interface/modules/zend_modules/library/Zend/Session/Validator/HttpUserAgent.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Session\Validator;
  11
  12 class HttpUserAgent implements ValidatorInterface
  13 {
  14     /**
  15      * Internal data
  16      *
  17      * @var string
  18      */
  19     protected $data;
  20
  21     /**
  22      * Constructor
  23      * get the current user agent and store it in the session as 'valid data'
  24      *
  25      * @param string|null $data
  26      */
  27     public function __construct($data = null)
  28     {
  29         if (empty($data)) {
  30             $data = isset($_SERVER['HTTP_USER_AGENT'])
  31                   ? $_SERVER['HTTP_USER_AGENT']
  32                   : null;
  33         }
  34         $this->data = $data;
  35     }
  36
  37     /**
  38      * isValid() - this method will determine if the current user agent matches the
  39      * user agent we stored when we initialized this variable.
  40      *
  41      * @return bool
  42      */
  43     public function isValid()
  44     {
  45         $userAgent = isset($_SERVER['HTTP_USER_AGENT'])
  46                    ? $_SERVER['HTTP_USER_AGENT']
  47                    : null;
  48
  49         return ($userAgent === $this->getData());
  50     }
  51
  52     /**
  53      * Retrieve token for validating call
  54      *
  55      * @return string
  56      */
  57     public function getData()
  58     {
  59         return $this->data;
  60     }
  61
  62     /**
  63      * Return validator name
  64      *
  65      * @return string
  66      */
  67     public function getName()
  68     {
  69         return __CLASS__;
  70     }
  71 }