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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  }