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/wp-includes/ -> feed.php (source)

   1  <?php
   2  
   3  function get_bloginfo_rss($show = '') {
   4      $info = strip_tags(get_bloginfo($show));
   5      return apply_filters('get_bloginfo_rss', convert_chars($info));
   6  }
   7  
   8  
   9  function bloginfo_rss($show = '') {
  10      echo apply_filters('bloginfo_rss', get_bloginfo_rss($show));
  11  }
  12  
  13  function get_wp_title_rss($sep = '&#187;') {
  14      $title = wp_title($sep, false);
  15      if ( is_wp_error( $title ) )
  16          return $title->get_error_message();
  17      $title = apply_filters('get_wp_title_rss', $title);
  18      return $title;
  19  }
  20  
  21  function wp_title_rss($sep = '&#187;') {
  22      echo apply_filters('wp_title_rss', get_wp_title_rss($sep));
  23  }
  24  
  25  function get_the_title_rss() {
  26      $title = get_the_title();
  27      $title = apply_filters('the_title_rss', $title);
  28      return $title;
  29  }
  30  
  31  
  32  function the_title_rss() {
  33      echo get_the_title_rss();
  34  }
  35  
  36  
  37  function the_content_rss($more_link_text='(more...)', $stripteaser=0, $more_file='', $cut = 0, $encode_html = 0) {
  38      $content = get_the_content($more_link_text, $stripteaser, $more_file);
  39      $content = apply_filters('the_content_rss', $content);
  40      if ( $cut && !$encode_html )
  41          $encode_html = 2;
  42      if ( 1== $encode_html ) {
  43          $content = wp_specialchars($content);
  44          $cut = 0;
  45      } elseif ( 0 == $encode_html ) {
  46          $content = make_url_footnote($content);
  47      } elseif ( 2 == $encode_html ) {
  48          $content = strip_tags($content);
  49      }
  50      if ( $cut ) {
  51          $blah = explode(' ', $content);
  52          if ( count($blah) > $cut ) {
  53              $k = $cut;
  54              $use_dotdotdot = 1;
  55          } else {
  56              $k = count($blah);
  57              $use_dotdotdot = 0;
  58          }
  59          for ( $i=0; $i<$k; $i++ )
  60              $excerpt .= $blah[$i].' ';
  61          $excerpt .= ($use_dotdotdot) ? '...' : '';
  62          $content = $excerpt;
  63      }
  64      $content = str_replace(']]>', ']]&gt;', $content);
  65      echo $content;
  66  }
  67  
  68  
  69  function the_excerpt_rss() {
  70      $output = get_the_excerpt();
  71      echo apply_filters('the_excerpt_rss', $output);
  72  }
  73  
  74  function the_permalink_rss() {
  75      echo apply_filters('the_permalink_rss', get_permalink());
  76  
  77  }
  78  
  79  function comment_link() {
  80      echo get_comment_link();
  81  }
  82  
  83  
  84  function get_comment_author_rss() {
  85      return apply_filters('comment_author_rss', get_comment_author() );
  86  }
  87  
  88  
  89  function comment_author_rss() {
  90      echo get_comment_author_rss();
  91  }
  92  
  93  
  94  function comment_text_rss() {
  95      $comment_text = get_comment_text();
  96      $comment_text = apply_filters('comment_text_rss', $comment_text);
  97      echo $comment_text;
  98  }
  99  
 100  
 101  function comments_rss_link($link_text = 'Comments RSS', $commentsrssfilename = 'nolongerused') {
 102      $url = get_post_comments_feed_link();
 103      echo "<a href='$url'>$link_text</a>";
 104  }
 105  
 106  
 107  function comments_rss($commentsrssfilename = 'nolongerused') {
 108      return get_post_comments_feed_link();
 109  }
 110  
 111  
 112  function get_author_rss_link($echo = false, $author_id, $author_nicename) {
 113      $auth_ID = (int) $author_id;
 114      $permalink_structure = get_option('permalink_structure');
 115  
 116      if ( '' == $permalink_structure ) {
 117          $link = get_option('home') . '?feed=rss2&amp;author=' . $author_id;
 118      } else {
 119          $link = get_author_posts_url($author_id, $author_nicename);
 120          $link = trailingslashit($link) . user_trailingslashit('feed', 'feed');
 121      }
 122  
 123      $link = apply_filters('author_feed_link', $link);
 124  
 125      if ( $echo )
 126          echo $link;
 127      return $link;
 128  }
 129  
 130  /** get_category_feed_link() - Get the feed link for a given category
 131   *
 132   * Returns a link to the feed for all post in a given category.  A specific feed can be requested
 133   * or left blank to get the default feed.
