PHP 用 tidy_parse_file() 函數提取 HTML 中的鏈接

<?php
      function dump_urls(tidy_node $node, &$urls = NULL) {
            $urls = (is_array($urls)) ? $urls : array();


        if(isset($node->id)) {
              if($node->id == TIDY_TAG_A) {
                    $urls[] = $node->attribute['href'];
              }
        }

        if($node->hasChildren()) {
              foreach($node->child as $child) {
                    dump_urls($child, $urls);
              }
        }
                   return $urls;
  }

  $tidy = tidy_parse_file("http://www.php.net/");
  $urls = dump_urls($tidy->body());
  print_r($urls);

?></pre>