wp-includes/default-filters.php

   1 <?php
   2 /**
   3  * Sets up the default filters and actions for most
   4  * of the WordPress hooks.
   5  *
   6  * If you need to remove a default hook, this file will
   7  * give you the priority for which to use to remove the
   8  * hook.
   9  *
  10  * Not all of the default hooks are found in default-filters.php
  11  *
  12  * @package WordPress
  13  */
  14
  15 // Strip, trim, kses, special chars for string saves
  16 foreach ( array( 'pre_term_name', 'pre_comment_author_name', 'pre_link_name', 'pre_link_target', 'pre_link_rel', 'pre_user_display_name', 'pre_user_first_name', 'pre_user_last_name', 'pre_user_nickname' ) as $filter ) {
  17         add_filter( $filter, 'sanitize_text_field'  );
  18         add_filter( $filter, 'wp_filter_kses'       );
  19         add_filter( $filter, '_wp_specialchars', 30 );
  20 }
  21
  22 // Strip, kses, special chars for string display
  23 foreach ( array( 'term_name', 'comment_author_name', 'link_name', 'link_target', 'link_rel', 'user_display_name', 'user_first_name', 'user_last_name', 'user_nickname' ) as $filter ) {
  24         if ( is_admin() ) {
  25                 // These are expensive. Run only on admin pages for defense in depth.
  26                 add_filter( $filter, 'sanitize_text_field'  );
  27                 add_filter( $filter, 'wp_kses_data'       );
  28         }
  29         add_filter( $filter, '_wp_specialchars', 30 );
  30 }
  31
  32 // Kses only for textarea saves
  33 foreach ( array( 'pre_term_description', 'pre_link_description', 'pre_link_notes', 'pre_user_description' ) as $filter ) {
  34         add_filter( $filter, 'wp_filter_kses' );
  35 }
  36
  37 // Kses only for textarea admin displays
  38 if ( is_admin() ) {
  39         foreach ( array( 'term_description', 'link_description', 'link_notes', 'user_description' ) as $filter ) {
  40                 add_filter( $filter, 'wp_kses_data' );
  41         }
  42         add_filter( 'comment_text', 'wp_kses_post' );
  43 }
  44
  45 // Email saves
  46 foreach ( array( 'pre_comment_author_email', 'pre_user_email' ) as $filter ) {
  47         add_filter( $filter, 'trim'           );
  48         add_filter( $filter, 'sanitize_email' );
  49         add_filter( $filter, 'wp_filter_kses' );
  50 }
  51
  52 // Email admin display
  53 foreach ( array( 'comment_author_email', 'user_email' ) as $filter ) {
  54         add_filter( $filter, 'sanitize_email' );
  55         if ( is_admin() )
  56                 add_filter( $filter, 'wp_kses_data' );
  57 }
  58
  59 // Save URL
  60 foreach ( array( 'pre_comment_author_url', 'pre_user_url', 'pre_link_url', 'pre_link_image',
  61         'pre_link_rss', 'pre_post_guid' ) as $filter ) {
  62         add_filter( $filter, 'wp_strip_all_tags' );
  63         add_filter( $filter, 'esc_url_raw'       );
  64         add_filter( $filter, 'wp_filter_kses'    );
  65 }
  66
  67 // Display URL
  68 foreach ( array( 'user_url', 'link_url', 'link_image', 'link_rss', 'comment_url', 'post_guid' ) as $filter ) {
  69         if ( is_admin() )
  70                 add_filter( $filter, 'wp_strip_all_tags' );
  71         add_filter( $filter, 'esc_url'           );
  72         if ( is_admin() )
  73                 add_filter( $filter, 'wp_kses_data'    );
  74 }
  75
  76 // Slugs
  77 add_filter( 'pre_term_slug', 'sanitize_title' );
  78
  79 // Keys
  80 foreach ( array( 'pre_post_type', 'pre_post_status', 'pre_post_comment_status', 'pre_post_ping_status' ) as $filter ) {
  81         add_filter( $filter, 'sanitize_key' );
  82 }
  83
  84 // Mime types
  85 add_filter( 'pre_post_mime_type', 'sanitize_mime_type' );
  86 add_filter( 'post_mime_type', 'sanitize_mime_type' );
  87
  88 // Meta
  89 add_filter( 'register_meta_args', '_wp_register_meta_args_whitelist', 10, 2 );
  90
  91 // Places to balance tags on input
  92 foreach ( array( 'content_save_pre', 'excerpt_save_pre', 'comment_save_pre', 'pre_comment_content' ) as $filter ) {
  93         add_filter( $filter, 'convert_invalid_entities' );
  94         add_filter( $filter, 'balanceTags', 50 );
  95 }
  96
  97 // Format strings for display.
