黄聪：wordpress中remove_action、add_action、 do_action()的hook钩子都有哪些
2014-08-03 17:23
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原文地址：http://codex.wordpress.org/Plugin_API/Action_Reference
In these actions, (hookname) depends on the page. For the Posts page it is edit.php, or for a theme's Background page it is appearance_page_custom-background.
Actions are called with the function do_action(), except those marked (ref array), which are called with the function do_action_ref_array().
admin_print_styles Runs in the HTML header so a plugin can add CSS/Stylesheets to all admin pages.admin_print_styles-(page_hook) or admin_print_style-(plugin_page) Runs when styles should be enqueued with wp_enqueue_style() for a particular admin page. Use the return value of a function such as add_submenu_page() to determine the value of (page_hook).check_passwords Runs to validate the double-entry of password when creating a new user. Action function arguments: array of login name, first password, second password.dbx_page_advanced Runs at the bottom of the "advanced" section on the page editing screen in the admin menus.dbx_page_sidebar Runs at the bottom of the sidebar on the page editing screen in the admin menus.dbx_post_advanced Runs at the bottom of the "advanced" section on the post editing screen in the admin menus.dbx_post_sidebar Runs at the bottom of the sidebar on the post editing screen in the admin menus. Use add_meta_box() in Wordpress 2.5 and higher.deactivate_(plugin file name) Runs when a plugin is deactivated.delete_option_(option_name) Runs after a WordPress option has been deleted by the delete_option() function. Action function arguments: option name. You must add an action for the specific options that you want to respond to, such as 'delete_option_foo' to respond when option "foo" has been deleted.delete_option Runs before an option gets deleted from the database.deleted_option Runs after an an option has been deleted.delete_user Runs when a user is deleted. Action function arguments: user ID.edit_category_form Runs after the add/edit category form is put on the screen (but before the end of the HTML form tag).edit_category_form_pre Runs before the edit category form is put on the screen in the admin menus.edit_tag_form Runs after the add/edit tag form is put on the screen (but before the end of the HTML form tag).edit_tag_form_pre Runs before the edit tag form is put on the screen in the admin menus.edit_form_top Runs inside the form before the title on WordPress post edit screen (and Custom Post Types), but after the inital hidden fields (user_ID, action, etc.).edit_form_after_title Runs after the title on WordPress post edit screen (and Custom Post Types) but before the built in WordPress content area.edit_form_after_editor Runs just after the WordPress post editor but before all other meta boxes. also available in Custom Post Types.edit_form_advanced Runs just before the "advanced" section of the post editing form in the admin menus.edit_page_form Runs just before the "advanced" section of the page editing form in the admin menus.edit_user_profile Runs near the end of the user profile editing screen in the admin menus.load-(page) Runs when an administration menu page is loaded. This action is not usually added directly -- see Adding Administration Menus for more details of how to add admin menus. If you do want to use it directly, the return value from add_options_page() and similar functions gives you the "(page)" part of the action name.login_form Runs just before the end of the login form.login_head Runs just before the end of the HTML head section of the login page.lost_password Runs before the "retrieve your password by email" form is printed on the login screen.lostpassword_form Runs at the end of the form used to retrieve a user's password by email, to allow a plugin to supply extra fields.lostpassword_post runs when the user has requested an email message to retrieve their password, to allow a plugin to modify the PHP $_POST variable before processing.manage_link_custom_column Runs when there is an unknown column name for the blogroll managing admin screen. Action function arguments: column name, link ID. See also filter manage_link_columns in the Plugin API/Filter Reference, which adds custom columns.manage_posts_custom_column Runs when there is an unknown column name for the managing posts admin screen. Action function arguments: column name, post ID. See also filter manage_posts_columns in the Plugin API/Filter Reference, which adds custom columns. (see Scompt's tutorial for examples and use.)manage_pages_custom_column Runs when there is an unknown column name for the managing pages admin screen. Action function arguments: column name, page ID. See also filter manage_pages_columns in the Plugin API/Filter Reference, which adds custom columns.manage_media_custom_column Runs when there is an unknown column name for the managing media admin screen. Action function arguments: column name, page ID. See also filter manage_media_columns in the Plugin API/Filter Reference, which adds custom columns.manage_{$post_type}_posts_custom_column Runs when there is an unknown column name for the managing custom post type admin screen. Action function arguments: column