library/core/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 ?>