  98 foreach ( array( 'comment_author', 'term_name', 'link_name', 'link_description', 'link_notes', 'bloginfo', 'wp_title', 'widget_title' ) as $filter ) {
  99         add_filter( $filter, 'wptexturize'   );
 100         add_filter( $filter, 'convert_chars' );
 101         add_filter( $filter, 'esc_html'      );
 102 }
 103
 104 // Format WordPress
 105 foreach ( array( 'the_content', 'the_title', 'wp_title' ) as $filter )
 106         add_filter( $filter, 'capital_P_dangit', 11 );
 107 add_filter( 'comment_text', 'capital_P_dangit', 31 );
 108
 109 // Format titles
 110 foreach ( array( 'single_post_title', 'single_cat_title', 'single_tag_title', 'single_month_title', 'nav_menu_attr_title', 'nav_menu_description' ) as $filter ) {
 111         add_filter( $filter, 'wptexturize' );
 112         add_filter( $filter, 'strip_tags'  );
 113 }
 114
 115 // Format text area for display.
 116 foreach ( array( 'term_description' ) as $filter ) {
 117         add_filter( $filter, 'wptexturize'      );
 118         add_filter( $filter, 'convert_chars'    );
 119         add_filter( $filter, 'wpautop'          );
 120         add_filter( $filter, 'shortcode_unautop');
 121 }
 122
 123 // Format for RSS
 124 add_filter( 'term_name_rss', 'convert_chars' );
 125
 126 // Pre save hierarchy
 127 add_filter( 'wp_insert_post_parent', 'wp_check_post_hierarchy_for_loops', 10, 2 );
 128 add_filter( 'wp_update_term_parent', 'wp_check_term_hierarchy_for_loops', 10, 3 );
 129
 130 // Display filters
 131 add_filter( 'the_title', 'wptexturize'   );
 132 add_filter( 'the_title', 'convert_chars' );
 133 add_filter( 'the_title', 'trim'          );
 134
 135 add_filter( 'the_content', 'wptexturize'                       );
 136 add_filter( 'the_content', 'convert_smilies',               20 );
 137 add_filter( 'the_content', 'wpautop'                           );
 138 add_filter( 'the_content', 'shortcode_unautop'                 );
 139 add_filter( 'the_content', 'prepend_attachment'                );
 140 add_filter( 'the_content', 'wp_make_content_images_responsive' );
 141
 142 add_filter( 'the_excerpt',     'wptexturize'      );
 143 add_filter( 'the_excerpt',     'convert_smilies'  );
 144 add_filter( 'the_excerpt',     'convert_chars'    );
 145 add_filter( 'the_excerpt',     'wpautop'          );
 146 add_filter( 'the_excerpt',     'shortcode_unautop');
 147 add_filter( 'get_the_excerpt', 'wp_trim_excerpt'  );
 148
 149 add_filter( 'the_post_thumbnail_caption', 'wptexturize'     );
 150 add_filter( 'the_post_thumbnail_caption', 'convert_smilies' );
 151 add_filter( 'the_post_thumbnail_caption', 'convert_chars'   );
 152
 153 add_filter( 'comment_text', 'wptexturize'            );
 154 add_filter( 'comment_text', 'convert_chars'          );
 155 add_filter( 'comment_text', 'make_clickable',      9 );
 156 add_filter( 'comment_text', 'force_balance_tags', 25 );
 157 add_filter( 'comment_text', 'convert_smilies',    20 );
 158 add_filter( 'comment_text', 'wpautop',            30 );
 159
 160 add_filter( 'comment_excerpt', 'convert_chars' );
 161
 162 add_filter( 'list_cats',         'wptexturize' );
 163
 164 add_filter( 'wp_sprintf', 'wp_sprintf_l', 10, 2 );
 165
 166 add_filter( 'widget_text', 'balanceTags' );
 167
 168 add_filter( 'date_i18n', 'wp_maybe_decline_date' );
 169
 170 // RSS filters
 171 add_filter( 'the_title_rss',      'strip_tags'                    );