name, post ID. See also filter manage_${post_type}_posts_columns in the Plugin API/Filter Reference, which adds custom columns for custom post types.password_reset Runs before the user's password is reset to a random new password.personal_options_update Runs when a user updates personal options from the admin screen.plugins_loaded Runs after all plugins have been loaded.profile_personal_options Runs at the end of the Personal Options section of the user profile editing screen.profile_update Runs when a user's profile is updated. Action function argument: user ID.quick_edit_custom_box Runs when there is an unknown column name when creating the quick editor.register_form Runs just before the end of the new user registration form.register_post Runs before a new user registration request is processed.restrict_manage_posts Runs before the list of posts to edit is put on the screen in the admin menus.retrieve_password Runs when a user's password is retrieved, to send them a reminder email. Action function argument: login name.set_current_user Runs after the user has been changed by the default wp_set_current_user() function. Note thatwp_set_current_user() is also a "pluggable" function, meaning that plugins can override it; see Plugin API).show_user_profile Runs near the end of the user profile editing screen.sidebar_admin_page Runs after the main content on the widgets admin page.sidebar_admin_setup Runs early when editing the widgets displayed in sidebars.simple_edit_form Runs at the end of the "simple" post editing form in the admin menus (by default the simple form is used only for bookmarklets -- it doesn't have the "advanced" sections).update_option_(option_name) Runs after a WordPress option has been updated by the update_option() function. Action function arguments: old option value, new option value. You must add an action for the specific options that you want to respond to, such as 'update_option_foo' to respond when option "foo" has been updated.update_option Runs before an option gets updated to the database.updated_option Runs after an option has been updated.upload_files_(tab) Runs to print a screen on the upload files admin screen; "tab" is the name of the custom action tab. Define custom tabs using the wp_upload_tabs filter (see Plugin API/Filter Reference).user_new_form Runs near the end of the "Add New" user screen. Action function argument: Passes the string "add-existing-user" on multisite or "add-new-user" on single site and for network admins.user_profile_update_errors Runs just before updated user details are committed to the database.wpmu_new_user Runs when a user's profile is first created in a Multisite environment. Action function argument: user ID. If not in Multisite then use user_register.user_register Runs when a user's profile is first created. Action function argument: user ID.welcome_panel Allows you to hide the Welcome Panel in the Dashboard. This is also a smart filter, which hides the related Screen Option.wp_ajax_(action) also: wp_ajax_nopriv_(action) - Runs to do an unknown type of AJAX request handler.wp_authenticate Runs to authenticate a user when they log in. Action function arguments: array with user name and password.wp_login Runs when a user logs in.wp_logout Runs when a user logs out.
activated_plugin Runs any time any plugin is successfully activatedadd_meta_boxes Runs when "edit post" page loads. (3.0+)admin_menu Runs after the basic admin panel menu structure is in place.network_admin_notices Runs after the admin menu is printed to network admin screens.user_admin_notices Runs after the admin menu is printed to user admin screens.admin_notices Runs after the admin menu is printed to screens that aren't network- or user-admin screens.all_admin_notices Runs after the admin menu is printed to all screens.blog_privacy_selector Runs after the default blog privacy options are printed on the screen.check_admin_referer Runs in the default check_admin_referrer() function after the nonce has been checked for security purposes, to allow a plugin to force WordPress to die for extra security reasons. Note that check_admin_referrer is also a "pluggable" function, meaning that plugins can override it; see Plugin API).check_ajax_referer Runs in the default check_ajax_referer() function (which is called when an AJAX request goes to the wp-admin/admin-ajax.php script) after the user's login and password have been successfully validated from cookies, to allow a plugin to force WordPress to die for extra security reasons. Note thatcheck_ajax_referer is also a "pluggable" function, meaning that plugins can override it; see Plugin API).customize_register Runs on every request, allowing developers to register new theme options and controls for use with the Theme Customization API (as of Version 3.4).deactivated_plugin Runs any time any plugin is successfully de-activatedgenerate_rewrite_rules Runs after the rewrite rules are generated. Action function arguments: WP_Rewrite object ($wp_rewrite) by reference. Note that it is easier to use the rewrite_rules_array filter instead of this action, to modify the rewrite rules.init Runs after WordPress has finished loading but before any headers are sent. Useful for intercepting $_GET or $_POST triggers.loop_end