WordPress/wp-includes/default-filters.php
Gary Pendergast 46e2a65cf1 Add emoji support, with Twemoji fallback.
Replace exisiting smilies with equivalent emoji, or with shiny new smiley images where no emoji existed.

Props batmoo, joen and mkaz for the original plugin upon which this is based.

Props pento, iseulde, kraftbj and peterwilsoncc for making the internet's dreams come true.

See #31242


Built from https://develop.svn.wordpress.org/trunk@31733


git-svn-id: http://core.svn.wordpress.org/trunk@31714 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-03-11 22:49:28 +00:00

391 lines
18 KiB
PHP

<?php
/**
* Sets up the default filters and actions for most
* of the WordPress hooks.
*
* If you need to remove a default hook, this file will
* give you the priority for which to use to remove the
* hook.
*
* Not all of the default hooks are found in default-filters.php
*
* @package WordPress
*/
// Strip, trim, kses, special chars for string saves
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 ) {
add_filter( $filter, 'sanitize_text_field' );
add_filter( $filter, 'wp_filter_kses' );
add_filter( $filter, '_wp_specialchars', 30 );
}
// Strip, kses, special chars for string display
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 ) {
if ( is_admin() ) {
// These are expensive. Run only on admin pages for defense in depth.
add_filter( $filter, 'sanitize_text_field' );
add_filter( $filter, 'wp_kses_data' );
}
add_filter( $filter, '_wp_specialchars', 30 );
}
// Kses only for textarea saves
foreach ( array( 'pre_term_description', 'pre_link_description', 'pre_link_notes', 'pre_user_description' ) as $filter ) {
add_filter( $filter, 'wp_filter_kses' );
}
// Kses only for textarea admin displays
if ( is_admin() ) {
foreach ( array( 'term_description', 'link_description', 'link_notes', 'user_description' ) as $filter ) {
add_filter( $filter, 'wp_kses_data' );
}
add_filter( 'comment_text', 'wp_kses_post' );
}
// Email saves
foreach ( array( 'pre_comment_author_email', 'pre_user_email' ) as $filter ) {
add_filter( $filter, 'trim' );
add_filter( $filter, 'sanitize_email' );
add_filter( $filter, 'wp_filter_kses' );
}
// Email admin display
foreach ( array( 'comment_author_email', 'user_email' ) as $filter ) {
add_filter( $filter, 'sanitize_email' );
if ( is_admin() )
add_filter( $filter, 'wp_kses_data' );
}
// Save URL
foreach ( array( 'pre_comment_author_url', 'pre_user_url', 'pre_link_url', 'pre_link_image',
'pre_link_rss', 'pre_post_guid' ) as $filter ) {
add_filter( $filter, 'wp_strip_all_tags' );
add_filter( $filter, 'esc_url_raw' );
add_filter( $filter, 'wp_filter_kses' );
}
// Display URL
foreach ( array( 'user_url', 'link_url', 'link_image', 'link_rss', 'comment_url', 'post_guid' ) as $filter ) {
if ( is_admin() )
add_filter( $filter, 'wp_strip_all_tags' );
add_filter( $filter, 'esc_url' );
if ( is_admin() )
add_filter( $filter, 'wp_kses_data' );
}
// Slugs
add_filter( 'pre_term_slug', 'sanitize_title' );
// Keys
foreach ( array( 'pre_post_type', 'pre_post_status', 'pre_post_comment_status', 'pre_post_ping_status' ) as $filter ) {
add_filter( $filter, 'sanitize_key' );
}
// Mime types
add_filter( 'pre_post_mime_type', 'sanitize_mime_type' );
add_filter( 'post_mime_type', 'sanitize_mime_type' );
// Places to balance tags on input
foreach ( array( 'content_save_pre', 'excerpt_save_pre', 'comment_save_pre', 'pre_comment_content' ) as $filter ) {
add_filter( $filter, 'balanceTags', 50 );
}
// Format strings for display.
foreach ( array( 'comment_author', 'term_name', 'link_name', 'link_description', 'link_notes', 'bloginfo', 'wp_title', 'widget_title' ) as $filter ) {
add_filter( $filter, 'wptexturize' );
add_filter( $filter, 'convert_chars' );
add_filter( $filter, 'esc_html' );
}
// Format WordPress
foreach ( array( 'the_content', 'the_title', 'wp_title' ) as $filter )
add_filter( $filter, 'capital_P_dangit', 11 );
add_filter( 'comment_text', 'capital_P_dangit', 31 );
// Format titles
foreach ( array( 'single_post_title', 'single_cat_title', 'single_tag_title', 'single_month_title', 'nav_menu_attr_title', 'nav_menu_description' ) as $filter ) {
add_filter( $filter, 'wptexturize' );
add_filter( $filter, 'strip_tags' );
}
// Format text area for display.
foreach ( array( 'term_description' ) as $filter ) {
add_filter( $filter, 'wptexturize' );
add_filter( $filter, 'convert_chars' );
add_filter( $filter, 'wpautop' );
