tions_header', 10, 0 );

// Feed generator tags.
foreach ( array( 'rss2_head', 'commentsrss2_head', 'rss_head', 'rdf_header', 'atom_head', 'comments_atom_head', 'opml_head', 'app_head' ) as $action ) {
	add_action( $action, 'the_generator' );
}

// Feed Site Icon.
add_action( 'atom_head', 'atom_site_icon' );
add_action( 'rss2_head', 'rss2_site_icon' );


// WP Cron.
if ( ! defined( 'DOING_CRON' ) ) {
	add_action( 'init', 'wp_cron' );
}

// HTTPS migration.
add_action( 'update_option_home', 'wp_update_https_migration_required', 10, 2 );

// 2 Actions 2 Furious.
add_action( 'do_feed_rdf', 'do_feed_rdf', 10, 0 );
add_action( 'do_feed_rss', 'do_feed_rss', 10, 0 );
add_action( 'do_feed_rss2', 'do_feed_rss2', 10, 1 );
add_action( 'do_feed_atom', 'do_feed_atom', 10, 1 );
add_action( 'do_pings', 'do_all_pings', 10, 0 );
add_action( 'do_all_pings', 'do_all_pingbacks', 10, 0 );
add_action( 'do_all_pings', 'do_all_enclosures', 10, 0 );
add_action( 'do_all_pings', 'do_all_trackbacks', 10, 0 );
add_action( 'do_all_pings', 'generic_ping', 10, 0 );
add_action( 'do_robots', 'do_robots' );
add_action( 'do_favicon', 'do_favicon' );
add_action( 'set_comment_cookies', 'wp_set_comment_cookies', 10, 3 );
add_action( 'sanitize_comment_cookies', 'sanitize_comment_cookies' );
add_action( 'init', 'smilies_init', 5 );
add_action( 'plugins_loaded', 'wp_maybe_load_widgets', 0 );
add_action( 'plugins_loaded', 'wp_maybe_load_embeds', 0 );
add_action( 'shutdown', 'wp_ob_end_flush_all', 1 );
// Create a revision whenever a post is updated.
add_action( 'wp_after_insert_post', 'wp_save_post_revision_on_insert', 9, 3 );
add_action( 'post_updated', 'wp_save_post_revision', 10, 1 );
add_action( 'publish_post', '_publish_post_hook', 5, 1 );
add_action( 'transition_post_status', '_transition_post_status', 5, 3 );
add_action( 'transition_post_status', '_update_term_count_on_transition_post_status', 10, 3 );
add_action( 'comment_form', 'wp_comment_form_unfiltered_html_nonce' );

// Privacy.
add_action( 'user_request_action_confirmed', '_wp_privacy_account_request_confirmed' );
add_action( 'user_request_action_confirmed', '_wp_privacy_send_request_confirmation_notification', 12 ); // After request marked as completed.
add_filter( 'wp_privacy_personal_data_exporters', 'wp_register_comment_personal_data_exporter' );
add_filter( 'wp_privacy_personal_data_exporters', 'wp_register_media_personal_data_exporter' );
add_filter( 'wp_privacy_personal_data_exporters', 'wp_register_user_personal_data_exporter', 1 );
add_filter( 'wp_privacy_personal_data_erasers', 'wp_register_comment_personal_data_eraser' );
add_action( 'init', 'wp_schedule_delete_old_privacy_export_files' );
add_action( 'wp_privacy_delete_old_export_files', 'wp_privacy_delete_old_export_files' );

// Cron tasks.
add_action( 'wp_scheduled_delete', 'wp_scheduled_delete' );
add_action( 'wp_scheduled_auto_draft_delete', 'wp_delete_auto_drafts' );
add_action( 'importer_scheduled_cleanup', 'wp_delete_attachment' );
add_action( 'upgrader_scheduled_cleanup', 'wp_delete_attachment' );
add_action( 'delete_expired_transients', 'delete_expired_transients' );

// Navigation menu actions.
add_action( 'delete_post', '_wp_delete_post_menu_item' );
add_action( 'delete_term', '_wp_delete_tax_menu_item', 10, 3 );
add_action( 'transition_post_status', '_wp_auto_add_pages_to_menu', 10, 3 );
add_action( 'delete_post', '_wp_delete_customize_changeset_dependent_auto_drafts' );

