how to search data from other website using curl - php

Question

Hi how can i search data from other website using curl and php. i want to search imei number from this website https://www.example.com/xxx
this is what i have tried so far
$imei = '013887009861498';
$cookie_file_path = "cookies/cookiejar.txt";
$fp = fopen("$cookie_file_path","w") or die("<BR><B>Unable to open cookie file $mycookiefile for write!<BR>");
fclose($fp);
$url="https://example.com/xxx";
$agent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,$imei);
curl_setopt($ch, CURLOPT_USERAGENT, $agent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file_path);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file_path);
$result = curl_exec ($ch);
echo $result ;

Answer 1

(this is not a full answer, but too long to be a comment. i can't be arsed to figure out all the small details for you)
there are several different problems here, the first is how to do a POST request with php/curl, of which you can find an example here.
another problem, is how to parse HTML in PHP, of which there are several options listed here. (i highly recommend the DOMDocument & DOMXPath combo)
another problem, is how to get past CAPTCHA challenges in PHP, 1 solution is to use the deathbycaptcha API (which is a paid service, by the way), you can find an example of that here.
another problem is that they're using 3 different CSRF-like tokens, called __VIEWSTATE, __EVENTVALIDATION, and hdnCaptchaInstance, all of which must be parsed out and submitted with the captcha answer. also you need to handle cookies, as the CSRF tokens and captcha is tied to your cookie session (luckily you can let curl handle cookies automatically with CURLOPT_COOKIEFILE )