do_action( string $tag,  $arg = '' )

Execute functions hooked on a specific action hook.

Description

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

You can pass extra arguments to the hooks, much like you can with apply_filters().

Parameters

$tag

(Required) The name of the action to be executed.

$arg,...

(Optional) Additional arguments which are passed on to the functions hooked to the action. Default empty.

Source

File: wp-includes/plugin.php 

function do_action($tag, $arg = '') {
	global $wp_filter, $wp_actions, $wp_current_filter;

	if ( ! isset($wp_actions[$tag]) )
		$wp_actions[$tag] = 1;
	else
		++$wp_actions[$tag];

	$all_args = func_get_args();

	// Do 'all' actions first
	if ( isset($wp_filter['all']) ) {
		$wp_current_filter[] = $tag;
		_wp_call_all_hook( $all_args );
	}

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

	if ( !isset($wp_filter['all']) )
		$wp_current_filter[] = $tag;

	$args = $all_args;
	array_shift( $args );

	if ( empty( $args ) ) {
		$args = array( '' );
	}

	$wp_filter[ $tag ]->do_action( $args );

	array_pop($wp_current_filter);
}

Expand Source Code View on GitHub

Related

Uses

Uses
Uses Description
wp-includes/plugin.php: _wp_call_all_hook()

Call the ‘all’ hook, which will process the functions hooked into it.

Used By

Used By
Used By Description
wp-includes/general-template.php: wp_body_open()

Fire the wp_body_open action.
wp-signup.php: confirm_user_signup()

New user signup confirmation
wp-signup.php: signup_blog()

Setup the new site signup
wp-signup.php: confirm_blog_signup()

New site signup confirmation
wp-signup.php: confirm_another_blog_signup()

Confirm a new site signup.
wp-signup.php: signup_user()

Setup the new user signup process
wp-signup.php: do_signup_header()

Prints signup_header via wp_head
wp-signup.php: show_blog_form()

Generates and displays the Signup and Create Site forms
wp-signup.php: show_user_form()

Display user registration form
wp-signup.php: signup_another_blog()

Allow returning users to sign up for another site
wp-login.php: retrieve_password()

Handles sending password retrieval email to user.
wp-login.php: login_header()

Output the login page header.
wp-login.php: login_footer()

Outputs the footer for the login page.
wp-includes/deprecated.php: delete_usermeta()

Remove user meta data.
wp-includes/deprecated.php: update_usermeta()

Update metadata of user.
wp-includes/customize/class-wp-customize-selective-refresh.php: WP_Customize_Selective_Refresh::handle_render_partials_request()

Handles the Ajax request to return the rendered partials for the requested placements.
wp-includes/general-template.php: wp_enqueue_code_editor()

Enqueue assets needed by the code editor for the given settings.
wp-includes/general-template.php: wp_head()

Fire the wp_head action.
wp-includes/general-template.php: wp_footer()

Fire the wp_footer action.
wp-includes/general-template.php: wp_meta()

Theme container function for the ‘wp_meta’ action.
wp-includes/script-loader.php: wp_print_footer_scripts()

Hooks to print the scripts and styles in the footer.
wp-includes/script-loader.php: wp_enqueue_scripts()

Wrapper for do_action(‘wp_enqueue_scripts’)
wp-includes/general-template.php: get_header()

Load header template.
wp-includes/general-template.php: get_footer()

Load footer template.
wp-includes/general-template.php: get_sidebar()

Load sidebar template.
wp-includes/general-template.php: get_template_part()

Loads a template part into a template.
wp-includes/general-template.php: get_search_form()

Display search form.
wp-includes/script-loader.php: wp_print_head_scripts()

Prints the script queue in the HTML head on the front end.
wp-includes/class-wp-user-query.php: WP_User_Query::prepare_query()

Prepare the query variables.
wp-includes/script-loader.php: print_head_scripts()

Prints the script queue in the HTML head on admin pages.
wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php: WP_REST_Comments_Controller::create_item()

Creates a comment.
wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php: WP_REST_Comments_Controller::update_item()

Updates a comment.
wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php: WP_REST_Comments_Controller::delete_item()

Deletes a comment.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: WP_REST_Users_Controller::create_item()