// Post Thumbnail specific image filtering.
add_action( 'begin_fetch_post_thumbnail_html', '_wp_post_thumbnail_class_filter_add' );
add_action( 'end_fetch_post_thumbnail_html', '_wp_post_thumbnail_class_filter_remove' );
add_action( 'begin_fetch_post_thumbnail_html', '_wp_post_thumbnail_context_filter_add' );
add_action( 'end_fetch_post_thumbnail_html', '_wp_post_thumbnail_context_filter_remove' );

// Redirect old slugs.
add_action( 'template_redirect', 'wp_old_slug_redirect' );
add_action( 'post_updated', 'wp_check_for_changed_slugs', 12, 3 );
add_action( 'attachment_updated', 'wp_check_for_changed_slugs', 12, 3 );

// Redirect old dates.
add_action( 'post_updated', 'wp_check_for_changed_dates', 12, 3 );
add_action( 'attachment_updated', 'wp_check_for_changed_dates', 12, 3 );

// Nonce check for post previews.
add_action( 'init', '_show_post_preview' );

// Output JS to reset window.name for previews.
add_action( 'wp_head', 'wp_post_preview_js', 1 );

// Timezone.
add_filter( 'pre_option_gmt_offset', 'wp_timezone_override_offset' );

// If the upgrade hasn't run yet, assume link manager is used.
add_filter( 'default_option_link_manager_enabled', '__return_true' );

// This option no longer exists; tell plugins we always support auto-embedding.
add_filter( 'pre_option_embed_autourls', '__return_true' );

// Default settings for heartbeat.
add_filter( 'heartbeat_settings', 'wp_heartbeat_settings' );

// Check if the user is logged out.
add_action( 'admin_enqueue_scripts', 'wp_auth_check_load' );
add_filter( 'heartbeat_send', 'wp_auth_check' );
add_filter( 'heartbeat_nopriv_send', 'wp_auth_check' );

// Default authentication filters.
add_filter( 'authenticate', 'wp_authenticate_username_password', 20, 3 );
add_filter( 'authenticate', 'wp_authenticate_email_password', 20, 3 );
add_filter( 'authenticate', 'wp_authenticate_application_password', 20, 3 );
add_filter( 'authenticate', 'wp_authenticate_spam_check', 99 );
add_filter( 'determine_current_user', 'wp_validate_auth_cookie' );
add_filter( 'determine_current_user', 'wp_validate_logged_in_cookie', 20 );
add_filter( 'determine_current_user', 'wp_validate_application_password', 20 );

// Split term updates.
add_action( 'admin_init', '_wp_check_for_scheduled_split_terms' );
add_action( 'split_shared_term', '_wp_check_split_default_terms', 10, 4 );
add_action( 'split_shared_term', '_wp_check_split_terms_in_menus', 10, 4 );
add_action( 'split_shared_term', '_wp_check_split_nav_menu_terms', 10, 4 );
add_action( 'wp_split_shared_term_batch', '_wp_batch_split_terms' );

// Comment type updates.
add_action( 'admin_init', '_wp_check_for_scheduled_update_comment_type' );
add_action( 'wp_update_comment_type_batch', '_wp_batch_update_comment_type' );

// Email notifications.
add_action( 'comment_post', 'wp_new_comment_notify_moderator' );
add_action( 'comment_post', 'wp_new_comment_notify_postauthor' );
add_action( 'after_password_reset', 'wp_password_change_notification' );
add_action( 'register_new_user', 'wp_send_new_user_notifications' );
add_action( 'edit_user_created_user', 'wp_send_new_user_notifications', 10, 2 );

// REST API actions.
add_action( 'init', 'rest_api_init' );
add_action( 'rest_api_init', 'rest_api_default_filters', 10, 1 );
add_action( 'rest_api_init', 'register_initial_settings', 10 );
add_action( 'rest_api_init', 'create_initial_rest_routes', 99 );
add_action( 'parse_request', 'rest_api_loaded' );

// Sitemaps actions.
add_action( 'init', 'wp_sitemaps_get_server' );

/**
 * Filters formerly mixed into wp-includes.
 */
// Theme.
add_action( 'setup_theme', 'create_initial_theme_features', 0 );
add_action( 'after_setup_theme', '_add_default_theme_supports', 1 );
add_action( 'wp_loaded', '_custom_header_background_just_in_time' );
add_action( 'wp_head', '_custom_logo_header_styles' );
add_action( 'plugins_loaded', '_wp_customize_include' );
add_action( 'transition_post_status', '_wp_customize_publish_changeset', 10, 3 );
add_action( 'admin_enqueue_scripts', '_wp_customize_loader_settings' );
add_action( 'delete_attachment', '_delete_attachment_theme_mod' );
add_action( 'transition_post_status', '_wp_keep_alive_customize_changeset_dependent_auto_drafts', 20, 3 );

