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   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      add_filter( $filter, 'sanitize_text_field'  );
  25      add_filter( $filter, 'wp_kses_data'       );
  26      add_filter( $filter, '_wp_specialchars', 30 );
  27  }
  28  
  29  // Kses only for textarea saves
  30  foreach ( array( 'pre_term_description', 'pre_link_description', 'pre_link_notes', 'pre_user_description' ) as $filter ) {
  31      add_filter( $filter, 'wp_filter_kses' );
  32  }
  33  
  34  // Kses only for textarea saves displays
  35  foreach ( array( 'term_description', 'link_description', 'link_notes', 'user_description' ) as $filter ) {
  36      add_filter( $filter, 'wp_kses_data' );
  37  }
  38  
  39  // Email saves
  40  foreach ( array( 'pre_comment_author_email', 'pre_user_email' ) as $filter ) {
  41      add_filter( $filter, 'trim'           );
  42      add_filter( $filter, 'sanitize_email' );
  43      add_filter( $filter, 'wp_filter_kses' );
  44  }
  45  
  46  // Email display
  47  foreach ( array( 'comment_author_email', 'user_email' ) as $filter ) {
  48      add_filter( $filter, 'sanitize_email' );
  49      add_filter( $filter, 'wp_kses_data' );
  50  }
  51  
  52  // Save URL
  53  foreach ( array( 'pre_comment_author_url', 'pre_user_url', 'pre_link_url', 'pre_link_image',
  54      'pre_link_rss' ) as $filter ) {
  55      add_filter( $filter, 'wp_strip_all_tags' );
  56      add_filter( $filter, 'esc_url_raw'       );
  57      add_filter( $filter, 'wp_filter_kses'    );
  58  }
  59  
  60  // Display URL
  61  foreach ( array( 'user_url', 'link_url', 'link_image', 'link_rss', 'comment_url' ) as $filter ) {
  62      add_filter( $filter, 'wp_strip_all_tags' );
  63      add_filter( $filter, 'esc_url'           );
  64      add_filter( $filter, 'wp_kses_data'    );
  65  }
  66  
  67  // Slugs
  68  foreach ( array( 'pre_term_slug' ) as $filter ) {
  69      add_filter( $filter, 'sanitize_title' );
  70  }
  71  
  72  // Keys
  73  foreach ( array( 'pre_post_type' ) as $filter ) {
  74      add_filter( $filter, 'sanitize_user' );
  75  }
  76  
  77  // Places to balance tags on input
  78  foreach ( array( 'content_save_pre', 'excerpt_save_pre', 'comment_save_pre', 'pre_comment_content' ) as $filter ) {
  79      add_filter( $filter, 'balanceTags', 50 );
  80  }
  81  
  82  // Format strings for display.
  83  foreach ( array( 'comment_author', 'term_name', 'link_name', 'link_description', 'link_notes', 'bloginfo', 'wp_title', 'widget_title' ) as $filter ) {
  84      add_filter( $filter, 'wptexturize'   );
  85      add_filter( $filter, 'convert_chars' );
  86      add_filter( $filter, 'esc_html'      );
  87  }
  88  
  89  // Format text area for display.
