Wordpress 4.6
[autoinstalls/wordpress.git] / 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 );