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   1  <?php
   2  /**
   3  *
   4  * This file is part of the phpBB Forum Software package.
   5  *
   6  * @copyright (c) phpBB Limited <https://www.phpbb.com>
   7  * @license GNU General Public License, version 2 (GPL-2.0)
   8  *
   9  * For full copyright and license information, please see
  10  * the docs/CREDITS.txt file.
  11  *
  12  */
  13  
  14  namespace phpbb\cache\driver;
  15  
  16  if (!defined('PHPBB_ACM_MEMCACHE_PORT'))
  17  {
  18      define('PHPBB_ACM_MEMCACHE_PORT', 11211);
  19  }
  20  
  21  if (!defined('PHPBB_ACM_MEMCACHE_COMPRESS'))
  22  {
  23      define('PHPBB_ACM_MEMCACHE_COMPRESS', false);
  24  }
  25  
  26  if (!defined('PHPBB_ACM_MEMCACHE_HOST'))
  27  {
  28      define('PHPBB_ACM_MEMCACHE_HOST', 'localhost');
  29  }
  30  
  31  if (!defined('PHPBB_ACM_MEMCACHE'))
  32  {
  33      //can define multiple servers with host1/port1,host2/port2 format
  34      define('PHPBB_ACM_MEMCACHE', PHPBB_ACM_MEMCACHE_HOST . '/' . PHPBB_ACM_MEMCACHE_PORT);
  35  }
  36  
  37  /**
  38  * ACM for Memcached
  39  */
  40  class memcache extends \phpbb\cache\driver\memory
  41  {
  42      var $extension = 'memcache';
  43  
  44      var $memcache;
  45      var $flags = 0;
  46  
  47  	function __construct()
  48      {
  49          // Call the parent constructor
  50          parent::__construct();
  51  
  52          $this->memcache = new \Memcache;
  53          foreach (explode(',', PHPBB_ACM_MEMCACHE) as $u)
  54          {
  55              preg_match('#(.*)/(\d+)#', $u, $parts);
  56              $this->memcache->addServer(trim($parts[1]), (int) trim($parts[2]));
  57          }
  58          $this->flags = (PHPBB_ACM_MEMCACHE_COMPRESS) ? MEMCACHE_COMPRESSED : 0;
  59      }
  60  
  61      /**
  62      * {@inheritDoc}
  63      */
  64  	function unload()
  65      {
  66          parent::unload();
  67  
  68          $this->memcache->close();
  69      }
  70  
  71      /**
  72      * {@inheritDoc}
  73      */
  74  	function purge()
  75      {
  76          $this->memcache->flush();
  77  
  78          parent::purge();
  79      }
  80  
  81      /**
  82      * Fetch an item from the cache
  83      *
  84      * @access protected
  85      * @param string $var Cache key
  86      * @return mixed Cached data
  87      */
  88  	function _read($var)
  89      {
  90          return $this->memcache->get($this->key_prefix . $var);
  91      }
  92  
  93      /**
  94      * Store data in the cache
  95      *
  96      * @access protected
  97      * @param string $var Cache key
  98      * @param mixed $data Data to store
  99      * @param int $ttl Time-to-live of cached data
 100      * @return bool True if the operation succeeded
 101      */
 102  	function _write($var, $data, $ttl = 2592000)
 103      {
 104          if (!$this->memcache->replace($this->key_prefix . $var, $data, $this->flags, $ttl))
 105          {
 106              return $this->memcache->set($this->key_prefix . $var, $data, $this->flags, $ttl);
 107          }
 108          return true;
 109      }
 110  
 111      /**
 112      * Remove an item from the cache
 113      *
 114      * @access protected
 115      * @param string $var Cache key
 116      * @return bool True if the operation succeeded
 117      */
 118  	function _delete($var)
 119      {
 120          return $this->memcache->delete($this->key_prefix . $var);
 121      }
 122  }