我需要做的是……

我正在检查网址中的PMD,如果这样回应：

<?PHP 
        if ( isset($_GET['pmd']) ) { 
          echo"<div class=\"response\"><p style=\"width:350px; height:200px; vertical-align:middle;\"><strong>Thank you for acting as a &quot;watchman on the walls&quot; of Jerusalem! Your name will now appear on our virtual wall.<br><br>You can also catch up on the latest news from Israel by visiting our news Feed below.</strong></p></div>";
        }else { etc...

我需要包含的内容是像触发跟踪像素的图像.

<img src="url.com?cid=12345&aid=1234&oid=<?PHP echo mt_rand(); ?>&quantity=1" height="1" width="1" />

我想拥有的是：

<?PHP 
        if ( isset($_GET['pmd']) ) { 
          echo"<div class=\"response\"><p style=\"width:350px; height:200px; vertical-align:middle;\"><strong>Thank you for acting as a &quot;watchman on the walls&quot; of Jerusalem! Your name will now appear on our virtual wall.<br><br>You can also catch up on the latest news from Israel by visiting our news Feed below.</strong></p>
          <br />
          <img src="url.com?cid=12345&aid=1234&oid=<?PHP echo mt_rand(); ?>&quantity=1" height="1" width="1" />
          </div>";
        }else {

要使mt_rand()函数触发,我需要做什么？

谢谢,

马特