 172 add_filter( 'the_title_rss',      'ent2ncr',                    8 );
 173 add_filter( 'the_title_rss',      'esc_html'                      );
 174 add_filter( 'the_content_rss',    'ent2ncr',                    8 );
 175 add_filter( 'the_content_feed',   'wp_staticize_emoji'            );
 176 add_filter( 'the_content_feed',   '_oembed_filter_feed_content'   );
 177 add_filter( 'the_excerpt_rss',    'convert_chars'                 );
 178 add_filter( 'the_excerpt_rss',    'ent2ncr',                    8 );
 179 add_filter( 'comment_author_rss', 'ent2ncr',                    8 );
 180 add_filter( 'comment_text_rss',   'ent2ncr',                    8 );
 181 add_filter( 'comment_text_rss',   'esc_html'                      );
 182 add_filter( 'comment_text_rss',   'wp_staticize_emoji'            );
 183 add_filter( 'bloginfo_rss',       'ent2ncr',                    8 );
 184 add_filter( 'the_author',         'ent2ncr',                    8 );
 185 add_filter( 'the_guid',           'esc_url'                       );
 186
 187 // Email filters
 188 add_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
 189
 190 // Misc filters
 191 add_filter( 'option_ping_sites',        'privacy_ping_filter'                 );
 192 add_filter( 'option_blog_charset',      '_wp_specialchars'                    ); // IMPORTANT: This must not be wp_specialchars() or esc_html() or it'll cause an infinite loop
 193 add_filter( 'option_blog_charset',      '_canonical_charset'                  );
 194 add_filter( 'option_home',              '_config_wp_home'                     );
 195 add_filter( 'option_siteurl',           '_config_wp_siteurl'                  );
 196 add_filter( 'tiny_mce_before_init',     '_mce_set_direction'                  );
 197 add_filter( 'teeny_mce_before_init',    '_mce_set_direction'                  );
 198 add_filter( 'pre_kses',                 'wp_pre_kses_less_than'               );
 199 add_filter( 'sanitize_title',           'sanitize_title_with_dashes',   10, 3 );
 200 add_action( 'check_comment_flood',      'check_comment_flood_db',       10, 3 );
 201 add_filter( 'comment_flood_filter',     'wp_throttle_comment_flood',    10, 3 );
 202 add_filter( 'pre_comment_content',      'wp_rel_nofollow',              15    );
 203 add_filter( 'comment_email',            'antispambot'                         );
 204 add_filter( 'option_tag_base',          '_wp_filter_taxonomy_base'            );
 205 add_filter( 'option_category_base',     '_wp_filter_taxonomy_base'            );
 206 add_filter( 'the_posts',                '_close_comments_for_old_posts', 10, 2);
 207 add_filter( 'comments_open',            '_close_comments_for_old_post', 10, 2 );
 208 add_filter( 'pings_open',               '_close_comments_for_old_post', 10, 2 );
 209 add_filter( 'editable_slug',            'urldecode'                           );
 210 add_filter( 'editable_slug',            'esc_textarea'                        );
 211 add_filter( 'nav_menu_meta_box_object', '_wp_nav_menu_meta_box_object'        );
 212 add_filter( 'pingback_ping_source_uri', 'pingback_ping_source_uri'            );
 213 add_filter( 'xmlrpc_pingback_error',    'xmlrpc_pingback_error'               );
 214 add_filter( 'title_save_pre',           'trim'                                );
 215
 216 add_filter( 'http_request_host_is_external',    'allowed_http_request_hosts', 10, 2 );
 217
 218 // REST API filters.
