" . self::$_signupUrl . ""); } $this->_secret=$secret; } /** * Encodes the given data into a query string format. * * @param array $data array of string elements to be encoded. * * @return string - encoded request. */ private function _encodeQS($data) { $req = ""; foreach ($data as $key => $value) { $req .= $key . '=' . urlencode(stripslashes($value)) . '&'; } // Cut the last '&' $req=substr($req, 0, strlen($req)-1); return $req; } /** * Submits an HTTP GET to a reCAPTCHA server. * * @param string $path url path to recaptcha server. * @param array $data array of parameters to be sent. * * @return array response */ private function _submitHTTPGet($path, $data) { $req = $this->_encodeQS($data); // Try using cURL first. If that fails, fallback to file_get_contents if (function_exists('curl_init')) { $handle = curl_init($path); $queryString = http_build_query($data, '', '&'); $options = array( CURLOPT_POST => true, CURLOPT_POSTFIELDS => $queryString, CURLOPT_HTTPHEADER => array( 'Content-Type: application/x-www-form-urlencoded' ), CURLINFO_HEADER_OUT => false, CURLOPT_HEADER => false, CURLOPT_RETURNTRANSFER => true, CURLOPT_SSL_VERIFYPEER => true ); curl_setopt_array($handle, $options); $response = curl_exec($handle); curl_close($handle); return $response; } $response = file_get_contents($path . $req); return $response; } /** * Calls the reCAPTCHA siteverify API to verify whether the user passes * CAPTCHA test. * * @param string $remoteIp IP address of end user. * @param string $response response string from recaptcha verification. * * @return ReCaptchaResponse */ public function verifyResponse($remoteIp, $response) { // Discard empty solution submissions if ($response == null || strlen($response) == 0) { $recaptchaResponse = new ReCaptchaResponse(); $recaptchaResponse->success = false; $recaptchaResponse->errorCodes = 'missing-input'; return $recaptchaResponse; } $getResponse = $this->_submitHttpGet( self::$_siteVerifyUrl, array ( 'secret' => $this->_secret, 'remoteip' => $remoteIp, 'v' => self::$_version, 'response' => $response ) ); $answers = json_decode($getResponse, true); $recaptchaResponse = new ReCaptchaResponse(); if (trim($answers ['success']) == true) { $recaptchaResponse->success = true; } else { $recaptchaResponse->success = false; $recaptchaResponse->errorCodes = $answers [error-codes]; } return $recaptchaResponse; } } ?>