add_filter( $filter, 'shortcode_unautop');
}
// Format for RSS
add_filter( 'term_name_rss', 'convert_chars' );
// Pre save hierarchy
add_filter( 'wp_insert_post_parent', 'wp_check_post_hierarchy_for_loops', 10, 2 );
add_filter( 'wp_update_term_parent', 'wp_check_term_hierarchy_for_loops', 10, 3 );
// Display filters
add_filter( 'the_title', 'wptexturize' );
add_filter( 'the_title', 'convert_chars' );
add_filter( 'the_title', 'trim' );
add_filter( 'the_content', 'wptexturize' );
add_filter( 'the_content', 'convert_smilies' );
add_filter( 'the_content', 'convert_chars' );
add_filter( 'the_content', 'wpautop' );
add_filter( 'the_content', 'shortcode_unautop' );
add_filter( 'the_content', 'prepend_attachment' );
add_filter( 'the_excerpt', 'wptexturize' );
add_filter( 'the_excerpt', 'convert_smilies' );
add_filter( 'the_excerpt', 'convert_chars' );
add_filter( 'the_excerpt', 'wpautop' );
add_filter( 'the_excerpt', 'shortcode_unautop');
add_filter( 'get_the_excerpt', 'wp_trim_excerpt' );
add_filter( 'comment_text', 'wptexturize' );
add_filter( 'comment_text', 'convert_chars' );
add_filter( 'comment_text', 'make_clickable', 9 );
add_filter( 'comment_text', 'force_balance_tags', 25 );
add_filter( 'comment_text', 'convert_smilies', 20 );
add_filter( 'comment_text', 'wpautop', 30 );
add_filter( 'comment_excerpt', 'convert_chars' );
add_filter( 'list_cats', 'wptexturize' );
add_filter( 'wp_sprintf', 'wp_sprintf_l', 10, 2 );
// RSS filters
add_filter( 'the_title_rss', 'strip_tags' );
add_filter( 'the_title_rss', 'ent2ncr', 8 );
add_filter( 'the_title_rss', 'esc_html' );
add_filter( 'the_content_rss', 'ent2ncr', 8 );
add_filter( 'the_content_feed', 'feed_emoji' );
add_filter( 'the_excerpt_rss', 'convert_chars' );
add_filter( 'the_excerpt_rss', 'ent2ncr', 8 );
add_filter( 'comment_author_rss', 'ent2ncr', 8 );
add_filter( 'comment_text_rss', 'ent2ncr', 8 );
add_filter( 'comment_text_rss', 'esc_html' );
add_filter( 'comment_text_rss', 'feed_emoji' );
add_filter( 'bloginfo_rss', 'ent2ncr', 8 );
add_filter( 'the_author', 'ent2ncr', 8 );
add_filter( 'the_guid', 'esc_url' );
// Email filters
add_filter( 'wp_mail', 'mail_emoji' );
// Misc filters
add_filter( 'option_ping_sites', 'privacy_ping_filter' );
add_filter( 'option_blog_charset', '_wp_specialchars' ); // IMPORTANT: This must not be wp_specialchars() or esc_html() or it'll cause an infinite loop
add_filter( 'option_blog_charset', '_canonical_charset' );
add_filter( 'option_home', '_config_wp_home' );
add_filter( 'option_siteurl', '_config_wp_siteurl' );
add_filter( 'tiny_mce_before_init', '_mce_set_direction' );
add_filter( 'teeny_mce_before_init', '_mce_set_direction' );
add_filter( 'pre_kses', 'wp_pre_kses_less_than' );
add_filter( 'sanitize_title', 'sanitize_title_with_dashes', 10, 3 );
add_action( 'check_comment_flood', 'check_comment_flood_db', 10, 3 );
add_filter( 'comment_flood_filter', 'wp_throttle_comment_flood', 10, 3 );
add_filter( 'pre_comment_content', 'wp_rel_nofollow', 15 );
add_filter( 'comment_email', 'antispambot' );
add_filter( 'option_tag_base', '_wp_filter_taxonomy_base' );
add_filter( 'option_category_base', '_wp_filter_taxonomy_base' );
add_filter( 'the_posts', '_close_comments_for_old_posts', 10, 2);
add_filter( 'comments_open', '_close_comments_for_old_post', 10, 2 );
add_filter( 'pings_open', '_close_comments_for_old_post', 10, 2 );
add_filter( 'editable_slug', 'urldecode' );
add_filter( 'editable_slug', 'esc_textarea' );
add_filter( 'nav_menu_meta_box_object', '_wp_nav_menu_meta_box_object' );
add_filter( 'pingback_ping_source_uri', 'pingback_ping_source_uri' );
add_filter( 'xmlrpc_pingback_error', 'xmlrpc_pingback_error' );
add_filter( 'title_save_pre', 'trim' );
add_filter( 'http_request_host_is_external', 'allowed_http_request_hosts', 10, 2 );
// Actions
add_action( 'wp_head', '_wp_render_title_tag', 1 );
add_action( 'wp_head', 'wp_enqueue_scripts', 1 );
add_action( 'wp_head', 'feed_links', 2 );
add_action( 'wp_head', 'feed_links_extra', 3 );
add_action( 'wp_head', 'rsd_link' );
add_action( 'wp_head', 'wlwmanifest_link' );
add_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
add_action( 'wp_head', 'locale_stylesheet' );
add_action( 'publish_future_post', 'check_and_publish_future_post', 10, 1 );
add_action( 'wp_head', 'noindex', 1 );
add_action( 'wp_head', 'wp_print_styles', 8 );
add_action( 'wp_head', 'wp_print_head_scripts', 9 );
add_action( 'wp_head', 'wp_generator' );