 134   *
 135   * @package WordPress
 136   * @subpackage Feed
 137   * @since 2.4
 138   *
 139   * @param int $cat_id ID of a category
 140   * @param string $feed Feed type
 141   * @return string Link to the feed for the category specified by $cat_id
 142  */
 143  function get_category_feed_link($cat_id, $feed = 'rss2') {
 144      $cat_id = (int) $cat_id;
 145      
 146      $category = get_category($cat_id);
 147      
 148      if ( empty($category) || is_wp_error($category) )
 149          return false;
 150      
 151      $permalink_structure = get_option('permalink_structure');
 152  
 153      if ( '' == $permalink_structure ) {
 154          $link = get_option('home') . "?feed=$feed&amp;cat=" . $cat_id;
 155      } else {
 156          $link = get_category_link($cat_id);
 157          if( 'rss2' == $feed )
 158              $feed_link = 'feed';
 159          else
 160              $feed_link = "feed/$feed";
 161          
 162          $link = trailingslashit($link) . user_trailingslashit($feed_link, 'feed');
 163      }
 164  
 165      $link = apply_filters('category_feed_link', $link, $feed);
 166      
 167      return $link;
 168  }
 169  
 170  
 171  function get_category_rss_link($echo = false, $cat_ID, $category_nicename) {
 172      $link = get_category_feed_link($cat_ID, $feed = 'rss2');
 173  
 174      if ( $echo )
 175          echo $link;
 176      return $link;
 177  }
 178  
 179  
 180  function get_the_category_rss($type = 'rss') {
 181      $categories = get_the_category();
 182      $tags = get_the_tags();
 183      $home = get_bloginfo_rss('home');
 184      $the_list = '';
 185      $cat_names = array();
 186  
 187      $filter = 'rss';
 188      if ( 'atom' == $type )
 189          $filter = 'raw';
 190  
 191      if ( !empty($categories) ) foreach ( (array) $categories as $category ) {
 192          $cat_names[] = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter);
 193      }
 194  
 195      if ( !empty($tags) ) foreach ( (array) $tags as $tag ) {
 196          $cat_names[] = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter);
 197      }
 198  
 199      $cat_names = array_unique($cat_names);
 200  
 201      foreach ( $cat_names as $cat_name ) {
 202          if ( 'rdf' == $type )
 203              $the_list .= "\n\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
 204          elseif ( 'atom' == $type )
 205              $the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', attribute_escape( apply_filters( 'get_bloginfo_rss', get_bloginfo( 'url' ) ) ), attribute_escape( $cat_name ) );
 206          else
 207              $the_list .= "\n\t\t<category><![CDATA[$cat_name]]></category>\n";
 208      }
 209  
 210      return apply_filters('the_category_rss', $the_list, $type);
 211  }
 212  
 213  
 214  function the_category_rss($type = 'rss') {
 215      echo get_the_category_rss($type);
 216  }
 217  
 218  function get_tag_feed_link($tag_id, $feed = 'rss2') {
 219      $tag_id = (int) $tag_id;
 220  
 221      $tag = get_tag($tag_id);
 222  
 223      if ( empty($tag) || is_wp_error($tag) )
 224          return false;
 225  
 226      $permalink_structure = get_option('permalink_structure');
 227  
 228      if ( '' == $permalink_structure ) {
 229          $link = get_option('home') . "?feed=$feed&amp;tag=" . $tag->slug;
 230      } else {
 231          $link = get_tag_link($tag->term_id);
 232          if ( 'rss2' == $feed )
 233              $feed_link = 'feed';
 234          else