  90  foreach ( array( 'term_description' ) as $filter ) {
  91      add_filter( $filter, 'wptexturize'      );
  92      add_filter( $filter, 'convert_chars'    );
  93      add_filter( $filter, 'wpautop'          );
  94      add_filter( $filter, 'shortcode_unautop');
  95  }
  96  
  97  // Format for RSS
  98  foreach ( array( 'term_name_rss' ) as $filter ) {
  99      add_filter( $filter, 'convert_chars' );
 100  }
 101  
 102  // Display filters
 103  add_filter( 'the_title', 'wptexturize'   );
 104  add_filter( 'the_title', 'convert_chars' );
 105  add_filter( 'the_title', 'trim'          );
 106  
 107  add_filter( 'the_content', 'wptexturize'        );
 108  add_filter( 'the_content', 'convert_smilies'    );
 109  add_filter( 'the_content', 'convert_chars'      );
 110  add_filter( 'the_content', 'wpautop'            );
 111  add_filter( 'the_content', 'shortcode_unautop'  );
 112  add_filter( 'the_content', 'prepend_attachment' );
 113  
 114  add_filter( 'the_excerpt',     'wptexturize'      );
 115  add_filter( 'the_excerpt',     'convert_smilies'  );
 116  add_filter( 'the_excerpt',     'convert_chars'    );
 117  add_filter( 'the_excerpt',     'wpautop'          );
 118  add_filter( 'the_excerpt',     'shortcode_unautop');
 119  add_filter( 'get_the_excerpt', 'wp_trim_excerpt'  );
 120  
 121  add_filter( 'comment_text', 'wptexturize'            );
 122  add_filter( 'comment_text', 'convert_chars'          );
 123  add_filter( 'comment_text', 'make_clickable',      9 );
 124  add_filter( 'comment_text', 'force_balance_tags', 25 );
 125  add_filter( 'comment_text', 'convert_smilies',    20 );
 126  add_filter( 'comment_text', 'wpautop',            30 );
 127  
 128  add_filter( 'comment_excerpt', 'convert_chars' );
 129  
 130  add_filter( 'list_cats',         'wptexturize' );
 131  add_filter( 'single_post_title', 'wptexturize' );
 132  
 133  add_filter( 'wp_sprintf', 'wp_sprintf_l', 10, 2 );
 134  
 135  // RSS filters
 136  add_filter( 'the_title_rss',      'strip_tags'      );
 137  add_filter( 'the_title_rss',      'ent2ncr',      8 );
 138  add_filter( 'the_title_rss',      'esc_html'        );
 139  add_filter( 'the_content_rss',    'ent2ncr',      8 );
 140  add_filter( 'the_excerpt_rss',    'convert_chars'   );
 141  add_filter( 'the_excerpt_rss',    'ent2ncr',      8 );
 142  add_filter( 'comment_author_rss', 'ent2ncr',      8 );
 143  add_filter( 'comment_text_rss',   'ent2ncr',      8 );
 144  add_filter( 'comment_text_rss',   'esc_html'        );
 145  add_filter( 'bloginfo_rss',       'ent2ncr',      8 );
 146  add_filter( 'the_author',         'ent2ncr',      8 );
 147  
 148  // Misc filters
 149  add_filter( 'option_ping_sites',    'privacy_ping_filter'                 );
 150  add_filter( 'option_blog_charset',  '_wp_specialchars'                    ); // IMPORTANT: This must not be wp_specialchars() or esc_html() or it'll cause an infinite loop
 151  add_filter( 'option_home',          '_config_wp_home'                     );
 152  add_filter( 'option_siteurl',       '_config_wp_siteurl'                  );
 153  add_filter( 'tiny_mce_before_init', '_mce_set_direction'                  );
 154  add_filter( 'pre_kses',             'wp_pre_kses_less_than'               );
 155  add_filter( 'sanitize_title',       'sanitize_title_with_dashes'          );
 156  add_action( 'check_comment_flood',  'check_comment_flood_db',       10, 3 );
 157  add_filter( 'comment_flood_filter', 'wp_throttle_comment_flood',    10, 3 );
 158  add_filter( 'pre_comment_content',  'wp_rel_nofollow',              15    );
 159  add_filter( 'comment_email',        'antispambot'                         );
 160  add_filter( 'option_tag_base',      '_wp_filter_taxonomy_base'            );
 161  add_filter( 'option_category_base', '_wp_filter_taxonomy_base'            );
 162  add_filter( 'the_posts',            '_close_comments_for_old_posts'       );
 163  add_filter( 'comments_open',        '_close_comments_for_old_post', 10, 2 );
 164  add_filter( 'pings_open',           '_close_comments_for_old_post', 10, 2 );
 165  add_filter( 'editable_slug',        'urldecode'                           );
