PHP采集腾讯微博只留文字部分

<?php  header("Content-type:text/html;charset=utf-8");  $weibo = file_get_contents('http://t.qq.com/starank');    $preg = '/<div class="msgCnt">(.*)<\/div><div class="mediaWrap">/Uis';  preg_match_all($preg, $weibo, $string);    foreach ($string[1] as $key=>$value){      echo delhtml($value)."<br/><br/><br/>";  }    function delhtml($str) // 清除HTML标签  {      $st = -1; //开始      $et = -1; //结束      $stmp = array();      $stmp[] = " ";      $len = strlen($str);      for($i = 0;$i < $len;$i++)      {          $ss = substr($str, $i, 1);          if (ord($ss) == 60) // ord("<")==60          {              $st = $i;          }          if (ord($ss) == 62) // ord(">")==62          {              $et = $i;              if ($st != -1)              {                  $stmp[] = substr($str, $st, $et - $st + 1);              }          }      }      $str = str_replace($stmp, "", $str);      return $str;  }    ?>