" . 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(array $data): string { $req = ""; foreach ($data as $key => $value) { $req .= $key . '=' . urlencode(stripslashes($value)) . '&'; } // Cut the last '&' return substr($req, 0, strlen($req) - 1); } /** * 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(string $path, array $data): array { $req = $this->_encodeQS($data); return file_get_contents($path . $req); } /** * 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(string $remoteIp, string $response): ReCaptchaResponse { // Discard empty solution submissions if ($response == null || strlen($response) == 0) { $recaptchaResponse = new ReCaptchaResponse(); $recaptchaResponse->success = false; $recaptchaResponse->errorCodes = 'missing-input'; return $recaptchaResponse; } $getResponse = $this->_submitHttpGet( self::$_siteVerifyUrl, [ 'secret' => $this->_secret, 'remoteip' => $remoteIp, 'v' => self::$_version, 'response' => $response, ] ); $answers = json_decode($getResponse, true); $recaptchaResponse = new ReCaptchaResponse(); if (trim($answers ['success'])) { $recaptchaResponse->success = true; } else { $recaptchaResponse->success = false; $recaptchaResponse->errorCodes = $answers [error - codes]; } return $recaptchaResponse; } }