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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  /**
  17  * ACM Null Caching
  18  */
  19  class null extends \phpbb\cache\driver\base
  20  {
  21      /**
  22      * Set cache path
  23      */
  24  	function __construct()
  25      {
  26      }
  27  
  28      /**
  29      * {@inheritDoc}
  30      */
  31  	function load()
  32      {
  33          return true;
  34      }
  35  
  36      /**
  37      * {@inheritDoc}
  38      */
  39  	function unload()
  40      {
  41      }
  42  
  43      /**
  44      * {@inheritDoc}
  45      */
  46  	function save()
  47      {
  48      }
  49  
  50      /**
  51      * {@inheritDoc}
  52      */
  53  	function tidy()
  54      {
  55          // This cache always has a tidy room.
  56          set_config('cache_last_gc', time(), true);
  57      }
  58  
  59      /**
  60      * {@inheritDoc}
  61      */
  62  	function get($var_name)
  63      {
  64          return false;
  65      }
  66  
  67      /**
  68      * {@inheritDoc}
  69      */
  70  	function put($var_name, $var, $ttl = 0)
  71      {
  72      }
  73  
  74      /**
  75      * {@inheritDoc}
  76      */
  77  	function purge()
  78      {
  79      }
  80  
  81      /**
  82      * {@inheritDoc}
  83      */
  84  	function destroy($var_name, $table = '')
  85      {
  86      }
  87  
  88      /**
  89      * {@inheritDoc}
  90      */
  91  	function _exists($var_name)
  92      {
  93          return false;
  94      }
  95  
  96      /**
  97      * {@inheritDoc}
  98      */
  99  	function sql_load($query)
 100      {
 101          return false;
 102      }
 103  
 104      /**
 105      * {@inheritDoc}
 106      */
 107  	function sql_save(\phpbb\db\driver\driver_interface $db, $query, $query_result, $ttl)
 108      {
 109          return $query_result;
 110      }
 111  
 112      /**
 113      * {@inheritDoc}
 114      */
 115  	function sql_exists($query_id)
 116      {
 117          return false;
 118      }
 119  
 120      /**
 121      * {@inheritDoc}
 122      */
 123  	function sql_fetchrow($query_id)
 124      {
 125          return false;
 126      }
 127  
 128      /**
 129      * {@inheritDoc}
 130      */
 131  	function sql_fetchfield($query_id, $field)
 132      {
 133          return false;
 134      }
 135  
 136      /**
 137      * {@inheritDoc}
 138      */
 139  	function sql_rowseek($rownum, $query_id)
 140      {
 141          return false;
 142      }
 143  
 144      /**
 145      * {@inheritDoc}
 146      */
 147  	function sql_freeresult($query_id)
 148      {
 149          return false;
 150      }
 151  }