 235              $feed_link = "feed/$feed";
 236          $link = $link . user_trailingslashit($feed_link, 'feed');
 237      }
 238  
 239      $link = apply_filters('tag_feed_link', $link, $feed);
 240  
 241      return $link;
 242  }
 243  
 244  function html_type_rss() {
 245      $type = get_bloginfo('html_type');
 246      if (strpos($type, 'xhtml') !== false)
 247          $type = 'xhtml';
 248      else
 249          $type = 'html';
 250      echo $type;
 251  }
 252  
 253  
 254  function rss_enclosure() {
 255      global $id, $post;
 256      if ( !empty($post->post_password) && ($_COOKIE['wp-postpass_'.COOKIEHASH] != $post->post_password) )
 257          return;
 258  
 259      foreach (get_post_custom() as $key => $val) {
 260          if ($key == 'enclosure') {
 261              foreach ((array)$val as $enc) {
 262                  $enclosure = split("\n", $enc);
 263                  echo apply_filters('rss_enclosure', '<enclosure url="' . trim(htmlspecialchars($enclosure[0])) . '" length="' . trim($enclosure[1]) . '" type="' . trim($enclosure[2]) . '" />' . "\n");
 264              }
 265          }
 266      }
 267  }
 268  
 269  function atom_enclosure() {
 270      global $id, $post;
 271      if ( !empty($post->post_password) && ($_COOKIE['wp-postpass_'.COOKIEHASH] != $post->post_password) )
 272          return;
 273  
 274      foreach (get_post_custom() as $key => $val) {
 275          if ($key == 'enclosure') {
 276              foreach ((array)$val as $enc) {
 277                  $enclosure = split("\n", $enc);
 278                  echo apply_filters('atom_enclosure', '<link href="' . trim(htmlspecialchars($enclosure[0])) . '" rel="enclosure" length="' . trim($enclosure[1]) . '" type="' . trim($enclosure[2]) . '" />' . "\n");
 279              }
 280          }
 281      }
 282  }
 283  
 284  /**
 285   * prep_atom_text_construct() - determine if given string of data is
 286   * type text, html, or xhtml, per RFC 4287 section 3.1.
 287   *
 288   * In the case of WordPress, text is defined as containing no markup,
 289   * xhtml is defined as "well formed", and html as tag soup (i.e., the rest).
 290   *
 291   * Container div tags are added to xhtml values, per section 3.1.1.3.
 292   *
 293   * @package WordPress
 294   * @subpackage Feed
 295   * @since 2.4 
 296   *
 297   * @param string $data input string
 298   * @return array $result array(type, value)
 299   * @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1
 300   */
 301  function prep_atom_text_construct($data) {
 302      if (strpos($data, '<') === false && strpos($data, '&') === false) {
 303          return array('text', $data);
 304      }
 305  
 306      $parser = xml_parser_create();
 307      xml_parse($parser, '<div>' . $data . '</div>', true);
 308      $code = xml_get_error_code($parser);
 309      xml_parser_free($parser);
 310  
 311      if (!$code) {
 312                 if (strpos($data, '<') === false) {
 313                     return array('text', $data);
 314                         } else {
 315                     $data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
 316                     return array('xhtml', $data);
 317                         }
 318      }
 319  
 320      if (strpos($data, ']]>') == false) {
 321          return array('html', "<![CDATA[$data]]>");
 322      } else {
 323          return array('html', htmlspecialchars($data));
 324      }
 325  }
 326  
 327  ?>


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