Runs after the last post of the WordPress loop is processed.loop_start Runs before the first post of the WordPress loop is processed.network_admin_menu Runs when the basic menu structure is prepared for the Network administration page. (Administration Menus)parse_query Runs at the end of query parsing in the main query or any instance of WP_Query, such as query_posts,get_posts, or get_children. Action function arguments: WP_Query object by reference.parse_request Runs after the query request is parsed inside the main WordPress function wp. Action function argument: WPobject ($wp) by reference.pre_get_posts Runs before a query is executed in the main query or any instance of WP_Query, such as query_posts(),get_posts(), or get_children(). This hook is called after the query variable object is created, but before the query is actually run, and can be used to to alter the primary query before it is run. Also seeis_main_query(). Action function arguments: WP_Query object by reference.sanitize_comment_cookies Runs after cookies have been read from the HTTP request.send_headers Runs after the basic HTTP headers are sent inside the main WordPress function wp(). Action function argument: WP object ($wp) by reference.shutdown Runs when the page output is complete.update_(meta_type)_meta Runs when a metadata gets saved.updated_(meta_type)_meta Runs when a metadata has been updated.upgrader_process_complete Runs when the plugin downloader/upgrader class finishes runningwp_loaded This hook is fired once WP, all plugins, and the theme are fully loaded and instantiated.wp Executes after the query has been parsed and post(s) loaded, but before any template execution, inside the main WordPress function wp(). Useful if you need to have access to post data but can't use templates for output. Action function argument: WP object ($wp) by reference.
Plugin API - article on how to use filters and actions
Plugin API/Filter Reference - reference list for filter hooks
Plugin Resources - comprehensive list of plugin-related resources
WordPress Hooks Database, a database of all WordPress' hooks, showing which version they come from, and linking to the source code spots that use them
| muplugins_loaded | After must-use plugins are loaded |
| registered_taxonomy | For category, post_tag, etc. |
| registered_post_type | For post, page, etc. |
| plugins_loaded | After active plugins and pluggable functions are loaded |
| sanitize_comment_cookies | |
| setup_theme | |
| load_textdomain | For the default domain |
| after_setup_theme | Generally used to initialize theme settings/options. This is the first action hook available to themes, triggered immediately after the active theme'sfunctions.php file is loaded. add_theme_support() should be called here, since the init action hook is too late to add some features. At this stage, the current user is not yet authenticated. |
| auth_cookie_malformed | |
| auth_cookie_valid | |
| set_current_user | |
| init | Typically used by plugins to initialize. The current user is already authenticated by this time. |
| └─ widgets_init | Used to register sidebars. This is fired at 'init', with a priority of 1. |
| register_sidebar | For each sidebar and footer area |
| wp_register_sidebar_widget | For each widget |
| wp_default_scripts | (ref array) |
| wp_default_styles | (ref array) |
| admin_bar_init | |
| add_admin_bar_menus | |
| wp_loaded | After WordPress is fully loaded |
| parse_request | Allows manipulation of HTTP request handling (ref array) |
| send_headers | Allows customization of HTTP headers (ref array) |
| parse_query | After query variables are set (ref array) |
| pre_get_posts | Exposes the query-variables object before a query is executed. (ref array) |
| posts_selection | |
| wp | After WP object is set up (ref array) |
| template_redirect | |
| get_header | |
| wp_enqueue_scripts | |
| twentyeleven_enqueue_color_scheme (Specific to Twenty Eleven) | |
| wp_head | |
| wp_print_styles | |
| wp_print_scripts | |
| get_search_form | |
| loop_start | (ref array) |
| the_post | (ref array) Allows modification of the post object immediately after query |
| get_template_part_content | Template part for the content |
| loop_end | (ref array) |
| get_sidebar | |
| dynamic_sidebar | |
| get_search_form | |
| pre_get_comments | (ref array) |
| wp_meta | |
| get_footer | |
| get_sidebar | This 'sidebar' is a footer area |
| twentyeleven_credits | (Specific to Twenty Eleven) |
| wp_footer | |
| wp_print_footer_scripts | |
| admin_bar_menu | (ref array) |
| wp_before_admin_bar_render | |
| wp_after_admin_bar_render | |
| shutdown | PHP execution is about to end |
Actions Run During an Admin Page Request
These actions are run when a logged-in user opens the Posts page in Version 3.3.1. This list shows only the first time an action is called, and in many cases no function is hooked to the action. Each admin page has a different list of actions depending upon the purpose of the page and the plugins installed. This list should be viewed as a guide line or approximation, and not a concrete specification.In these actions, (hookname) depends on the page. For the Posts page it is edit.php, or for a theme's Background page it is appearance_page_custom-background.
