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  1. <?php
  2. /**
  3.  * This is a PHP library that handles calling reCAPTCHA.
  4.  *
  5.  * @copyright Copyright (c) 2015, Google Inc.
  6.  * @link      http://www.google.com/recaptcha
  7.  *
  8.  * Permission is hereby granted, free of charge, to any person obtaining a copy
  9.  * of this software and associated documentation files (the "Software"), to deal
  10.  * in the Software without restriction, including without limitation the rights
  11.  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12.  * copies of the Software, and to permit persons to whom the Software is
  13.  * furnished to do so, subject to the following conditions:
  14.  *
  15.  * The above copyright notice and this permission notice shall be included in
  16.  * all copies or substantial portions of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21.  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24.  * THE SOFTWARE.
  25.  */
  26.  
  27. namespace ReCaptcha\RequestMethod;
  28.  
  29. use ReCaptcha\RequestMethod;
  30. use ReCaptcha\RequestParameters;
  31.  
  32. /**
  33.  * Sends cURL request to the reCAPTCHA service.
  34.  * Note: this requires the cURL extension to be enabled in PHP
  35.  * @see http://php.net/manual/en/book.curl.php
  36.  */
  37. class CurlPost implements RequestMethod
  38. {
  39.     /**
  40.      * URL to which requests are sent via cURL.
  41.      * @const string
  42.      */
  43.     const SITE_VERIFY_URL = 'https://www.google.com/recaptcha/api/siteverify';
  44.  
  45.     /**
  46.      * Curl connection to the reCAPTCHA service
  47.      * @var Curl
  48.      */
  49.     private $curl;
  50.  
  51.     public function __construct(Curl $curl = null)
  52.     {
  53.         if (!is_null($curl)) {
  54.             $this->curl = $curl;
  55.         } else {
  56.             $this->curl = new Curl();
  57.         }
  58.     }
  59.  
  60.     /**
  61.      * Submit the cURL request with the specified parameters.
  62.      *
  63.      * @param RequestParameters $params Request parameters
  64.      * @return string Body of the reCAPTCHA response
  65.      */
  66.     public function submit(RequestParameters $params)
  67.     {
  68.         $handle = $this->curl->init(self::SITE_VERIFY_URL);
  69.  
  70.         $options = array(
  71.             CURLOPT_POST => true,
  72.             CURLOPT_POSTFIELDS => $params->toQueryString(),
  73.             CURLOPT_HTTPHEADER => array(
  74.                 'Content-Type: application/x-www-form-urlencoded'
  75.             ),
  76.             CURLINFO_HEADER_OUT => false,
  77.             CURLOPT_HEADER => false,
  78.             CURLOPT_RETURNTRANSFER => true,
  79.             CURLOPT_SSL_VERIFYPEER => true
  80.         );
  81.         $this->curl->setoptArray($handle, $options);
  82.  
  83.         $response = $this->curl->exec($handle);
  84.         $this->curl->close($handle);
  85.  
  86.         return $response;
  87.     }
  88. }
  89.