 219 add_action( 'xmlrpc_rsd_apis',            'rest_output_rsd' );
 220 add_action( 'wp_head',                    'rest_output_link_wp_head', 10, 0 );
 221 add_action( 'template_redirect',          'rest_output_link_header', 11, 0 );
 222 add_action( 'auth_cookie_malformed',      'rest_cookie_collect_status' );
 223 add_action( 'auth_cookie_expired',        'rest_cookie_collect_status' );
 224 add_action( 'auth_cookie_bad_username',   'rest_cookie_collect_status' );
 225 add_action( 'auth_cookie_bad_hash',       'rest_cookie_collect_status' );
 226 add_action( 'auth_cookie_valid',          'rest_cookie_collect_status' );
 227 add_filter( 'rest_authentication_errors', 'rest_cookie_check_errors', 100 );
 228
 229 // Actions
 230 add_action( 'wp_head',             '_wp_render_title_tag',            1     );
 231 add_action( 'wp_head',             'wp_enqueue_scripts',              1     );
 232 add_action( 'wp_head',             'wp_resource_hints',               2     );
 233 add_action( 'wp_head',             'feed_links',                      2     );
 234 add_action( 'wp_head',             'feed_links_extra',                3     );
 235 add_action( 'wp_head',             'rsd_link'                               );
 236 add_action( 'wp_head',             'wlwmanifest_link'                       );
 237 add_action( 'wp_head',             'adjacent_posts_rel_link_wp_head', 10, 0 );
 238 add_action( 'wp_head',             'locale_stylesheet'                      );
 239 add_action( 'publish_future_post', 'check_and_publish_future_post',   10, 1 );
 240 add_action( 'wp_head',             'noindex',                          1    );
 241 add_action( 'wp_head',             'print_emoji_detection_script',     7    );
 242 add_action( 'wp_head',             'wp_print_styles',                  8    );
 243 add_action( 'wp_head',             'wp_print_head_scripts',            9    );
 244 add_action( 'wp_head',             'wp_generator'                           );
 245 add_action( 'wp_head',             'rel_canonical'                          );
 246 add_action( 'wp_head',             'wp_shortlink_wp_head',            10, 0 );
 247 add_action( 'wp_head',             'wp_site_icon',                    99    );
 248 add_action( 'wp_footer',           'wp_print_footer_scripts',         20    );
 249 add_action( 'template_redirect',   'wp_shortlink_header',             11, 0 );
 250 add_action( 'wp_print_footer_scripts', '_wp_footer_scripts'                 );
 251 add_action( 'init',                'check_theme_switched',            99    );
 252 add_action( 'after_switch_theme',  '_wp_sidebars_changed'                   );
 253 add_action( 'wp_print_styles',     'print_emoji_styles'                     );
 254
 255 if ( isset( $_GET['replytocom'] ) )
 256     add_action( 'wp_head', 'wp_no_robots' );
 257
 258 // Login actions
 259 add_filter( 'login_head',          'wp_resource_hints',             8     );
 260 add_action( 'login_head',          'wp_print_head_scripts',         9     );
 261 add_action( 'login_head',          'print_admin_styles',            9     );
 262 add_action( 'login_head',          'wp_site_icon',                  99    );
 263 add_action( 'login_footer',        'wp_print_footer_scripts',       20    );
 264 add_action( 'login_init',          'send_frame_options_header',     10, 0 );
 265
 266 // Feed Generator Tags
 267 foreach ( array( 'rss2_head', 'commentsrss2_head', 'rss_head', 'rdf_header', 'atom_head', 'comments_atom_head', 'opml_head', 'app_head' ) as $action ) {
 268         add_action( $action, 'the_generator' );
 269 }
 270
 271 // Feed Site Icon
 272 add_action( 'atom_head', 'atom_site_icon' );
 273 add_action( 'rss2_head', 'rss2_site_icon' );
 274
 275
 276 // WP Cron
 277 if ( !defined( 'DOING_CRON' ) )
 278         add_action( 'init', 'wp_cron' );
 279
 280 // 2 Actions 2 Furious
 281 add_action( 'do_feed_rdf',                'do_feed_rdf',                             10, 1 );
 282 add_action( 'do_feed_rss',                'do_feed_rss',                             10, 1 );
 283 add_action( 'do_feed_rss2',               'do_feed_rss2',                            10, 1 );
 284 add_action( 'do_feed_atom',               'do_feed_atom',                            10, 1 );
 285 add_action( 'do_pings',                   'do_all_pings',                            10, 1 );
 286 add_action( 'do_robots',                  'do_robots'                                      );
 287 add_action( 'set_comment_cookies',        'wp_set_comment_cookies',                  10, 2 );
 288 add_action( 'sanitize_comment_cookies',   'sanitize_comment_cookies'                       );
 289 add_action( 'admin_print_scripts',        'print_emoji_detection_script'                   );
 290 add_action( 'admin_print_scripts',        'print_head_scripts',                      20    );
 291 add_action( 'admin_print_footer_scripts', '_wp_footer_scripts'                             );
 292 add_action( 'admin_print_styles',         'print_emoji_styles'                             );
 293 add_action( 'admin_print_styles',         'print_admin_styles',                      20    );
 294 add_action( 'init',                       'smilies_init',                             5    );
 295 add_action( 'plugins_loaded',             'wp_maybe_load_widgets',                    0    );
 296 add_action( 'plugins_loaded',             'wp_maybe_load_embeds',                     0    );
 297 add_action( 'shutdown',                   'wp_ob_end_flush_all',                      1    );
 298 // Create a revision whenever a post is updated.