Creates a single user.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: WP_REST_Users_Controller::update_item()

Updates a single user.
wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php: WP_REST_Users_Controller::delete_item()

Deletes a single user.
wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php: WP_REST_Terms_Controller::create_item()

Creates a single term in a taxonomy.
wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php: WP_REST_Terms_Controller::update_item()

Updates a single term from a taxonomy.
wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php: WP_REST_Terms_Controller::delete_item()

Deletes a single term from a taxonomy.
wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php: WP_REST_Attachments_Controller::create_item()

Creates a single attachment.
wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php: WP_REST_Attachments_Controller::update_item()

Updates a single attachment.
wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php: WP_REST_Revisions_Controller::delete_item()

Deletes a single revision.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::update_item()

Updates a single post.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::delete_item()

Deletes a single post.
wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php: WP_REST_Posts_Controller::create_item()

Creates a single post.
wp-includes/functions.wp-styles.php: wp_print_styles()

Display styles that are in the $handles queue.
wp-includes/class-wp-user.php: WP_User::add_role()

Add role to user.
wp-includes/class-wp-user.php: WP_User::remove_role()

Remove role from user.
wp-includes/class-wp-user.php: WP_User::set_role()

Set the role of the user.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::wp_ajax_update_widget()

Updates widget settings asynchronously.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::customize_controls_init()

Ensures all widgets get loaded into the Customizer.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::print_styles()

Calls admin_print_styles-widgets.php and admin_print_styles hooks to allow custom styles from plugins.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::print_scripts()

Calls admin_print_scripts-widgets.php and admin_print_scripts hooks to allow custom scripts from plugins.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::enqueue_scripts()

Enqueues scripts and styles for Customizer panel and export data to JavaScript.
wp-includes/class-wp-customize-widgets.php: WP_Customize_Widgets::print_footer_scripts()

Calls admin_print_footer_scripts and admin_print_scripts hooks to allow custom scripts from plugins.
wp-includes/media.php: wp_enqueue_media()

Enqueues all scripts, styles, settings, and templates necessary to use all media JS APIs.
wp-includes/media.php: wp_playlist_shortcode()

Builds the Playlist shortcode output.
wp-includes/l10n.php: load_textdomain()

Load a .mo file into the text domain $domain.
wp-includes/l10n.php: unload_textdomain()

Unload translations for a text domain.
wp-includes/class-wp-query.php: WP_Query::have_posts()

Determines whether there are more posts available in the loop.
wp-includes/class-wp-query.php: WP_Query::the_comment()

Sets up the current comment.
wp-includes/class-wp-query.php: WP_Query::parse_tax_query()

Parses various taxonomy related query vars.
wp-includes/class-wp-query.php: WP_Query::get_posts()

Retrieve the posts based on query variables.
wp-includes/class-wp-metadata-lazyloader.php: WP_Metadata_Lazyloader::queue_objects()

Adds objects to the metadata lazy-load queue.
wp-includes/pluggable.php: wp_new_user_notification()

Email login credentials to a newly-registered user.
wp-includes/pluggable.php: wp_verify_nonce()

Verify that correct nonce was used with time limit.
wp-includes/pluggable.php: wp_set_auth_cookie()

Log in a user by setting authentication cookies.
wp-includes/pluggable.php: wp_clear_auth_cookie()

Removes all of the cookies associated with authentication.
wp-includes/pluggable.php: auth_redirect()

Checks if a user is logged in, if not it redirects them to the login page.
wp-includes/pluggable.php: check_admin_referer()

Makes sure that a user was referred from another admin page.
wp-includes/pluggable.php: check_ajax_referer()

Verifies the Ajax request to prevent processing requests external of the blog.
wp-includes/pluggable.php: wp_set_current_user()

Changes the current user by ID or name.
wp-includes/pluggable.php: wp_mail()

Send mail, similar to PHP’s mail
wp-includes/pluggable.php: wp_authenticate()

Authenticate a user, confirming the login credentials are valid.
wp-includes/pluggable.php: wp_logout()

Log the current user out.
wp-includes/pluggable.php: wp_validate_auth_cookie()

Validates authentication cookie.
wp-includes/media-template.php: wp_print_media_templates()

