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   1  <?php
   2  
   3  /*
   4   * This file is part of the symfony package.
   5   * (c) 2004-2006 Fabien Potencier <fabien.potencier@symfony-project.com>
   6   * 
   7   * For the full copyright and license information, please view the LICENSE
   8   * file that was distributed with this source code.
   9   */
  10  
  11  /**
  12   * CacheHelper.
  13   *
  14   * @package    symfony
  15   * @subpackage helper
  16   * @author     Fabien Potencier <fabien.potencier@symfony-project.com>
  17   * @version    SVN: $Id: CacheHelper.php 2459 2006-10-20 08:15:03Z fabien $
  18   */
  19  
  20  /* Usage
  21  
  22  <?php if (!cache('name')): ?>
  23  
  24  ... HTML ...
  25  
  26    <?php cache_save() ?>
  27  <?php endif; ?>
  28  
  29  */
  30  function cache($name, $lifeTime = 86400)
  31  {
  32    $context = sfContext::getInstance();
  33  
  34    if (!sfConfig::get('sf_cache'))
  35    {
  36      return null;
  37    }
  38  
  39    $request = $context->getRequest();
  40    $cache   = $context->getViewCacheManager();
  41  
  42    if ($request->getAttribute('cache_started') !== null)
  43    {
  44      throw new sfCacheException('Cache already started');
  45    }
  46  
  47    $data = $cache->start($name, $lifeTime);
  48  
  49    if ($data === null)
  50    {
  51      $request->setAttribute('started', 1, 'symfony/action/sfAction/cache');
  52      $request->setAttribute('current_name', $name, 'symfony/action/sfAction/cache');
  53  
  54      return 0;
  55    }
  56    else
  57    {
  58      echo $data;
  59  
  60      return 1;
  61    }
  62  }
  63  
  64  function cache_save()
  65  {
  66    $context = sfContext::getInstance();
  67  
  68    if (!sfConfig::get('sf_cache'))
  69    {
  70      return null;
  71    }
  72  
  73    $request = $context->getRequest();
  74  
  75    if ($request->getAttribute('started', null, 'symfony/action/sfAction/cache') === null)
  76    {
  77      throw new sfCacheException('Cache not started');
  78    }
  79  
  80    $name = $request->getAttribute('current_name', '', 'symfony/action/sfAction/cache');
  81  
  82    $data = $context->getViewCacheManager()->stop($name);
  83  
  84    $request->setAttribute('started', null, 'symfony/action/sfAction/cache');
  85    $request->setAttribute('current_name', null, 'symfony/action/sfAction/cache');
  86  
  87    echo $data;
  88  }