_{$field}	Filter	Filters the value of a user field in the ‘db’ context.
profile_update	Action	Fires immediately after an existing user is updated.
register_new_user	Action	Fires after a new user registration has been recorded.
register_post	Action	Fires when submitting registration form data, before the user is created.
registration_errors	Filter	Filters the errors encountered when a new user is being registered.
retreive_password	Action	Fires before a new password is retrieved.
retrieve_password	Action	Fires before a new password is retrieved.
retrieve_password_key	Action	Fires when a password reset key is generated.

wp-includes / widgets.php

Core Widgets API This API is used for creating dynamic sidebar without hardcoding functionality into themes Includes both internal WordPress routines and theme-use routines. This functionality was found in a plugin before the WordPress 2.2 release, which included it in the core from that point on.

Hook	Type	Description
dynamic_sidebar	Action	Fires before a widget’s display callback is called.
dynamic_sidebar_after	Action	Fires after widgets are rendered in a dynamic sidebar.
dynamic_sidebar_before	Action	Fires before widgets are rendered in a dynamic sidebar.
dynamic_sidebar_has_widgets	Filter	Filters whether a sidebar has widgets.
dynamic_sidebar_params	Filter	Filters the parameters passed to a widget’s display callback.
is_active_sidebar	Filter	Filters whether a dynamic sidebar is considered “active”.
register_sidebar	Action	Fires once a sidebar has been registered.

wp-includes / wp-db.php

WordPress DB Class Original code from {@link http://php.justinvincent.com Justin Vincent ([e-mail])}

Hook	Type	Description
incompatible_sql_modes	Filter	Filters the list of incompatible SQL modes to exclude.
pre_get_col_charset	Filter	Filters the column charset value before the DB is checked.
pre_get_table_charset	Filter	Filters the table charset value before the DB is checked.
query	Filter	Filters the database query.

wp-links-opml.php

Outputs the OPML XML format for getting the links defined in the link administration. This can be used to export links from one blog over to another. Links aren't exported by the WordPress export, so this file handles that. This file is not added by default to WordPress theme pages when outputting feed links. It will have to be added manually for browsers and users to pick up that this file exists.

Hook	Type	Description
link_title	Filter	Filters the OPML outline link title text.
opml_head	Action	Fires in the OPML header.

wp-login.php

WordPress User Page Handles authentication, registering, resetting passwords, forgot password, and other user handling.

Hook	Type	Description
enable_login_autofocus	Filter	Filters whether to print the call to wp_attempt_focus() on the login screen.
login_body_class	Filter	Filters the login page body classes.
login_enqueue_scripts	Action	Enqueue scripts and styles for the login page.
login_errors	Filter	Filters the error messages displayed above the login form.
login_footer	Action	Fires in the login page footer.
login_form	Action	Fires following the ‘Password’ field in the login form.
login_form_{$action}	Action	Fires before a specified login form action.
login_head	Action	Fires in the login page header after scripts are enqueued.
login_header	Action	Fires in the login page header after the body tag is opened.
login_headertext	Filter	Filters the link text of the header logo above the login form.
login_headertitle	Action	Filter Hook (deprecated): Filters the title attribute of the header logo above login form.
login_headerurl	Filter	Filters link URL of the header logo above login form.
login_init	Action	Fires when the login form is initialized.
login_link_separator	Filter	Filters the separator used between login form navigation links.
login_message	Filter	Filters the message to display above the login form.
login_messages	Filter	Filters instructional messages displayed above the login form.
login_redirect	Filter	Filters the login redirect URL.
login_title	Filter	Filters the title tag content for login page.
logout_redirect	Filter	Filters the log out redirect URL.
lostpassword_form	Action	Fires inside the lostpassword form tags, before the hidden fields.
lostpassword_post	Action	Fires before errors are returned from a password reset request.
lostpassword_redirect	Filter	Filters the URL redirected to after submitting the lostpassword/retrievepassword form.
lost_password	Action	Fires before the lost password form.
post_password_expires	Filter	Filters the life span of the post password cookie.
register_form	Action	Fires following the ‘Email’ field in the user registration form.
registration_redirect	Filter	Filters the registration redirect URL.
resetpass_form	Action	Fires following the ‘Strength indicator’ meter in the user password reset form.
retrieve_password_message	Filter	Filters the message body of the password reset mail.
retrieve_password_title	Filter	Filters the subject of the password reset email.

wp-mail.php

Gets the email message from the user's mailbox to add as a WordPress post. Mailbox connection information must be configured under Settings > Writing

Hook	Type	Description
phone_content	Filter	Filters the content of the post submitted by email before saving.
publish_phone	Action	Fires after a post submitted by email is published.

wp-settings.php

Used to set up and fix common variables and include the WordPress procedural and class library. Allows for some configuration in wp-config.php (see default-constants.php)

Hook	Type	Description
after_setup_theme	Action	Fires after the theme is loaded.
enable_loading_advanced_cache_dropin	Filter	Filters whether to enable loading of the advanced-cache.php drop-in.
init	Action	Fires after WordPress has finished loading but before any headers are sent.
muplugins_loaded	Action	Fires once all must-use and network-activated plugins have loaded.
mu_plugin_loaded	Action	Fires once a single must-use plugin has loaded.
network_plugin_loaded	Action	Fires once a single network-activated plugin has loaded.
plugins_loaded	Action	Fires once activated plugins have loaded.
plugin_loaded	Action	Fires once a single activated plugin has loaded.

wp-signup.php

Sets up the WordPress Environment.

Hook	Type	Description
add_signup_meta	Filter	Filters the new default site meta variables.
after_signup_form	Action	Fires after the sign-up forms, before wp_footer.
before_signup_form	Action	Fires before the site sign-up form.
before_signup_header	Action	Fires before the Site Signup page is loaded.
preprocess_signup_form	Action	Fires when the site sign-up form is sent.

wp-trackback.php

Handle Trackbacks and Pingbacks Sent to WordPress

Hook	Type	Description
pre_trackback_post	Action	Fires before the trackback is added to a post.