PHP Decode

<?php
/*
* 2007-2017 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to [email protected] so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <[email protected]>
*  @copyright  2007-2017 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_ADMIN_DIR_')) {
    define('_PS_ADMIN_DIR_', getcwd());
}
require_once(_PS_ADMIN_DIR_.'/../config/config.inc.php');
require_once(_PS_ADMIN_DIR_.'/init.php');

if (isset($_GET['img']) and Validate::isMd5($_GET['img']) and isset($_GET['name']) and Validate::isGenericName($_GET['name']) and file_exists(_PS_UPLOAD_DIR_.$_GET['img'])) {
    header('Content-type: image/jpeg');
    header('Content-Disposition: attachment; filename="'.$_GET['name'].'.jpg"');
    echo file_get_contents(_PS_UPLOAD_DIR_.$_GET['img']);
}
 ?>