Prints the templates used in the media manager.
wp-includes/nav-menu.php: wp_delete_nav_menu()

Delete a Navigation Menu.
wp-includes/nav-menu.php: wp_update_nav_menu_object()

Save the properties of a menu or create a new menu with those properties.
wp-includes/nav-menu.php: wp_update_nav_menu_item()

Save the properties of a menu item or create a new one.
wp-includes/comment.php: wp_handle_comment_submission()

Handles the submission of a comment, usually posted to wp-comments-post.php via a comment form.
wp-includes/comment.php: clean_comment_cache()

Removes a comment from the object cache.
wp-includes/comment.php: wp_set_comment_status()

Sets the status of a comment.
wp-includes/comment.php: wp_update_comment()

Updates an existing comment in the database.
wp-includes/comment.php: wp_update_comment_count_now()

Updates the comment count for the post.
wp-includes/comment.php: wp_transition_comment_status()

Call hooks for when a comment status transition occurs.
wp-includes/comment.php: wp_insert_comment()

Inserts a comment into the database.
wp-includes/comment.php: wp_new_comment()

Adds a new comment to the database.
wp-includes/comment.php: wp_delete_comment()

Trashes or deletes a comment.
wp-includes/comment.php: wp_trash_comment()

Moves a comment to the Trash
wp-includes/comment.php: wp_untrash_comment()

Removes a comment from the Trash
wp-includes/comment.php: wp_spam_comment()

Marks a comment as Spam
wp-includes/comment.php: wp_unspam_comment()

Removes a comment from the Spam
wp-includes/comment.php: wp_blacklist_check()

Does comment contain blacklisted characters or words.
wp-includes/comment.php: wp_allow_comment()

Validates whether this comment is allowed to be made.
wp-includes/comment.php: wp_check_comment_flood()

Checks whether comment flooding is occurring.
wp-includes/class-wp-customize-control.php: WP_Customize_Control::maybe_render()

Check capabilities and render the control.
wp-includes/class-wp-customize-section.php: WP_Customize_Section::maybe_render()

Check capabilities and render the section.
wp-includes/admin-bar.php: wp_admin_bar_render()

Renders the admin bar to the page based on the $wp_admin_bar->menu member var.
wp-includes/embed.php: enqueue_embed_scripts()

Enqueue embed iframe default CSS and JS & fire do_action(‘enqueue_embed_scripts’)
wp-includes/class-wp-admin-bar.php: WP_Admin_Bar::initialize()
wp-includes/class-wp-admin-bar.php: WP_Admin_Bar::add_menus()
wp-includes/ms-load.php: ms_load_current_site_and_network()

Identifies the network and site of a requested domain and path and populates the corresponding network and site global objects as part of the multisite bootstrap process.
wp-includes/capabilities.php: grant_super_admin()

Grants Super Admin privileges.
wp-includes/capabilities.php: revoke_super_admin()

Revokes Super Admin privileges.
wp-includes/functions.wp-scripts.php: wp_print_scripts()

Prints scripts in document head that are in the $handles queue.
wp-includes/ms-blogs.php: update_blog_status()

Update a blog details field.
wp-includes/ms-blogs.php: clean_network_cache()

Removes a network from the object cache.
wp-includes/ms-blogs.php: switch_to_blog()

Switch the current blog.
wp-includes/ms-blogs.php: restore_current_blog()

Restore the current blog, after calling switch_to_blog()
wp-includes/class-http.php: WP_Http::request()

Send an HTTP request to a URI.
wp-includes/class-http.php: WP_Http::_dispatch_request()

Dispatches a HTTP request to a supporting transport.
wp-includes/ms-blogs.php: wpmu_update_blogs_date()

Update the last_updated field for the current site.
wp-includes/ms-blogs.php: update_blog_details()

Update the details for a blog. Updates the blogs table for a given blog id.
wp-includes/ms-blogs.php: clean_blog_cache()

Clean the blog cache
wp-includes/meta.php: update_metadata_by_mid()

Update meta data by meta ID
wp-includes/meta.php: delete_metadata_by_mid()

Delete meta data by meta ID
wp-includes/meta.php: add_metadata()

Add metadata for the specified object.
wp-includes/meta.php: update_metadata()