// Block Theme Previews.
add_action( 'plugins_loaded', 'wp_initialize_theme_preview_hooks', 1 );

// Calendar widget cache.
add_action( 'save_post', 'delete_get_calendar_cache' );
add_action( 'delete_post', 'delete_get_calendar_cache' );
add_action( 'update_option_start_of_week', 'delete_get_calendar_cache' );
add_action( 'update_option_gmt_offset', 'delete_get_calendar_cache' );

// Author.
add_action( 'transition_post_status', '__clear_multi_author_cache' );

// Post.
add_action( 'init', 'create_initial_post_types', 0 ); // Highest priority.
add_action( 'admin_menu', '_add_post_type_submenus' );
add_action( 'before_delete_post', '_reset_front_page_settings_for_post' );
add_action( 'wp_trash_post', '_reset_front_page_settings_for_post' );
add_action( 'change_locale', 'create_initial_post_types' );

// Post Formats.
add_filter( 'request', '_post_format_request' );
add_filter( 'term_link', '_post_format_link', 10, 3 );
add_filter( 'get_post_format', '_post_format_get_term' );
add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );

// KSES.
add_action( 'init', 'kses_init' );
add_action( 'set_current_user', 'kses_init' );

// Script Loader.
add_action( 'wp_default_scripts', 'wp_default_scripts' );
add_action( 'wp_default_scripts', 'wp_default_packages' );
add_action( 'wp_default_scripts', 'wp_default_script_modules' );

add_action( 'wp_enqueue_scripts', 'wp_localize_jquery_ui_datepicker', 1000 );
add_action( 'wp_enqueue_scripts', 'wp_common_block_scripts_and_styles' );
add_action( 'wp_enqueue_scripts', 'wp_enqueue_classic_theme_styles' );
add_action( 'admin_enqueue_scripts', 'wp_localize_jquery_ui_datepicker', 1000 );
add_action( 'admin_enqueue_scripts', 'wp_common_block_scripts_and_styles' );
add_action( 'enqueue_block_assets', 'wp_enqueue_registered_block_scripts_and_styles' );
add_action( 'enqueue_block_assets', 'enqueue_block_styles_assets', 30 );
/*
 * `wp_enqueue_registered_block_scripts_and_styles` is bound to both
 * `enqueue_block_editor_assets` and `enqueue_block_assets` hooks
 * since the introduction of the block editor in WordPress 5.0.
 *
 * The way this works is that the block assets are loaded before any other assets.
 * For example, this is the order of styles for the editor:
 *
 * - front styles registered for blocks, via `styles` handle (block.json)
 * - editor styles registered for blocks, via `editorStyles` handle (block.json)
 * - editor styles enqueued via `enqueue_block_editor_assets` hook
 * - front styles enqueued via `enqueue_block_assets` hook
 */
add_action( 'enqueue_block_editor_assets', 'wp_enqueue_registered_block_scripts_and_styles' );
add_action( 'enqueue_block_editor_assets', 'enqueue_editor_block_styles_assets' );
add_action( 'enqueue_block_editor_assets', 'wp_enqueue_editor_block_directory_assets' );
add_action( 'enqueue_block_editor_assets', 'wp_enqueue_editor_format_library_assets' );
add_action( 'enqueue_block_editor_assets', 'wp_enqueue_global_styles_css_custom_properties' );
add_action( 'wp_print_scripts', 'wp_just_in_time_script_localization' );
add_filter( 'print_scripts_array', 'wp_prototype_before_jquery' );
add_action( 'customize_controls_print_styles', 'wp_resource_hints', 1 );
add_action( 'admin_head', 'wp_check_widget_editor_deps' );
add_filter( 'block_editor_settings_all', 'wp_add_editor_classic_theme_styles' );

// Global styles can be enqueued in both the header and the footer. See https://core.trac.wordpress.org/ticket/53494.
add_action( 'wp_enqueue_scripts', 'wp_enqueue_global_styles' );
add_action( 'wp_footer', 'wp_enqueue_global_styles', 1 );

// Block supports, and other styles parsed and stored in the Style Engine.
add_action( 'wp_enqueue_scripts', 'wp_enqueue_stored_styles' );
add_action( 'wp_footer', 'wp_enqueue_stored_styles', 1 );

add_action( 'wp_default_styles', 'wp_default_styles' );
add_filter( 'style_loader_src', 'wp_style_loader_src', 10, 2 );

add_action( 'wp_head', 'wp_print_auto_sizes_contain_css_fix', 1 );
add_action( 'wp_head', 'wp_maybe_inline_styles', 1 ); // Run for styles enqueued in <head>.
add_action( 'wp_footer', 'wp_maybe_inline_styles', 1 ); // Run for late-loaded styles in the footer.