 299 add_action( 'post_updated',               'wp_save_post_revision',                   10, 1 );
 300 add_action( 'publish_post',               '_publish_post_hook',                       5, 1 );
 301 add_action( 'transition_post_status',     '_transition_post_status',                  5, 3 );
 302 add_action( 'transition_post_status',     '_update_term_count_on_transition_post_status', 10, 3 );
 303 add_action( 'comment_form',               'wp_comment_form_unfiltered_html_nonce'          );
 304 add_action( 'wp_scheduled_delete',        'wp_scheduled_delete'                            );
 305 add_action( 'wp_scheduled_auto_draft_delete', 'wp_delete_auto_drafts'                      );
 306 add_action( 'admin_init',                 'send_frame_options_header',               10, 0 );
 307 add_action( 'importer_scheduled_cleanup', 'wp_delete_attachment'                           );
 308 add_action( 'upgrader_scheduled_cleanup', 'wp_delete_attachment'                           );
 309 add_action( 'welcome_panel',              'wp_welcome_panel'                               );
 310
 311 // Navigation menu actions
 312 add_action( 'delete_post',                '_wp_delete_post_menu_item'         );
 313 add_action( 'delete_term',                '_wp_delete_tax_menu_item',   10, 3 );
 314 add_action( 'transition_post_status',     '_wp_auto_add_pages_to_menu', 10, 3 );
 315
 316 // Post Thumbnail CSS class filtering
 317 add_action( 'begin_fetch_post_thumbnail_html', '_wp_post_thumbnail_class_filter_add'    );
 318 add_action( 'end_fetch_post_thumbnail_html',   '_wp_post_thumbnail_class_filter_remove' );
 319
 320 // Redirect Old Slugs
 321 add_action( 'template_redirect',  'wp_old_slug_redirect'              );
 322 add_action( 'post_updated',       'wp_check_for_changed_slugs', 12, 3 );
 323 add_action( 'attachment_updated', 'wp_check_for_changed_slugs', 12, 3 );
 324
 325 // Nonce check for Post Previews
 326 add_action( 'init', '_show_post_preview' );
 327
 328 // Output JS to reset window.name for previews
 329 add_action( 'wp_head', 'wp_post_preview_js', 1 );
 330
 331 // Timezone
 332 add_filter( 'pre_option_gmt_offset','wp_timezone_override_offset' );
 333
 334 // Admin Color Schemes
 335 add_action( 'admin_init', 'register_admin_color_schemes', 1);
 336 add_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );
 337
 338 // If the upgrade hasn't run yet, assume link manager is used.
 339 add_filter( 'default_option_link_manager_enabled', '__return_true' );
 340
 341 // This option no longer exists; tell plugins we always support auto-embedding.
