php获取淘宝分类id示例

$url = "http://list.taobao.com/browse/cat-0.htm";
  $html = file_get_contents($url);
  echo '<meta charset="utf-8">';
  $pattern='/<as+href="http://list.taobao.com/itemlist/.*?&cat=([0-9]+)"s+target="_blank">(.*?)</a>/';
  preg_match_all($pattern, $html, $array, preg_set_order);
  foreach($array as $item) {
   echo $item[1] . "=>" . mb_convert_encoding($item[2], 'utf-8', 'gb2312');
   echo "<br />";
  }