Actions are called with the function do_action(), except those marked (ref array), which are called with the function do_action_ref_array().
Post, Page, Attachment, and Category Actions (Admin)
post_submitbox_misc_actions Runs when an editing page gets generated to add some content (eg. fields) to the submit box (where the publish button is shown). No function arguments.add_attachment Runs when an attached file is first added to the database. Action function arguments: attachment ID.add_category Same as create_category.category_add_form_fields Runs when category add form is cerated in admin. Useful to add a field in this form before the submit buttoncategory_edit_form Runs when category edit form is created in admin. Useful to add a new field to this formclean_post_cache Runs when post cache is cleaned. Action function arguments: post ID. See clean_post_cache().create_category Runs when a new category is created. Action function arguments: category ID.delete_attachment Runs just before an attached file is deleted from the database. Action function arguments: attachment ID.(Prior to version 2.8 this hook was triggered after attachment was deleted.)delete_category Runs just after a category is deleted from the database and its corresponding links/posts are updated to remove the category. Action function arguments: category ID.wp_trash_post Runs when a post or page is about to be trashed. Action function arguments: post or page ID.trashed_post Runs just after a post or page is trashed. Action function arguments: post or page ID.untrash_post Runs just before undeletion, when a post or page is restored. Action function arguments: post or page ID.untrashed_post Runs just after undeletion, when a post or page is restored. Action function arguments: post or page ID.before_delete_post Runs when a post or page is about to be deleted. Comments, attachments and metadata are still available. Action function arguments: post or page ID.delete_post Runs when a post or page is about to be deleted. Comments, attachments and metadata are already deleted. Action function arguments: post or page ID.deleted_post Runs just after a post or page is deleted. Action function arguments: post or page ID.edit_attachment Runs when an attached file is edited/updated to the database. Action function arguments: attachment ID.edit_category Runs when a category is updated/edited, including when a post or blogroll link is added/deleted or its categories are updated (which causes the count for the category to update). Action function arguments: category ID.edit_post Runs when a post or page is updated/edited, including when a comment is added or updated (which causes the comment count for the post to update). Action function arguments: post or page ID.pre_post_update Runs just before a post or page is updated. Action function arguments: post or page ID.post_updated Runs after a post or page is updated. Action function arguments: post or page ID, WP_Post object of the post before the update and after the update.transition_post_status Runs when any post status transition occurs. Action function arguments: $old_status, $new_status, $postobject. (See also Post Status Transitions.)(old status)_to_(new status) Runs when a post changes status from $old_status to $new_status. Action function arguments: $post object. (See also Post Status Transitions.)(status)_(post_type) Runs when a post of type $post_type is transitioned to $status from any other status. Action function arguments: post ID, $post object. (See also Post Status Transitions.)publish_post (not deprecated) Runs when a post is published, or if it is edited and its status is changed to "published". This action hook conforms to the (status)_(post_type) action hook type. Action function arguments: post ID, $post object. (See also Post Status Transitions.)publish_page Runs when a page is published, or if it is edited and its status is changed to "published". This action hook conforms to the (status)_(post_type) action hook type. Action function arguments: post ID, $post object. (See also Post Status Transitions.)publish_phone Runs just after a post is added via email. Action function argument: post ID.publish_future_post Runs when a future post or page is published. Action function arguments: post ID.save_post Runs whenever a post or page is created or updated, which could be from an import, post/page edit form, xmlrpc, or post by email. Action function arguments: post ID and post object. Runs after the data is saved to the database. Note that post ID may reference a post revision and not the last saved post. Usewp_is_post_revision() to get the ID of the real post.updated_postmeta Runs when a metadata has been updated.wp_insert_post Same as save_post, runs immediately afterwards.xmlrpc_publish_post Runs when a post is published via XMLRPC request, or if it is edited via XMLRPC and its status is "published". Action function arguments: post ID.Comment, Ping, and Trackback Actions