/*
 * Block specific actions and filters.
 */

// Footnotes Block.
add_action( 'init', '_wp_footnotes_kses_init' );
add_action( 'set_current_user', '_wp_footnotes_kses_init' );
add_filter( 'force_filtered_html_on_import', '_wp_footnotes_force_filtered_html_on_import_filter', 999 );

/*
 * Disable "Post Attributes" for wp_navigation post type. The attributes are
 * also conditionally enabled when a site has custom templates. Block Theme
 * templates can be available for every post type.
 */
add_filter( 'theme_wp_navigation_templates', '__return_empty_array' );

// Taxonomy.
add_action( 'init', 'create_initial_taxonomies', 0 ); // Highest priority.
add_action( 'change_locale', 'create_initial_taxonomies' );

// Canonical.
add_action( 'template_redirect', 'redirect_canonical' );
add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );

// Media.
add_action( 'wp_playlist_scripts', 'wp_playlist_scripts' );
add_action( 'customize_controls_enqueue_scripts', 'wp_plupload_default_settings' );
add_action( 'plugins_loaded', '_wp_add_additional_image_sizes', 0 );
add_filter( 'plupload_default_settings', 'wp_show_heic_upload_error' );

// Nav menu.
add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 );
add_filter( 'nav_menu_css_class', 'wp_nav_menu_remove_menu_item_has_children_class', 10, 4 );

// Widgets.
add_action( 'after_setup_theme', 'wp_setup_widgets_block_editor', 1 );
add_action( 'init', 'wp_widgets_init', 1 );
add_action( 'change_locale', array( 'WP_Widget_Media', 'reset_default_labels' ) );
add_action( 'widgets_init', '_wp_block_theme_register_classic_sidebars', 1 );

// Admin Bar.
// Don't remove. Wrong way to disable.
add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
add_action( 'admin_init', '_wp_admin_bar_init' );
add_action( 'wp_enqueue_scripts', 'wp_enqueue_admin_bar_bump_styles' );
add_action( 'wp_enqueue_scripts', 'wp_enqueue_admin_bar_header_styles' );
add_action( 'admin_enqueue_scripts', 'wp_enqueue_admin_bar_header_styles' );
add_action( 'before_signup_header', '_wp_admin_bar_init' );
add_action( 'activate_header', '_wp_admin_bar_init' );
add_action( 'wp_body_open', 'wp_admin_bar_render', 0 );
add_action( 'wp_footer', 'wp_admin_bar_render', 1000 ); // Back-compat for themes not using `wp_body_open`.
add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );

// Former admin filters that can also be hooked on the front end.
add_action( 'media_buttons', 'media_buttons' );
add_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 );
add_filter( 'media_send_to_editor', 'image_media_send_to_editor', 10, 3 );

// Embeds.
add_action( 'rest_api_init', 'wp_oembed_register_route' );
add_filter( 'rest_pre_serve_request', '_oembed_rest_pre_serve_request', 10, 4 );

add_action( 'wp_head', 'wp_oembed_add_discovery_links' );
add_action( 'wp_head', 'wp_oembed_add_host_js' ); // Back-compat for sites disabling oEmbed host JS by removing action.
add_filter( 'embed_oembed_html', 'wp_maybe_enqueue_oembed_host_js' );

add_action( 'embed_head', 'enqueue_embed_scripts', 1 );
add_action( 'embed_head', 'print_emoji_detection_script' );
add_action( 'embed_head', 'wp_enqueue_embed_styles', 9 );
add_action( 'embed_head', 'print_embed_styles' ); // Retained for backwards-compatibility. Unhooked by wp_enqueue_embed_styles().
add_action( 'embed_head', 'wp_print_head_scripts', 20 );
add_action( 'embed_head', 'wp_print_styles', 20 );
add_action( 'embed_head', 'wp_robots' );
add_action( 'embed_head', 'rel_canonical' );
add_action( 'embed_head', 'locale_stylesheet', 30 );
add_action( 'enqueue_embed_scripts', 'wp_enqueue_emoji_styles' );

