public static function checkCaptcha()
 {
     $userResponse = RequestHelper::getParameter("g-recaptcha-response");
     $url = ReCaptcha::CHECK_SERVER_URL;
     $data = array('secret' => ReCaptcha::SECRET_KEY, 'response' => $userResponse);
     $captchaServerResponse = ReCaptchaUtils::sendPostRequest($url, $data);
     return ReCaptchaUtils::getCaptchaCheckResult($captchaServerResponse);
 }