comment_closed Runs when the post is marked as not allowing comments while trying to display comment entry form. Action function argument: post ID.comment_id_not_found Runs when the post ID is not found while trying to display comments or comment entry form. Action function argument: post ID.comment_flood_trigger Runs when a comment flood is detected, just before wp_die is called to stop the comment from being accepted. Action function arguments: time of previous comment, time of current comment.comment_(old status)_to_(new status) Runs when a comment status transition occurs. Action function arguments: Comment object.comment_on_draft Runs when the post is a draft while trying to display a comment entry form or comments. Action function argument: post ID.comment_post Runs just after a comment is saved in the database. Action function arguments: comment ID, approval status ("spam", or 0/1 for disapproved/approved).edit_comment Runs after a comment is updated/edited in the database. Action function arguments: comment ID.delete_comment Runs just before a comment is deleted. Action function arguments: comment ID.deleted_comment Runs just after a comment is deleted. Action function arguments: comment ID.trash_comment Runs just before a comment is trashed. Action function arguments: comment ID.trashed_comment Runs just after a comment is trashed. Action function arguments: comment ID.comment_closed Runs when the post is marked as not a spam.pingback_post Runs when a ping is added to a post. Action function argument: comment ID.pre_ping Runs before a ping is fully processed. Action function arguments: array of the post links to be processed, and the "pung" setting for the post.trackback_post Runs when a trackback is added to a post. Action function argument: comment ID.wp_blacklist_check Runs to check whether a comment should be blacklisted. Action function arguments: author name, author email, author URL, comment text, author IP address, author's user agent (browser). Your function can execute awp_die to reject the comment, or perhaps modify one of the input arguments so that it will contain one of the blacklist keywords set in the WordPress options.wp_insert_comment Runs whenever a comment is created.wp_set_comment_status Runs when the status of a comment changes. Action function arguments: comment ID, status string indicating the new status ("delete", "approve", "spam", "hold").Blogroll Actions
add_link Runs when a new blogroll link is first added to the database. Action function arguments: link ID.delete_link Runs when a blogroll link is deleted. Action function arguments: link ID.edit_link Runs when a blogroll link is edited. Action function arguments: link ID.Feed Actions
atom_entry Runs just after the entry information has been printed (but before closing the entry tag) for each blog entry in an atom feed.atom_head Runs just after the blog information has been printed in an atom feed, just before the first entry.atom_ns Runs inside the root XML element for an atom feed (to add namespaces).commentrss2_item Runs just after a single comment's information has been printed in a comment feed (but before closing the item tag). Action function arguments: comment ID, post ID.do_feed_(feed) Runs when a feed is generated, where feed is the type of feed (rss2, atom, rdf, etc.). Use priority less than 10 to run before printing the feed. Action function argument: true (the feed is for comments) or false(it is for posts).rdf_header Runs just after the blog information has been printed in an RDF feed, just before the first entry.rdf_item Runs just after the entry information has been printed (but before closing the item tag) for each blog entry in an RDF feed.rdf_ns Runs inside the root XML element in an RDF feed (to add namespaces).rss_head Runs just after the blog information has been printed in an RSS feed, just before the first entry.rss_item Runs just after the entry information has been printed (but before closing the item tag) for each blog entry in an RSS feed.rss2_head Runs just after the blog information has been printed in an RSS 2 feed, just before the first entry.rss2_item Runs just after the entry information has been printed (but before closing the item tag) for each blog entry in an RSS 2 feed.rss2_ns Runs inside the root XML element in an RSS 2 feed (to add namespaces).Template Actions
after_setup_theme Runs during a themes initialization. Is generally used to perform basic setup, registration, and init actions for a theme.comment_form Runs at the bottom of a comment form rendered by comment_form(), right before the closing </form>. Action function argument: the post ID.do_robots Runs when the template file chooser determines that it is a robots.txt request.do_robotstxt Runs in the do_robots() function before it prints out the Disallow lists for the robots.txt file.get_footer Runs when the template calls the get_footer() function, just before the footer.php template file is loaded.get_header Runs when the template calls the get_header() function, just before the header.php template file is loaded.switch_theme Runs when the blog's theme is changed. Action function argument: name of the new theme. If used in a theme, it only works if the theme that adds action is the one being disabled.after_switch_theme Runs when the blog's theme is changed. Action function argument: name of the new theme. If used in a theme, it only works if the theme that adds action is the one being enabled. Can be used to run certain code when enabling a theme.load-themes.php Runs when the theme is activate or deactivate (replace by an other).template_redirect Runs before the determination of the template file to be used to display the requested page.wp_footer Runs when the template calls the wp_footer() function, generally near the bottom of the blog page.wp_head Runs when the template calls the wp_head() function. This hook is generally placed near the top of a page template between <head> and </head>. This hook does not take any parameters.wp_meta Runs when the sidebar.php template file calls the wp_meta() function, to allow the plugin to insert content into the sidebar.wp_print_scripts Runs just before WordPress prints registered JavaScript scripts into the page header.Administrative Actions