Update metadata for the specified object. If no value already exists for the specified object ID and metadata key, the metadata will be added.
wp-includes/meta.php: delete_metadata()

Delete metadata for the specified object.
wp-includes/user.php: get_password_reset_key()

Creates, stores, then returns a password reset key for user.
wp-includes/user.php: reset_password()

Handles resetting the user’s password.
wp-includes/user.php: register_new_user()

Handles registering a new user.
wp-includes/user.php: clean_user_cache()

Clean all user caches
wp-includes/user.php: wp_insert_user()

Insert a user into the database.
wp-includes/user.php: wp_signon()

Authenticates and logs a user in with ‘remember’ capability.
wp-includes/theme.php: check_theme_switched()

Checks if a theme has been changed and runs ‘after_switch_theme’ hook on the next WP load.
wp-includes/theme.php: _wp_customize_publish_changeset()

Publishes a snapshot’s changes.
wp-includes/theme.php: switch_theme()

Switches the theme.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newPage()

Create new page.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deletePage()

Delete page.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editPage()

Edit page.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPageList()

Retrieve page list.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getAuthors()

Retrieve authors list.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTags()

Get list of all tags
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newCategory()

Create new category.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deleteCategory()

Remove category.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_suggestCategories()

Retrieve category list.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getComment()

Retrieve comment.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getComments()

Retrieve comments.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deleteComment()

Delete a comment.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editComment()

Edit comment.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newComment()

Create new comment.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getCommentStatusList()

Retrieve all of the comment status.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getCommentCount()

Retrieve comment count.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPostStatusList()

Retrieve post statuses.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPageStatusList()

Retrieve page statuses.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getMediaItem()

Retrieve a media item by ID
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getMediaLibrary()

Retrieves a collection of media library items (or attachments)
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPostFormats()

Retrieves a list of post formats used by the site.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPostType()

Retrieves a post type
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPostTypes()

Retrieves a post types
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getRevisions()

Retrieve revisions for a specific post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_restoreRevision()

Restore a post revision
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_getUsersBlogs()

Retrieve blogs that user owns.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_getUserInfo()

Retrieve user’s data.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_getPost()

Retrieve post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_getRecentPosts()

Retrieve list of recent posts.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_newPost()

Creates new post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_editPost()

Edit a post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::blogger_deletePost()

Remove a post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_newPost()

Create a new post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_editPost()

Edit a post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_getPost()

Retrieve post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_getRecentPosts()

Retrieve list of recent posts.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_getCategories()

Retrieve the list of categories on a given blog.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mw_newMediaObject()

Uploads a file, following your settings.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_getRecentPostTitles()

Retrieve the post titles of recent posts.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_getCategoryList()

Retrieve list of all categories on blog.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_getPostCategories()

Retrieve post categories.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_setPostCategories()

Sets categories for a post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_supportedMethods()

Retrieve an array of methods supported by this server.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_supportedTextFilters()

Retrieve an empty array because we don’t support per-post text filters.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_getTrackbackPings()

Retrieve trackbacks sent to a given post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::mt_publishPost()

Sets a post’s publish status to ‘publish’.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::pingback_ping()

Retrieves a pingback and registers it.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::pingback_extensions_getPingbacks()

Retrieve array of URLs that pingbacked the given URL.
wp-includes/post-thumbnail-template.php: get_the_post_thumbnail()

Retrieve the post thumbnail.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getUsersBlogs()

Retrieve the blogs of the user.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newPost()

Create a new post for any registered post type.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editPost()

Edit a post for any registered post type.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deletePost()

Delete a post for any registered post type.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPost()

Retrieve a post.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPosts()

Retrieve posts.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_newTerm()

Create a new term.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editTerm()

Edit a term.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_deleteTerm()

Delete a term.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTerm()

Retrieve a term.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTerms()

Retrieve all terms for a taxonomy.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTaxonomy()

Retrieve a taxonomy.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getTaxonomies()

Retrieve all taxonomies.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getUser()

Retrieve a user.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getUsers()

Retrieve users.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getProfile()

Retrieve information about the requesting user.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_editProfile()

Edit user’s profile.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPage()

Retrieve page.
wp-includes/class-wp-xmlrpc-server.php: wp_xmlrpc_server::wp_getPages()

