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<?php
/**
* This is a PHP library that handles calling reCAPTCHA.
*
* @copyright Copyright (c) 2015, Google Inc.
* @link http://www.google.com/recaptcha
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
namespace ReCaptcha;
/**
* reCAPTCHA client.
*/
class ReCaptcha
{
/**
* Version of this client library.
* @const string
*/
const VERSION = 'php_1.1.2';
/**
* Shared secret for the site.
* @var string
*/
private $secret;
/**
* Method used to communicate with service. Defaults to POST request.
* @var RequestMethod
*/
private $requestMethod;
/**
* Create a configured instance to use the reCAPTCHA service.
*
* @param string $secret shared secret between site and reCAPTCHA server.
* @param RequestMethod $requestMethod method used to send the request. Defaults to POST.
* @throws \RuntimeException if $secret is invalid
*/
public function __construct($secret, RequestMethod $requestMethod = null)
{
if (empty($secret)) {
throw new \RuntimeException('No secret provided');
}
if (!is_string($secret)) {
throw new \RuntimeException('The provided secret must be a string');
}
$this->secret = $secret;
if (!is_null($requestMethod)) {
$this->requestMethod = $requestMethod;
} else {
$this->requestMethod = new RequestMethod\Post();
}
}
/**
* Calls the reCAPTCHA siteverify API to verify whether the user passes
* CAPTCHA test.
*
* @param string $response The value of 'g-recaptcha-response' in the submitted form.
* @param string $remoteIp The end user's IP address.
* @return Response Response from the service.
*/
public function verify($response, $remoteIp = null)
{
// Discard empty solution submissions
if (empty($response)) {
$recaptchaResponse = new Response(false, array('missing-input-response'));
return $recaptchaResponse;
}
$params = new RequestParameters($this->secret, $response, $remoteIp, self::VERSION);
$rawResponse = $this->requestMethod->submit($params);
return Response::fromJson($rawResponse);
}
}
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