activate_(plugin file name) Runs when the plugin is first activated. See Function_Reference/register_activation_hook.activity_box_end Runs at the end of the activity box on the admin Dashboard screen.add_category_form_pre Runs before the add category form is put on the screen in the admin menus.add_option_(option_name) Runs after a WordPress option has been added by the add_option() function. Action function arguments: option name, option value. You must add an action for the specific options that you want to respond to, such as 'add_option_foo' to respond when option "foo" has been added.add_option Runs before an option gets added to the database.added_option Runs after an an option has been added.admin_head Runs in the HTML <head> section of the admin panel.admin_head-(page_hook) or admin_head-(plugin_page) Runs in the HTML <head> section of a specific admin page or the admin panel of a plugin-generated page.admin_init Runs at the beginning of every admin page before the page is rendered. See wp-admin/admin.php, wp-admin/admin-post.php, and wp-admin/admin-ajax.php.admin_footer-(plugin_page) Runs at the end of the <body> section of the admin panel of a plugin-generated page.admin_post_(action) also: admin_post_nopriv_(action) - Runs a handler for an unspecified GET or POST request.admin_footer Runs at the end of the admin panel inside the body tagadmin_enqueue_scripts Runs in the HTML header so a plugin or theme can enqueue JavaScript and CSS to all admin pages.admin_print_scripts Runs in the HTML header so a plugin can add JavaScript scripts to all admin pages.admin_print_scripts-(page_hook) or admin_print_scripts-(plugin_page) Runs to print JavaScript scripts in the HTML head section of a specific plugin-generated admin page. The (page_hook) is returned when using any of the functions that add plugin menu items to the admin menu: add_management_page(), add_options_page(), etc. Example:function myplugin_menu() {
if ( function_exists('add_management_page') ) {
$page = add_management_page( 'myplugin', 'myplugin', 'manage_options', 'myplugin_slug', 'myplugin_admin_page' );
add_action( "admin_print_scripts-$page", 'myplugin_admin_head' );
}
}admin_print_styles Runs in the HTML header so a plugin can add CSS/Stylesheets to all admin pages.admin_print_styles-(page_hook) or admin_print_style-(plugin_page) Runs when styles should be enqueued with wp_enqueue_style() for a particular admin page. Use the return value of a function such as add_submenu_page() to determine the value of (page_hook).check_passwords Runs to validate the double-entry of password when creating a new user. Action function arguments: array of login name, first password, second password.dbx_page_advanced Runs at the bottom of the "advanced" section on the page editing screen in the admin menus.dbx_page_sidebar Runs at the bottom of the sidebar on the page editing screen in the admin menus.dbx_post_advanced Runs at the bottom of the "advanced" section on the post editing screen in the admin menus.dbx_post_sidebar Runs at the bottom of the sidebar on the post editing screen in the admin menus. Use add_meta_box() in Wordpress 2.5 and higher.deactivate_(plugin file name) Runs when a plugin is deactivated.delete_option_(option_name) Runs after a WordPress option has been deleted by the delete_option() function. Action function arguments: option name. You must add an action for the specific options that you want to respond to, such as 'delete_option_foo' to respond when option "foo" has been deleted.delete_option Runs before an option gets deleted from the database.deleted_option Runs after an an option has been deleted.delete_user Runs when a user is deleted. Action function arguments: user ID.edit_category_form Runs after the add/edit category form is put on the screen (but before the end of the HTML form tag).edit_category_form_pre Runs before the edit category form is put on the screen in the admin menus.edit_tag_form Runs after the add/edit tag form is put on the screen (but before the end of the HTML form tag).edit_tag_form_pre Runs before the edit tag form is put on the screen in the admin menus.edit_form_top Runs inside the form before the title on WordPress post edit screen (and Custom Post Types), but after the inital hidden fields (user_ID, action, etc.).edit_form_after_title Runs after the title on WordPress post edit screen (and Custom Post Types) but before the built in WordPress content area.edit_form_after_editor Runs just after the WordPress post editor but before all other meta boxes. also available in Custom Post Types.edit_form_advanced Runs just before the "advanced" section of the post editing form in the admin menus.edit_page_form Runs just before the "advanced" section of the page editing form in the admin menus.edit_user_profile Runs near the end of the user profile editing screen in the admin