Retrieve Pages.
wp-includes/option.php: add_network_option()

Add a new network option.
wp-includes/option.php: delete_network_option()

Removes a network option by name.
wp-includes/option.php: update_network_option()

Update the value of a network option that was already added.
wp-includes/option.php: delete_site_transient()

Delete a site transient.
wp-includes/option.php: set_site_transient()

Set/update the value of a site transient.
wp-includes/option.php: set_transient()

Set/update the value of a transient.
wp-includes/option.php: update_option()

Update the value of an option that was already added.
wp-includes/option.php: add_option()

Add a new option.
wp-includes/option.php: delete_option()

Removes option by name. Prevents removal of protected ClassicPress options.
wp-includes/option.php: delete_transient()

Delete a transient.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::_publish_changeset_values()

Publish changeset values.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::start_previewing_theme()

If the theme to be previewed isn’t the active theme, add filter callbacks to swap it out at runtime.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::stop_previewing_theme()

Stop previewing the selected theme.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::wp_loaded()

Register styles/scripts and initialize the preview of each setting
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::set_post_value()

Override a setting’s value in the current customized state.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::customize_preview_init()

Print JavaScript settings.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::save_changeset_post()

Save the post for the loaded changeset.
wp-includes/class-wp-customize-manager.php: WP_Customize_Manager::trash_changeset_post()

Trash or delete a changeset post.
wp-includes/class-wp-rewrite.php: WP_Rewrite::set_permalink_structure()

Sets the main permalink structure for the site.
wp-includes/rest-api.php: rest_get_server()

Retrieves the current REST server instance.
wp-includes/class-wp-term-query.php: WP_Term_Query::parse_query()

Parse arguments passed to the term query with default query parameters.
wp-includes/class-wp-term-query.php: WP_Term_Query::get_terms()

Get terms, based on query_vars.
wp-includes/class-wp-locale-switcher.php: WP_Locale_Switcher::switch_to_locale()

Switches the translations according to the given locale.
wp-includes/class-wp-locale-switcher.php: WP_Locale_Switcher::restore_previous_locale()

Restores the translations according to the previous locale.
wp-includes/class-wp-locale-switcher.php: WP_Locale_Switcher::change_locale()

Changes the site’s locale to the given one.
wp-includes/post.php: _publish_post_hook()

Hook to schedule pings and enclosures when a post is published.
wp-includes/post.php: clean_post_cache()

Will clean the post in the cache.
wp-includes/post.php: clean_attachment_cache()

Will clean the attachment in the cache.
wp-includes/post.php: _transition_post_status()

Hook for managing future post transitions to published.
wp-includes/post.php: wp_delete_attachment()

Trash or delete an attachment.
wp-includes/post.php: wp_publish_post()

Publish a post by transitioning the post status.
wp-includes/post.php: wp_transition_post_status()

Fires actions related to the transitioning of a post’s status.
wp-includes/post.php: wp_trash_post()

Move a post or page to the Trash
wp-includes/post.php: wp_untrash_post()

Restore a post or page from the Trash.
wp-includes/post.php: wp_trash_post_comments()

Moves comments for a post to the trash.
wp-includes/post.php: wp_untrash_post_comments()

Restore comments for a post from the trash.
wp-includes/post.php: wp_insert_post()

Insert or update a post.
wp-includes/post.php: stick_post()

Make a post sticky.
wp-includes/post.php: unstick_post()

Un-stick a post.
wp-includes/post.php: wp_delete_post()

Trash or delete a post or page.
wp-includes/post.php: register_post_type()

Registers a post type.
wp-includes/post.php: unregister_post_type()

Unregisters a post type.
wp-includes/class-wp-customize-panel.php: WP_Customize_Panel::maybe_render()

Check capabilities and render the panel.
wp-includes/ms-functions.php: add_existing_user_to_blog()

Add a user to a blog based on details from maybe_add_existing_user_to_blog().
wp-includes/ms-functions.php: wpmu_activate_signup()

Activate a signup.
wp-includes/ms-functions.php: wpmu_create_user()

Create a user.
wp-includes/ms-functions.php: wpmu_create_blog()

Create a site.
wp-includes/ms-functions.php: wpmu_signup_blog()

