function post($url = null, $params = null) {
 $ch = curl_init();

 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_HEADER, 1);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);

 if(isset($params['params'])) {
  curl_setopt($ch, CURLOPT_POST, 1);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $params['params']);
 }

 if(isset($params['headers'])) {
  curl_setopt($ch, CURLOPT_HTTPHEADER, $params['headers']);
 }

 if(isset($params['cookies'])) {
  curl_setopt($ch, CURLOPT_COOKIE, $params['cookies']);
 }

 $result = curl_exec($ch);

 list($headers, $result) = explode("\r\n\r\n", $result, 4);

 preg_match_all('|Set-Cookie: (.*);|U', $headers, $parse_cookies);

 $cookies = implode(';', $parse_cookies[1]);

 curl_close($ch);

 return array('headers' => $headers, 'cookies' => $cookies, 'content' => $result);
}