cURL和POST/Login后的URL刷新

我正在尝试创建一个PHP脚本，该脚本将登录到网站，在登录后使用CURLOPT_RETURNTTRANSFER返回URL信息，然后分析这些数据以查找特定的匹配项。我想知道是否有一种方法可以刷新returntransfer数据，而无需注销并登录回网站？到目前为止，我必须完全注销，然后登录才能在returntransfer中获得新的http字符串。我是PHP和cURL的新手，所以如果这个问题含糊不清，请原谅我。下面是示例代码，正如您所看到的，基于标志，代码将继续循环，直到标志设置为true。

<?php

 if(isset($_POST['userName']))
     {

       $cookie_file_path = "cookie.txt";     
       $data = array('Username' => $_POST['userName'],'Password' =>$_POST['userPassword']);
       $agent = "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915 Firefox/1.0.7";
       $reffer = "https://someurl/Login.aspx?action=login";
       $ch = curl_init();
       curl_setopt($ch, CURLOPT_URL,"https://someurl/Login.aspx?action=login");   
       curl_setopt($ch, CURLOPT_USERAGENT, $agent);
       curl_setopt($ch, CURLOPT_HEADER, 1); 
       curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_fie_path);
       curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file_path);
       curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
       curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
       curl_setopt($ch,CURLOPT_REFERER,$reffer);
       curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
       curl_setopt($ch,CURLOPT_POST,1);
       curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
       $html= curl_exec($ch);
       echo $html; 
       curl_close($ch);
       $flagOfFound=0;
       do {
       //process the message
       //......
       //set $flagOfFound = true of there is match
       //else
       //refresh message/http returntransfer while still logged in
       }           
       while ($flagOfFound == 0);
     }
?>