Record site signup information for future activation.
wp-includes/ms-functions.php: wpmu_signup_user()

Record user signup information for future activation.
wp-includes/class-wp-roles.php: WP_Roles::init_roles()

Initializes all of the available roles.
wp-includes/ms-functions.php: add_user_to_blog()

Adds a user to a blog.
wp-includes/ms-functions.php: remove_user_from_blog()

Remove a user from a blog.
wp-includes/class-wp-editor.php: _WP_Editors::editor()

Outputs the HTML for a single instance of the editor.
wp-includes/class-wp-editor.php: _WP_Editors::enqueue_scripts()
wp-includes/class-wp-editor.php: _WP_Editors::print_default_editor_scripts()

Print (output) all editor scripts and default settings.
wp-includes/class-wp-editor.php: _WP_Editors::editor_js()

Print (output) the TinyMCE configuration and initialization scripts.
wp-includes/load.php: shutdown_action_hook()

Runs just before PHP shuts down execution.
wp-includes/update.php: wp_version_check()

Check WordPress version against the newest version.
wp-includes/taxonomy.php: _update_post_term_count()

Will update term count based on object types of the current taxonomy.
wp-includes/taxonomy.php: _update_generic_term_count()

Will update term count based on number of objects.
wp-includes/taxonomy.php: wp_update_term()

Update term based on arguments provided.
wp-includes/taxonomy.php: clean_object_term_cache()

Removes the taxonomy relationship to terms from the cache.
wp-includes/taxonomy.php: clean_term_cache()

Will remove all of the term ids from the cache.
wp-includes/taxonomy.php: clean_taxonomy_cache()

Clean the caches for a taxonomy.
wp-includes/taxonomy.php: wp_set_object_terms()

Create Term and Taxonomy Relationships.
wp-includes/taxonomy.php: wp_remove_object_terms()

Remove term(s) associated with a given object.
wp-includes/taxonomy.php: wp_delete_term()

Removes a term from the database.
wp-includes/taxonomy.php: wp_insert_term()

Add a new term to the database.
wp-includes/taxonomy.php: register_taxonomy()

Creates or modifies a taxonomy object.
wp-includes/taxonomy.php: unregister_taxonomy()

Unregisters a taxonomy.
wp-includes/revision.php: _wp_put_post_revision()

Inserts post data into the posts table as a post revision.
wp-includes/revision.php: wp_restore_post_revision()

Restores a post to the specified revision.
wp-includes/revision.php: wp_delete_post_revision()

Deletes a revision.
wp-includes/comment-template.php: comment_form()

Outputs a complete commenting form for use within a template.
wp-includes/widgets.php: wp_widgets_init()

Registers all of the default ClassicPress widgets on startup.
wp-includes/widgets.php: the_widget()

Output an arbitrary widget as a template tag.
wp-includes/widgets.php: dynamic_sidebar()

Display dynamic sidebar.
wp-includes/widgets.php: wp_unregister_sidebar_widget()

Remove widget from sidebar.
wp-includes/class-wp-customize-setting.php: WP_Customize_Setting::preview()

Add filters to supply the setting’s value when accessed.
wp-includes/class-wp-customize-setting.php: WP_Customize_Setting::save()

Checks user capabilities and theme supports, and then saves the value of the setting.
wp-includes/class-wp-customize-setting.php: WP_Customize_Setting::update()

Save the value of the setting, using the related API.
wp-includes/widgets.php: register_sidebar()

Builds the definition for a single sidebar and returns the ID.
wp-includes/widgets.php: wp_register_sidebar_widget()

Register an instance of a widget.
wp-includes/functions.php: _deprecated_constructor()

Marks a constructor as deprecated and informs when it has been used.
wp-includes/functions.php: _deprecated_file()

Mark a file as deprecated and inform when it has been used.
wp-includes/functions.php: _deprecated_argument()

Mark a function argument as deprecated and inform when it has been used.
wp-includes/functions.php: _deprecated_hook()

Marks a deprecated action or filter hook as deprecated and throws a notice.
wp-includes/functions.php: _doing_it_wrong()

Mark something as being incorrectly called.
wp-includes/functions.php: _deprecated_function()