 342 add_filter( 'default_option_embed_autourls', '__return_true' );
 343
 344 // Default settings for heartbeat
 345 add_filter( 'heartbeat_settings', 'wp_heartbeat_settings' );
 346
 347 // Check if the user is logged out
 348 add_action( 'admin_enqueue_scripts', 'wp_auth_check_load' );
 349 add_filter( 'heartbeat_send',        'wp_auth_check' );
 350 add_filter( 'heartbeat_nopriv_send', 'wp_auth_check' );
 351
 352 // Default authentication filters
 353 add_filter( 'authenticate', 'wp_authenticate_username_password',  20, 3 );
 354 add_filter( 'authenticate', 'wp_authenticate_email_password',     20, 3 );
 355 add_filter( 'authenticate', 'wp_authenticate_spam_check',         99    );
 356 add_filter( 'determine_current_user', 'wp_validate_auth_cookie'          );
 357 add_filter( 'determine_current_user', 'wp_validate_logged_in_cookie', 20 );
 358
 359 // Split term updates.
 360 add_action( 'admin_init',        '_wp_check_for_scheduled_split_terms' );
 361 add_action( 'split_shared_term', '_wp_check_split_default_terms',  10, 4 );
 362 add_action( 'split_shared_term', '_wp_check_split_terms_in_menus', 10, 4 );
 363 add_action( 'split_shared_term', '_wp_check_split_nav_menu_terms', 10, 4 );
 364 add_action( 'wp_split_shared_term_batch', '_wp_batch_split_terms' );
 365
 366 // Email notifications.
 367 add_action( 'comment_post', 'wp_new_comment_notify_moderator' );
 368 add_action( 'comment_post', 'wp_new_comment_notify_postauthor' );
 369 add_action( 'after_password_reset', 'wp_password_change_notification' );
 370 add_action( 'register_new_user',      'wp_send_new_user_notifications' );
 371 add_action( 'edit_user_created_user', 'wp_send_new_user_notifications', 10, 2 );
 372
 373 // REST API actions.
 374 add_action( 'init',          'rest_api_init' );
 375 add_action( 'rest_api_init', 'rest_api_default_filters', 10, 1 );
 376 add_action( 'parse_request', 'rest_api_loaded' );
 377
 378 /**
 379  * Filters formerly mixed into wp-includes
 380  */
 381 // Theme
 382 add_action( 'wp_loaded', '_custom_header_background_just_in_time' );
 383 add_action( 'wp_head', '_custom_logo_header_styles' );
 384 add_action( 'plugins_loaded', '_wp_customize_include' );
 385 add_action( 'admin_enqueue_scripts', '_wp_customize_loader_settings' );
 386 add_action( 'delete_attachment', '_delete_attachment_theme_mod' );
 387
 388 // Calendar widget cache
 389 add_action( 'save_post', 'delete_get_calendar_cache' );
 390 add_action( 'delete_post', 'delete_get_calendar_cache' );
 391 add_action( 'update_option_start_of_week', 'delete_get_calendar_cache' );
 392 add_action( 'update_option_gmt_offset', 'delete_get_calendar_cache' );
 393
 394 // Author
 395 add_action( 'transition_post_status', '__clear_multi_author_cache' );
 396
 397 // Post
 398 add_action( 'init', 'create_initial_post_types', 0 ); // highest priority
 399 add_action( 'admin_menu', '_add_post_type_submenus' );
 400 add_action( 'before_delete_post', '_reset_front_page_settings_for_post' );
 401 add_action( 'wp_trash_post',      '_reset_front_page_settings_for_post' );
 402
 403 // Post Formats
 404 add_filter( 'request', '_post_format_request' );
 405 add_filter( 'term_link', '_post_format_link', 10, 3 );
 406 add_filter( 'get_post_format', '_post_format_get_term' );
 407 add_filter( 'get_terms', '_post_format_get_terms', 10, 3 );
 408 add_filter( 'wp_get_object_terms', '_post_format_wp_get_object_terms' );
 409
 410 // KSES
 411 add_action( 'init', 'kses_init' );
 412 add_action( 'set_current_user', 'kses_init' );
 413
 414 // Script Loader
 415 add_action( 'wp_default_scripts', 'wp_default_scripts' );
 416 add_action( 'wp_enqueue_scripts', 'wp_localize_jquery_ui_datepicker', 1000 );
 417 add_action( 'admin_enqueue_scripts', 'wp_localize_jquery_ui_datepicker', 1000 );
 418 add_filter( 'wp_print_scripts', 'wp_just_in_time_script_localization' );
 419 add_filter( 'print_scripts_array', 'wp_prototype_before_jquery' );
