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Source for file core.read_cache_file.php

Documentation is available at core.read_cache_file.php

  1. <?php
  2. /**
  3.  * Smarty plugin
  4.  * @package Smarty
  5.  * @subpackage plugins
  6.  */
  7.  
  8. /**
  9.  * read a cache file, determine if it needs to be
  10.  * regenerated or not
  11.  *
  12.  * @param string $tpl_file 
  13.  * @param string $cache_id 
  14.  * @param string $compile_id 
  15.  * @param string $results 
  16.  * @return boolean 
  17.  */
  18.  
  19. //  $tpl_file, $cache_id, $compile_id, &$results
  20.  
  21. function smarty_core_read_cache_file(&$params, &$smarty)
  22. {
  23.     static  $content_cache = array();
  24.  
  25.     if ($smarty->force_compile) {
  26.         // force compile enabled, always regenerate
  27.                 return false;
  28.     }
  29.  
  30.     if (isset($content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']])) {
  31.         list($params['results'], $smarty->_cache_info) = $content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']];
  32.         return true;
  33.     }
  34.  
  35.     if (!empty($smarty->cache_handler_func)) {
  36.         // use cache_handler function
  37.                 call_user_func_array($smarty->cache_handler_func,
  38.                              array('read', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
  39.     } else {
  40.         // use local cache file
  41.                 $_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);
  42.         $_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);
  43.         $params['results'] = $smarty->_read_file($_cache_file);
  44.     }
  45.  
  46.     if (empty($params['results'])) {
  47.         // nothing to parse (error?), regenerate cache
  48.                 return false;
  49.     }
  50.  
  51.     $cache_split = explode("\n", $params['results'], 2);
  52.     $cache_header = $cache_split[0];
  53.  
  54.     $_cache_info = unserialize($cache_header);
  55.  
  56.     if ($smarty->caching == 2 && isset ($_cache_info['expires'])){
  57.         // caching by expiration time
  58.                 if ($_cache_info['expires'] > -1 && (time() > $_cache_info['expires'])) {
  59.             // cache expired, regenerate
  60.                         return false;
  61.         }
  62.     } else {
  63.         // caching by lifetime
  64.                 if ($smarty->cache_lifetime > -1 && (time() - $_cache_info['timestamp'] > $smarty->cache_lifetime)) {
  65.             // cache expired, regenerate
  66.                         return false;
  67.         }
  68.     }
  69.  
  70.     if ($smarty->compile_check) {
  71.         $_params = array('get_source' => false, 'quiet'=>true);
  72.         foreach (array_keys($_cache_info['template']) as $_template_dep) {
  73.             $_params['resource_name'] = $_template_dep;
  74.             if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
  75.                 // template file has changed, regenerate cache
  76.                                 return false;
  77.             }
  78.         }
  79.  
  80.         if (isset($_cache_info['config'])) {
  81.             $_params = array('resource_base_path' => $smarty->config_dir, 'get_source' => false, 'quiet'=>true);
  82.             foreach (array_keys($_cache_info['config']) as $_config_dep) {
  83.                 $_params['resource_name'] = $_config_dep;
  84.                 if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
  85.                     // config file has changed, regenerate cache
  86.                                         return false;
  87.                 }
  88.             }
  89.         }
  90.     }
  91.  
  92.     foreach ($_cache_info['cache_serials'] as $_include_file_path=>$_cache_serial) {
  93.         if (empty($smarty->_cache_serials[$_include_file_path])) {
  94.             $smarty->_include($_include_file_path, true);
  95.         }
  96.  
  97.         if ($smarty->_cache_serials[$_include_file_path] != $_cache_serial) {
  98.             /* regenerate */
  99.             return false;
  100.         }
  101.     }
  102.     $params['results'] = $cache_split[1];
  103.     $content_cache[$params['tpl_file'].','.$params['cache_id'].','.$params['compile_id']] = array($params['results'], $_cache_info);
  104.  
  105.     $smarty->_cache_info = $_cache_info;
  106.     return true;
  107. }
  108.  
  109. /* vim: set expandtab: */
  110.  
  111. ?>
Documentation generated on Tue, 24 Oct 2006 09:21:57 -0500 by phpDocumentor 1.3.1