Mark a function as deprecated and inform when it has been used.
wp-includes/functions.php: do_feed()

Load the feed template from the use of an action hook.
wp-includes/functions.php: do_robots()

Display the robots.txt file content.
wp-admin/custom-background.php: Custom_Background::handle_upload()

Handle an Image upload for the background image.
wp-admin/custom-header.php: Custom_Image_Header::step_1()

Display first step of custom header image page.
wp-admin/custom-header.php: Custom_Image_Header::step_2()

Display second step of custom header image page.
wp-admin/includes/class-wp-screen.php: WP_Screen::set_current_screen()

Makes the screen object the current screen.
wp-admin/includes/class-wp-media-list-table.php: WP_Media_List_Table::column_default()

Handles output for the default column.
wp-admin/includes/class-wp-media-list-table.php: WP_Media_List_Table::extra_tablenav()
wp-admin/includes/class-wp-plugins-list-table.php: WP_Plugins_List_Table::single_row()
wp-admin/includes/media.php: edit_form_image_editor()

Displays the image and editor in the post editor
wp-admin/includes/media.php: media_upload_form()

Outputs the legacy media upload form.
wp-admin/includes/class-wp-ms-themes-list-table.php: WP_MS_Themes_List_Table::column_default()

Handles default column output.
wp-admin/includes/class-wp-ms-themes-list-table.php: WP_MS_Themes_List_Table::single_row()
wp-admin/includes/media.php: wp_iframe()

Adds the iframe to display content for the media upload page
wp-admin/includes/class-wp-comments-list-table.php: WP_Comments_List_Table::extra_tablenav()
wp-admin/includes/class-wp-comments-list-table.php: WP_Comments_List_Table::column_default()
wp-admin/includes/template.php: iframe_header()

Generic Iframe header for use with Thickbox
wp-admin/includes/template.php: iframe_footer()

Generic Iframe footer for use with Thickbox
wp-admin/includes/template.php: _wp_admin_html_begin()
wp-admin/includes/template.php: get_inline_data()

Adds hidden fields with the data for use in the inline editor for posts and pages.
wp-admin/includes/schema.php: populate_options()

Create ClassicPress options and set the default values.
wp-admin/includes/nav-menu.php: wp_nav_menu_update_menu_items()

Saves nav menu items
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::extra_tablenav()
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::column_default()

Handles the default column output.
wp-admin/includes/class-wp-posts-list-table.php: WP_Posts_List_Table::inline_edit()

Outputs the hidden row displayed when inline editing
wp-admin/includes/class-theme-upgrader.php: Theme_Upgrader::bulk_upgrade()

Upgrade several themes at once.
wp-admin/includes/class-wp-links-list-table.php: WP_Links_List_Table::column_default()

Handles the default column output.
wp-admin/includes/class-core-upgrader.php: Core_Upgrader::upgrade()

Upgrade ClassicPress core.
wp-admin/includes/bookmark.php: wp_delete_link()

Deletes a specified link from the database.
wp-admin/includes/bookmark.php: wp_insert_link()

Inserts/updates links into/in the database.
wp-admin/includes/ajax-actions.php: wp_ajax_crop_image()

Ajax handler for cropping an image.
wp-admin/includes/ajax-actions.php: wp_ajax_heartbeat()

Ajax handler for the Heartbeat API.
wp-admin/includes/ajax-actions.php: wp_ajax_save_widget()

Ajax handler for saving a widget.
wp-admin/includes/ajax-actions.php: wp_ajax_delete_inactive_widgets()

Ajax handler for removing inactive widgets.
wp-admin/includes/ajax-actions.php: wp_ajax_nopriv_heartbeat()

Ajax handler for the Heartbeat API in the no-privilege context.
wp-admin/includes/class-wp-plugin-install-list-table.php: WP_Plugin_Install_List_Table::display_tablenav()
wp-admin/includes/upgrade.php: wp_install()

Installs the site.
wp-admin/includes/upgrade.php: wp_upgrade()

Runs ClassicPress Upgrade functions.
wp-admin/includes/meta-boxes.php: page_attributes_meta_box()

Display page attributes form fields.
wp-admin/includes/meta-boxes.php: link_submit_meta_box()

