curl command to print query string parameters in php

Question

Is there any command in php curl to print response query string parameters

Below is my php code

      <?php
      session_start();

      $ch = curl_init();
      curl_setopt($ch, CURLOPT_URL,"http://192.168.1.220/cgi-bin/handle_login.tcl");
     curl_setopt($ch, CURLOPT_POST, TRUE);
     curl_setopt($ch, CURLOPT_POSTFIELDS,
        "user=admin&pw=admin&submit=Login&sid=' '");        
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: x-www-form-urlencoded'));

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); 
     $response = curl_exec($ch);
     echo "$response";
     curl_close ($ch);
  ?>

below is header response

      Request URL:http://localhost:8080/cgi-bin/frameset.tcl?
      sid=3514275041172666092
      Request Method:GET
      Status Code:404 Not Found
      Remote Address:[::1]:8080
      Referrer Policy:no-referrer-when-downgrade

Response Headers

    Accept-Ranges:bytes
    Connection:Keep-Alive
    Content-Language:en
    Content-Type:text/html; charset=utf-8
    Date:Mon, 29 May 2017 06:54:33 GMT
    Keep-Alive:timeout=5, max=99
    Server:Apache/2.4.18 (Win32) OpenSSL/1.0.2e PHP/7.0.4
    Transfer-Encoding:chunked
    Vary:accept-language,accept-charset

Request Headers

  Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,
         */*;q=0.8
  Accept-Encoding:gzip, deflate, sdch, br
  Accept-Language:en-US,en;q=0.8
  Connection:keep-alive
  Cookie:PHPSESSID=hj7kbp4hp0pjq16m1tk7j3goo3; _ga=GA1.1.981975196.1489736033; XDEBUG_TRACE=XDEBUG_ECLIPSE
  DNT:1
  Host:localhost:8080
  Referer:http://localhost:8080/nias/automate.php
  Upgrade-Insecure-Requests:1
  User-Agent:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Query String Parameters

    sid=3514275041172666092 //need to print these value

Answer 1

Since output was in string format and the output remains constant eachtime..needed to find the position of the required character in the string and extract the required value..

Below is the code

           $response= curl_exec($ch);//executes the curl
           echo strpos("$response","variable_to_find")."<br/>";//know the position
           $sid = substr($response,position,length);