 420 add_filter( 'customize_controls_print_styles', 'wp_resource_hints', 1 );
 421
 422 add_action( 'wp_default_styles', 'wp_default_styles' );
 423 add_filter( 'style_loader_src', 'wp_style_loader_src', 10, 2 );
 424
 425 // Taxonomy
 426 add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority
 427
 428 // Canonical
 429 add_action( 'template_redirect', 'redirect_canonical' );
 430 add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );
 431
 432 // Shortcodes
 433 add_filter( 'the_content', 'do_shortcode', 11 ); // AFTER wpautop()
 434
 435 // Media
 436 add_action( 'wp_playlist_scripts', 'wp_playlist_scripts' );
 437 add_action( 'customize_controls_enqueue_scripts', 'wp_plupload_default_settings' );
 438
 439 // Nav menu
 440 add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 );
 441
 442 // Widgets
 443 add_action( 'init', 'wp_widgets_init', 1 );
 444
 445 // Admin Bar
 446 // Don't remove. Wrong way to disable.
 447 add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
 448 add_action( 'admin_init', '_wp_admin_bar_init' );
 449 add_action( 'before_signup_header', '_wp_admin_bar_init' );
 450 add_action( 'activate_header', '_wp_admin_bar_init' );
 451 add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
 452 add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );
 453
 454 // Former admin filters that can also be hooked on the front end
 455 add_action( 'media_buttons', 'media_buttons' );
 456 add_filter( 'image_send_to_editor', 'image_add_caption', 20, 8 );
 457 add_filter( 'media_send_to_editor', 'image_media_send_to_editor', 10, 3 );
 458
 459 // Embeds
 460 add_action( 'rest_api_init',          'wp_oembed_register_route'              );
 461 add_filter( 'rest_pre_serve_request', '_oembed_rest_pre_serve_request', 10, 4 );
 462
 463 add_action( 'wp_head',                'wp_oembed_add_discovery_links'         );
 464 add_action( 'wp_head',                'wp_oembed_add_host_js'                 );
 465
 466 add_action( 'embed_head',             'enqueue_embed_scripts',           1    );
 467 add_action( 'embed_head',             'print_emoji_detection_script'          );
 468 add_action( 'embed_head',             'print_embed_styles'                    );
 469 add_action( 'embed_head',             'wp_print_head_scripts',          20    );
 470 add_action( 'embed_head',             'wp_print_styles',                20    );
 471 add_action( 'embed_head',             'wp_no_robots'                          );
 472 add_action( 'embed_head',             'rel_canonical'                         );
 473 add_action( 'embed_head',             'locale_stylesheet',              30    );
 474
 475 add_action( 'embed_content_meta',     'print_embed_comments_button'           );
 476 add_action( 'embed_content_meta',     'print_embed_sharing_button'            );
 477
 478 add_action( 'embed_footer',           'print_embed_sharing_dialog'            );
 479 add_action( 'embed_footer',           'print_embed_scripts'                   );
 480 add_action( 'embed_footer',           'wp_print_footer_scripts',        20    );
 481
 482 add_filter( 'excerpt_more',           'wp_embed_excerpt_more',          20    );
 483 add_filter( 'the_excerpt_embed',      'wptexturize'                           );
 484 add_filter( 'the_excerpt_embed',      'convert_chars'                         );
 485 add_filter( 'the_excerpt_embed',      'wpautop'                               );
 486 add_filter( 'the_excerpt_embed',      'shortcode_unautop'                     );
 487 add_filter( 'the_excerpt_embed',      'wp_embed_excerpt_attachment'           );
 488
 489 add_filter( 'oembed_dataparse',       'wp_filter_oembed_result',        10, 3 );
 490 add_filter( 'oembed_response_data',   'get_oembed_response_data_rich',  10, 4 );
 491 add_filter( 'pre_oembed_result',      'wp_filter_pre_oembed_result',    10, 3 );
 492
 493 unset( $filter, $action );