Написал регистратор ICQ, капчу и "сессии" парсит нормально. Не хочет регистрироваться. Подозреваю, что в условии что то не так, так как выдает чистый документ.
Вот код:

<?php
$url = "https://www.icq.com/register/";
$user_cookie_file = $_SERVER['DOCUMENT_ROOT'].'/cookies.txt';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_REFERER, $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)");
curl_setopt($ch, CURLOPT_COOKIEFILE, $user_cookie_file);
curl_setopt($ch, CURLOPT_COOKIEJAR,  $user_cookie_file);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
$result = curl_exec($ch);
preg_match('#(?<=name\=\"gnm\" value\=\").*(?=\"\>\<img)#', $result, $gnm);
for ($i=0;$i<count($gnm);$i++){
  $agnm = $gnm[$i];
  } 
preg_match('#(?<=icq_ln\" value\=\").*(?=\"\>)#', $result, $in);
for ($i=0;$i<count($in);$i++){
  $ain = $in[$i];
  } 
//echo $agnm, "<br>", $ain, "<br>", "<img src=captcha.jpg>";
preg_match('#(?<=img src\=\"\/).*(?=\" border\=\"0\" width\=\"240\" height\=\"100\"\>\<\/td\>)#', $result, $key);
for ($i=0;$i<count($key);$i++){
  $a=$key[$i];
  } 
$result2="https://www.icq.com/".$a."";
curl_setopt($ch, CURLOPT_URL,$result2);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_REFERER, $url);
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)");
curl_setopt($ch, CURLOPT_COOKIEFILE, $user_cookie_file);
curl_setopt($ch, CURLOPT_COOKIEJAR,  $user_cookie_file);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
$urlca = curl_exec($ch);
file_put_contents('captcha.jpg', $urlca);
return $a;
function pars($url) {
	   $user_cookie_file = $_SERVER['DOCUMENT_ROOT'].'/cookies.txt';
	   $postdata = array (
 	    'service' => '30',
 	    'lg_id' => '',
 	    'qtype' => '',
 	    'icq_ln' => $ain,
 	    'nickname' => 'jk4ygj',
 	    'fname' => '',
 	    'lname' => '',
	    'email' => $_GET['email'],
 	    'gender' => '0',
	    'age' => '13',
	    'password' => $_GET['pass'],
	    'password_confirm' => $_GET['pass'],
	    'qa1' => 'What is your pet\'s name?',
 	    'userq1' => '',
	    'answer1' => 'qwwer',
 	    'gnm' => $agnm,
  	    'word' => $_GET['cap'],
	    'key' => '',
	    'lang' => 'en',
	   );
	   $ch = curl_init($url);
	   curl_setopt($ch, CURLOPT_URL,$url);
	   curl_setopt($ch, CURLOPT_REFERER, $url);
	   curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)");
	   curl_setopt($ch, CURLOPT_COOKIEFILE, $user_cookie_file);
	   curl_setopt($ch, CURLOPT_COOKIEJAR,  $user_cookie_file);
	   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	   curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	   curl_setopt($ch, CURLOPT_POST, 1);
	   curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
       $result = curl_exec($ch);
       curl_close($ch);
	   echo $result;
       }
if (!empty($_GET['cap']))
{
    pars($url);
}
else
{
	$form = '<h2>Введите код с картинки</h2>
	<img src="captcha.jpg">
	<form method="GET" action="icq.php">
	<input type="text" name="cap">
	<h2>E-mail:<input type="text" name="email">
	Пароль:<input type="text" name="pass"></h2>
	<input type="submit"></form>';
	echo $form;
}
?>