menus.load-(page) Runs when an administration menu page is loaded. This action is not usually added directly -- see Adding Administration Menus for more details of how to add admin menus. If you do want to use it directly, the return value from add_options_page() and similar functions gives you the "(page)" part of the action name.login_form Runs just before the end of the login form.login_head Runs just before the end of the HTML head section of the login page.lost_password Runs before the "retrieve your password by email" form is printed on the login screen.lostpassword_form Runs at the end of the form used to retrieve a user's password by email, to allow a plugin to supply extra fields.lostpassword_post runs when the user has requested an email message to retrieve their password, to allow a plugin to modify the PHP $_POST variable before processing.manage_link_custom_column Runs when there is an unknown column name for the blogroll managing admin screen. Action function arguments: column name, link ID. See also filter manage_link_columns in the Plugin API/Filter Reference, which adds custom columns.manage_posts_custom_column Runs when there is an unknown column name for the managing posts admin screen. Action function arguments: column name, post ID. See also filter manage_posts_columns in the Plugin API/Filter Reference, which adds custom columns. (see Scompt's tutorial for examples and use.)manage_pages_custom_column Runs when there is an unknown column name for the managing pages admin screen. Action function arguments: column name, page ID. See also filter manage_pages_columns in the Plugin API/Filter Reference, which adds custom columns.manage_media_custom_column Runs when there is an unknown column name for the managing media admin screen. Action function arguments: column name, page ID. See also filter manage_media_columns in the Plugin API/Filter Reference, which adds custom columns.manage_{$post_type}_posts_custom_column Runs when there is an unknown column name for the managing custom post type admin screen. Action function arguments: column name, post ID. See also filter manage_${post_type}_posts_columns in the Plugin API/Filter Reference, which adds custom columns for custom post types.password_reset Runs before the user's password is reset to a random new password.personal_options_update Runs when a user updates personal options from the admin screen.plugins_loaded Runs after all plugins have been loaded.profile_personal_options Runs at the end of the Personal Options section of the user profile editing screen.profile_update Runs when a user's profile is updated. Action function argument: user ID.quick_edit_custom_box Runs when there is an unknown column name when creating the quick editor.register_form Runs just before the end of the new user registration form.register_post Runs before a new user registration request is processed.restrict_manage_posts Runs before the list of posts to edit is put on the screen in the admin menus.retrieve_password Runs when a user's password is retrieved, to send them a reminder email. Action function argument: login name.set_current_user Runs after the user has been changed by the default wp_set_current_user() function. Note thatwp_set_current_user() is also a "pluggable" function, meaning that plugins can override it; see Plugin API).show_user_profile Runs near the end of the user profile editing screen.sidebar_admin_page Runs after the main content on the widgets admin page.sidebar_admin_setup Runs early when editing the widgets displayed in sidebars.simple_edit_form Runs at the end of the "simple" post editing form in the admin menus (by default the simple form is used only for bookmarklets -- it doesn't have the "advanced" sections).update_option_(option_name) Runs after a WordPress option has been updated by the update_option() function. Action function arguments: old option value, new option value. You must add an action for the specific options that you want to respond to, such as 'update_option_foo' to respond when option "foo" has been updated.update_option Runs before an option gets updated to the database.updated_option Runs after an option has been updated.upload_files_(tab) Runs to print a screen on the upload files admin screen; "tab" is the name of the custom action tab. Define custom tabs using the wp_upload_tabs filter (see Plugin API/Filter Reference).user_new_form Runs near the end of the "Add New" user screen. Action function argument: Passes the string "add-existing-user" on multisite or "add-new-user" on single site and for network admins.user_profile_update_errors Runs just before updated user details are committed to the database.wpmu_new_user Runs when a user's profile is first created in a Multisite environment. Action function argument: user ID. If not in Multisite then use user_register.user_register Runs when a user's profile is first created. Action function argument: user ID.welcome_panel Allows you to hide the Welcome Panel in the Dashboard. This is also a smart filter, which hides the related Screen Option.wp_ajax_(action) also: wp_ajax_nopriv_(action) - Runs to do an unknown type of AJAX request handler.wp_authenticate Runs to authenticate a user when they log in. Action function arguments: array with user name and password.wp_login Runs when a user logs in.wp_logout Runs when a user logs out.
