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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * 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 license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Version
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * Class to store and retrieve the version of Zend Framework.
  *
  * @category   Zend
  * @package    Zend_Version
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 final class Zend_Version
 {
     /**
      * Zend Framework version identification - see compareVersion()
      */
     const VERSION = '1.12.20';
 
     /**
      * The latest stable version Zend Framework available
      *
      * @var string
      */
     protected static $_latestVersion;
 
     /**
      * Compare the specified Zend Framework version string $version
      * with the current Zend_Version::VERSION of Zend Framework.
      *
      * @param  string  $version  A version string (e.g. "0.7.1").
      * @return int           -1 if the $version is older,
      *                           0 if they are the same,
      *                           and +1 if $version is newer.
      *
      */
     public static function compareVersion($version)
     {
         $version = strtolower($version);
         $version = preg_replace('/(\d)pr(\d?)/', '$1a$2', $version);
         return version_compare($version, strtolower(self::VERSION));
     }
 
     /**
      * Fetches the version of the latest stable release
      *
      * @link http://framework.zend.com/download/latest
      * @return string
      */
     public static function getLatest()
     {
         if (null === self::$_latestVersion) {
             self::$_latestVersion = 'not available';
 
             $handle = fopen('http://framework.zend.com/api/zf-version', 'r');
             if (false !== $handle) {
                 self::$_latestVersion = stream_get_contents($handle);
                 fclose($handle);
             }
         }
 
         return self::$_latestVersion;
     }
 }