add_action( 'wp_head', 'rel_canonical' );
add_action( 'wp_footer', 'wp_print_footer_scripts', 20 );
add_action( 'wp_head', 'wp_shortlink_wp_head', 10, 0 );
add_action( 'template_redirect', 'wp_shortlink_header', 11, 0 );
add_action( 'wp_print_footer_scripts', '_wp_footer_scripts' );
add_action( 'init', 'check_theme_switched', 99 );
add_action( 'after_switch_theme', '_wp_sidebars_changed' );
add_action( 'wp_print_styles', 'print_emoji_styles' );
if ( isset( $_GET['replytocom'] ) )
add_action( 'wp_head', 'wp_no_robots' );
// Login actions
add_action( 'login_head', 'wp_print_head_scripts', 9 );
add_action( 'login_footer', 'wp_print_footer_scripts', 20 );
add_action( 'login_init', 'send_frame_options_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' );
}
// WP Cron
if ( !defined( 'DOING_CRON' ) )
add_action( 'init', 'wp_cron' );
// 2 Actions 2 Furious
add_action( 'do_feed_rdf', 'do_feed_rdf', 10, 1 );
add_action( 'do_feed_rss', 'do_feed_rss', 10, 1 );
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, 1 );
add_action( 'do_robots', 'do_robots' );
add_action( 'set_comment_cookies', 'wp_set_comment_cookies', 10, 2 );
add_action( 'sanitize_comment_cookies', 'sanitize_comment_cookies' );
add_action( 'admin_print_scripts', 'print_head_scripts', 20 );
add_action( 'admin_print_footer_scripts', '_wp_footer_scripts' );
add_action( 'admin_print_styles', 'print_admin_styles', 20 );
add_action( 'admin_print_styles', 'print_emoji_styles' );
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( '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' );
add_action( 'wp_scheduled_delete', 'wp_scheduled_delete' );
add_action( 'wp_scheduled_auto_draft_delete', 'wp_delete_auto_drafts' );
add_action( 'admin_init', 'send_frame_options_header', 10, 0 );
add_action( 'importer_scheduled_cleanup', 'wp_delete_attachment' );
add_action( 'upgrader_scheduled_cleanup', 'wp_delete_attachment' );
add_action( 'welcome_panel', 'wp_welcome_panel' );
// 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 );
// Post Thumbnail CSS class 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' );
// Redirect Old Slugs
add_action( 'template_redirect', 'wp_old_slug_redirect' );
add_action( 'post_updated', 'wp_check_for_changed_slugs', 12, 3 );
// Nonce check for Post Previews
add_action( 'init', '_show_post_preview' );
// Timezone
add_filter( 'pre_option_gmt_offset','wp_timezone_override_offset' );
// Admin Color Schemes
add_action( 'admin_init', 'register_admin_color_schemes', 1);
add_action( 'admin_color_scheme_picker', 'admin_color_scheme_picker' );
// 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( 'default_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_spam_check', 99 );
add_filter( 'determine_current_user', 'wp_validate_auth_cookie' );
add_filter( 'determine_current_user', 'wp_validate_logged_in_cookie', 20 );
// Split term updates.
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 );
/**
* Filters formerly mixed into wp-includes
*/
// Theme
add_action( 'setup_theme', 'preview_theme' );
add_action( 'wp_loaded', '_custom_header_background_just_in_time' );
add_action( 'plugins_loaded', '_wp_customize_include' );
add_action( 'admin_enqueue_scripts', '_wp_customize_loader_settings' );
add_action( 'delete_attachment', '_delete_attachment_theme_mod' );
// 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' );
// 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_filter( 'wp_print_scripts', 'wp_just_in_time_script_localization' );
add_filter( 'print_scripts_array', 'wp_prototype_before_jquery' );
add_action( 'wp_default_styles', 'wp_default_styles' );
add_filter( 'style_loader_src', 'wp_style_loader_src', 10, 2 );
// Taxonomy
add_action( 'init', 'create_initial_taxonomies', 0 ); // highest priority
// Canonical
add_action( 'template_redirect', 'redirect_canonical' );
add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );
// Shortcodes
add_filter( 'the_content', 'do_shortcode', 11 ); // AFTER wpautop()
// Media
add_action( 'wp_playlist_scripts', 'wp_playlist_scripts' );
add_action( 'customize_controls_enqueue_scripts', 'wp_plupload_default_settings' );
// Nav menu
add_filter( 'nav_menu_item_id', '_nav_menu_item_id_use_once', 10, 2 );
// 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_footer', 'wp_admin_bar_render', 1000 );
add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );
unset( $filter, $action );