Dashboard "Right Now" Widget Actions
right_now_content_table_end Adds table rows at the bottom the content column of the Right Now Dashboard widget.right_now_table_end Called after displaying the number of Spam comments in the Discussion column of the Right Now Dashboard widget.right_now_discussion_table_end Called after displaying the number of Spam comments and after the right_now_table_end action in the Discussion column of the Right Now Dashboard widget.right_now_end Called after the current version information is displayed on the Right Now Dashboardwidget. (Note: In v3.4, this is actually rightnow_end. See ticket #21046.)activity_box_end Last action called on the Right Now Dashboard widget.Advanced Actions
This section contains actions related to the queries WordPress uses to figure out what posts to display, the WordPress loop, activating plugins, and other fundamental-level WordPress code.activated_plugin Runs any time any plugin is successfully activatedadd_meta_boxes Runs when "edit post" page loads. (3.0+)admin_menu Runs after the basic admin panel menu structure is in place.network_admin_notices Runs after the admin menu is printed to network admin screens.user_admin_notices Runs after the admin menu is printed to user admin screens.admin_notices Runs after the admin menu is printed to screens that aren't network- or user-admin screens.all_admin_notices Runs after the admin menu is printed to all screens.blog_privacy_selector Runs after the default blog privacy options are printed on the screen.check_admin_referer Runs in the default check_admin_referrer() function after the nonce has been checked for security purposes, to allow a plugin to force WordPress to die for extra security reasons. Note that check_admin_referrer is also a "pluggable" function, meaning that plugins can override it; see Plugin API).check_ajax_referer Runs in the default check_ajax_referer() function (which is called when an AJAX request goes to the wp-admin/admin-ajax.php script) after the user's login and password have been successfully validated from cookies, to allow a plugin to force WordPress to die for extra security reasons. Note thatcheck_ajax_referer is also a "pluggable" function, meaning that plugins can override it; see Plugin API).customize_register Runs on every request, allowing developers to register new theme options and controls for use with the Theme Customization API (as of Version 3.4).deactivated_plugin Runs any time any plugin is successfully de-activatedgenerate_rewrite_rules Runs after the rewrite rules are generated. Action function arguments: WP_Rewrite object ($wp_rewrite) by reference. Note that it is easier to use the rewrite_rules_array filter instead of this action, to modify the rewrite rules.init Runs after WordPress has finished loading but before any headers are sent. Useful for intercepting $_GET or $_POST triggers.loop_end Runs after the last post of the WordPress loop is processed.loop_start Runs before the first post of the WordPress loop is processed.network_admin_menu Runs when the basic menu structure is prepared for the Network administration page. (Administration Menus)parse_query Runs at the end of query parsing in the main query or any instance of WP_Query, such as query_posts,get_posts, or get_children. Action function arguments: WP_Query object by reference.parse_request Runs after the query request is parsed inside the main WordPress function wp. Action function argument: WPobject ($wp) by reference.pre_get_posts Runs before a query is executed in the main query or any instance of WP_Query, such as query_posts(),get_posts(), or get_children(). This hook is called after the query variable object is created, but before the query is actually run, and can be used to to alter the primary query before it is run. Also seeis_main_query(). Action function arguments: WP_Query object by reference.sanitize_comment_cookies Runs after cookies have been read from the HTTP request.send_headers Runs after the basic HTTP headers are sent inside the main WordPress function wp(). Action function argument: WP object ($wp) by reference.shutdown Runs when the page output is complete.update_(meta_type)_meta Runs when a metadata gets saved.updated_(meta_type)_meta Runs when a metadata has been updated.upgrader_process_complete Runs when the plugin downloader/upgrader class finishes runningwp_loaded This hook is fired once WP, all plugins, and the theme are fully loaded and instantiated.wp Executes after the query has been parsed and post(s) loaded, but before any template execution, inside the main WordPress function wp(). Useful if you need to have access to post data but can't use templates for output. Action function argument: WP object ($wp) by reference.
Further Reading
Writing a Plugin - description of how to write a pluginPlugin API - article on how to use filters and actions
Plugin API/Filter Reference - reference list for filter hooks
Plugin Resources - comprehensive list of plugin-related resources
WordPress Hooks Database, a database of all WordPress' hooks, showing which version they come from, and linking to the source code spots that use them
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