 166  
 167  // Atom SSL support
 168  add_filter( 'atom_service_url','atom_service_url_filter' );
 169  
 170  // Actions
 171  add_action( 'wp_head',             'wp_enqueue_scripts',             1    );
 172  add_action( 'wp_head',             'feed_links_extra',               3    );
 173  add_action( 'wp_head',             'rsd_link'                             );
 174  add_action( 'wp_head',             'wlwmanifest_link'                     );
 175  add_action( 'wp_head',             'index_rel_link'                       );
 176  add_action( 'wp_head',             'parent_post_rel_link',          10, 0 );
 177  add_action( 'wp_head',             'start_post_rel_link',           10, 0 );
 178  add_action( 'wp_head',             'adjacent_posts_rel_link',       10, 0 );
 179  add_action( 'wp_head',             'locale_stylesheet'                    );
 180  add_action( 'publish_future_post', 'check_and_publish_future_post', 10, 1 );
 181  add_action( 'wp_head',             'noindex',                        1    );
 182  add_action( 'wp_head',             'wp_print_styles',                8    );
 183  add_action( 'wp_head',             'wp_print_head_scripts',          9    );
 184  add_action( 'wp_head',             'wp_generator'                         );
 185  add_action( 'wp_head',             'rel_canonical'                        );
 186  add_action( 'wp_footer',           'wp_print_footer_scripts'              );
 187  
 188  // WP Cron
 189  if ( !defined( 'DOING_CRON' ) )
 190      add_action( 'sanitize_comment_cookies', 'wp_cron' );
 191  
 192  // 2 Actions 2 Furious
 193  add_action( 'do_feed_rdf',                'do_feed_rdf',             10, 1 );
 194  add_action( 'do_feed_rss',                'do_feed_rss',             10, 1 );
 195  add_action( 'do_feed_rss2',               'do_feed_rss2',            10, 1 );
 196  add_action( 'do_feed_atom',               'do_feed_atom',            10, 1 );
 197  add_action( 'do_pings',                   'do_all_pings',            10, 1 );
 198  add_action( 'do_robots',                  'do_robots'                      );
 199  add_action( 'sanitize_comment_cookies',   'sanitize_comment_cookies'       );
 200  add_action( 'admin_print_scripts',        'print_head_scripts',      20    );
 201  add_action( 'admin_print_footer_scripts', 'print_footer_scripts',    20    );
 202  add_action( 'admin_print_styles',         'print_admin_styles',      20    );
 203  add_action( 'init',                       'smilies_init',             5    );
 204  add_action( 'plugins_loaded',             'wp_maybe_load_widgets',    0    );
 205  add_action( 'plugins_loaded',             'wp_maybe_load_embeds',     0    );
 206  add_action( 'shutdown',                   'wp_ob_end_flush_all',      1    );
 207  add_action( 'pre_post_update',            'wp_save_post_revision'          );
 208  add_action( 'publish_post',               '_publish_post_hook',       5, 1 );
 209  add_action( 'future_post',                '_future_post_hook',        5, 2 );
 210  add_action( 'future_page',                '_future_post_hook',        5, 2 );
 211  add_action( 'save_post',                  '_save_post_hook',          5, 2 );
 212  add_action( 'transition_post_status',     '_transition_post_status',  5, 3 );
 213  add_action( 'comment_form', 'wp_comment_form_unfiltered_html_nonce'        );
 214  add_action( 'wp_scheduled_delete',        'wp_scheduled_delete' );
 215  
 216  // Post Thumbnail CSS class filtering
 217  add_action( 'begin_fetch_post_thumbnail_html', '_wp_post_thumbnail_class_filter_add'    );
 218  add_action( 'end_fetch_post_thumbnail_html',   '_wp_post_thumbnail_class_filter_remove' );
 219  
 220  // Redirect Old Slugs
 221  add_action( 'template_redirect',  'wp_old_slug_redirect'       );
 222  add_action( 'edit_post',          'wp_check_for_changed_slugs' );
 223  add_action( 'edit_form_advanced', 'wp_remember_old_slug'       );
 224  add_action( 'init',               '_show_post_preview'         );
 225  
 226  // Timezone
 227  add_filter( 'pre_option_gmt_offset','wp_timezone_override_offset' );