Display link create form fields.
wp-admin/includes/class-wp-upgrader.php: WP_Upgrader::run()

Run an upgrade/installation.
wp-admin/includes/meta-boxes.php: post_submit_meta_box()

Displays post submit form fields.
wp-admin/includes/meta-boxes.php: attachment_submit_meta_box()

Display attachment submit form fields.
wp-admin/includes/meta-boxes.php: post_comment_status_meta_box()

Display comments status form fields.
wp-admin/includes/update-core.php: update_core()

Upgrades the core of ClassicPress.
wp-admin/includes/class-wp-automatic-updater.php: WP_Automatic_Updater::update()

Update an item, if appropriate.
wp-admin/includes/class-wp-automatic-updater.php: WP_Automatic_Updater::run()

Kicks off the background update process, looping through all pending updates.
wp-admin/includes/user.php: wp_privacy_process_personal_data_erasure_page()

Mark erasure requests as completed after processing is finished.
wp-admin/includes/user.php: edit_user()

Edit user settings based on contents of $_POST
wp-admin/includes/user.php: wp_delete_user()

Remove user and optionally reassign posts and links to another user.
wp-admin/includes/plugin.php: activate_plugin()

Attempts activation of plugin in a “sandbox” and redirects on success.
wp-admin/includes/plugin.php: deactivate_plugins()

Deactivate a single plugin or multiple plugins.
wp-admin/includes/plugin.php: delete_plugins()

Remove directory and files of a plugin for a list of plugins.
wp-admin/includes/plugin.php: uninstall_plugin()

Uninstall a single plugin.
wp-admin/includes/export.php: export_wp()

Generates the WXR export file for download.
wp-admin/includes/file.php: wp_privacy_generate_personal_data_export_file()

Generate the personal data export file.
wp-admin/includes/file.php: wp_privacy_process_personal_data_export_page()

Intercept personal data exporter page ajax responses in order to assemble the personal data export file.
wp-admin/includes/class-wp-ms-sites-list-table.php: WP_MS_Sites_List_Table::column_plugins()

Handles the plugins column output.
wp-admin/includes/class-wp-ms-sites-list-table.php: WP_MS_Sites_List_Table::column_default()

Handles output for the default column.
wp-admin/includes/class-language-pack-upgrader.php: Language_Pack_Upgrader::bulk_upgrade()

Bulk upgrade language packs.
wp-admin/includes/post.php: _admin_notice_post_locked()

Outputs the HTML for the notice to say that someone else is editing or has taken over editing of this post.
wp-admin/includes/post.php: wp_create_post_autosave()

Creates autosave data for the specified post from $_POST data.
wp-admin/includes/update.php: wp_plugin_update_row()

Displays update information for a plugin.
wp-admin/includes/update.php: wp_theme_update_row()

Displays update information for a theme.
wp-admin/includes/class-wp-theme-install-list-table.php: WP_Theme_Install_List_Table::display()
wp-admin/includes/dashboard.php: wp_dashboard_setup()

Registers dashboard widgets.
wp-admin/includes/dashboard.php: wp_dashboard_right_now()

Dashboard widget that displays some basic stats about the site.
wp-admin/includes/dashboard.php: wp_network_dashboard_right_now()
wp-admin/includes/class-plugin-upgrader.php: Plugin_Upgrader::bulk_upgrade()

Bulk upgrade several plugins at once.
wp-admin/includes/ms.php: confirm_delete_users()
wp-admin/includes/ms.php: wpmu_delete_blog()

Delete a site.
wp-admin/includes/ms.php: wpmu_delete_user()

Delete a user from the network and remove from all sites.
wp-admin/includes/ms.php: update_user_status()

Update the status of a user in the database.
wp-admin/includes/class-wp-terms-list-table.php: WP_Terms_List_Table::inline_edit()

Outputs the hidden row displayed when inline editing
wp-admin/includes/class-wp-users-list-table.php: WP_Users_List_Table::extra_tablenav()

Output the controls to allow user roles to be changed in bulk.
wp-admin/install.php: display_setup_form()

Display installer setup form.
wp-activate.php: do_activate_header()

Adds an action hook specific to this page.
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Changelog
Version Description
WP-1.2.0 Introduced.