add_action( 'embed_content_meta', 'print_embed_comments_button' );
add_action( 'embed_content_meta', 'print_embed_sharing_button' );

add_action( 'embed_footer', 'print_embed_sharing_dialog' );
add_action( 'embed_footer', 'print_embed_scripts' );
add_action( 'embed_footer', 'wp_print_footer_scripts', 20 );

add_filter( 'excerpt_more', 'wp_embed_excerpt_more', 20 );
add_filter( 'the_excerpt_embed', 'wptexturize' );
add_filter( 'the_excerpt_embed', 'convert_chars' );
add_filter( 'the_excerpt_embed', 'wpautop' );
add_filter( 'the_excerpt_embed', 'shortcode_unautop' );
add_filter( 'the_excerpt_embed', 'wp_embed_excerpt_attachment' );

add_filter( 'oembed_dataparse', 'wp_filter_oembed_iframe_title_attribute', 5, 3 );
add_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10, 3 );
add_filter( 'oembed_response_data', 'get_oembed_response_data_rich', 10, 4 );
add_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10, 3 );

// Capabilities.
add_filter( 'user_has_cap', 'wp_maybe_grant_install_languages_cap', 1 );
add_filter( 'user_has_cap', 'wp_maybe_grant_resume_extensions_caps', 1 );
add_filter( 'user_has_cap', 'wp_maybe_grant_site_health_caps', 1, 4 );

// Block templates post type and rendering.
add_filter( 'render_block_context', '_block_template_render_without_post_block_context' );
add_filter( 'pre_wp_unique_post_slug', 'wp_filter_wp_template_unique_post_slug', 10, 5 );
add_action( 'save_post_wp_template_part', 'wp_set_unique_slug_on_create_template_part' );
add_action( 'wp_enqueue_scripts', 'wp_enqueue_block_template_skip_link' );
add_action( 'wp_footer', 'the_block_template_skip_link' ); // Retained for backwards-compatibility. Unhooked by wp_enqueue_block_template_skip_link().
add_action( 'after_setup_theme', 'wp_enable_block_templates', 1 );
add_action( 'wp_loaded', '_add_template_loader_filters' );

// wp_navigation post type.
add_filter( 'rest_wp_navigation_item_schema', array( 'WP_Navigation_Fallback', 'update_wp_navigation_post_schema' ) );

// Fluid typography.
add_filter( 'render_block', 'wp_render_typography_support', 10, 2 );

// User preferences.
add_action( 'init', 'wp_register_persisted_preferences_meta' );

// CPT wp_block custom postmeta field.
add_action( 'init', 'wp_create_initial_post_meta' );

// Include revisioned meta when considering whether a post revision has changed.
add_filter( 'wp_save_post_revision_post_has_changed', 'wp_check_revisioned_meta_fields_have_changed', 10, 3 );

// Save revisioned post meta immediately after a revision is saved
add_action( '_wp_put_post_revision', 'wp_save_revisioned_meta_fields', 10, 2 );

// Include revisioned meta when creating or updating an autosave revision.
add_action( 'wp_creating_autosave', 'wp_autosave_post_revisioned_meta_fields' );

// When restoring revisions, also restore revisioned meta.
add_action( 'wp_restore_post_revision', 'wp_restore_post_revision_meta', 10, 2 );

// Font management.
add_action( 'wp_head', 'wp_print_font_faces', 50 );
add_action( 'deleted_post', '_wp_after_delete_font_family', 10, 2 );
add_action( 'before_delete_post', '_wp_before_delete_font_face', 10, 2 );
add_action( 'init', '_wp_register_default_font_collections' );

// Add ignoredHookedBlocks metadata attribute to the template and template part post types.
add_filter( 'rest_pre_insert_wp_template', 'inject_ignored_hooked_blocks_metadata_attributes' );
add_filter( 'rest_pre_insert_wp_template_part', 'inject_ignored_hooked_blocks_metadata_attributes' );

// Update ignoredHookedBlocks postmeta for wp_navigation post type.
add_filter( 'rest_pre_insert_wp_navigation', 'update_ignored_hooked_blocks_postmeta' );

// Inject hooked blocks into the wp_navigation post type REST response.
add_filter( 'rest_prepare_wp_navigation', 'insert_hooked_blocks_into_rest_response', 10, 2 );

unset( $filter, $action );