Source for file core.read_cache_file.php
Documentation is available at core.read_cache_file.php
* read a cache file, determine if it needs to be
* @param string $tpl_file
* @param string $cache_id
* @param string $compile_id
// $tpl_file, $cache_id, $compile_id, &$results
static $content_cache = array();
if ($smarty->force_compile) {
// force compile enabled, always regenerate
if (isset ($content_cache[$params['tpl_file']. ','. $params['cache_id']. ','. $params['compile_id']])) {
list ($params['results'], $smarty->_cache_info) = $content_cache[$params['tpl_file']. ','. $params['cache_id']. ','. $params['compile_id']];
if (!empty($smarty->cache_handler_func)) {
// use cache_handler function
array('read', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
$_auto_id = $smarty->_get_auto_id($params['cache_id'], $params['compile_id']);
$_cache_file = $smarty->_get_auto_filename($smarty->cache_dir, $params['tpl_file'], $_auto_id);
$params['results'] = $smarty->_read_file($_cache_file);
if (empty($params['results'])) {
// nothing to parse (error?), regenerate cache
$cache_split = explode("\n", $params['results'], 2);
$cache_header = $cache_split[0];
if ($smarty->caching == 2 && isset ($_cache_info['expires'])){
// caching by expiration time
if ($_cache_info['expires'] > - 1 && (time() > $_cache_info['expires'])) {
// cache expired, regenerate
if ($smarty->cache_lifetime > - 1 && (time() - $_cache_info['timestamp'] > $smarty->cache_lifetime)) {
// cache expired, regenerate
if ($smarty->compile_check) {
$_params = array('get_source' => false, 'quiet'=> true);
foreach (array_keys($_cache_info['template']) as $_template_dep) {
$_params['resource_name'] = $_template_dep;
if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
// template file has changed, regenerate cache
if (isset ($_cache_info['config'])) {
$_params = array('resource_base_path' => $smarty->config_dir, 'get_source' => false, 'quiet'=> true);
foreach (array_keys($_cache_info['config']) as $_config_dep) {
$_params['resource_name'] = $_config_dep;
if (!$smarty->_fetch_resource_info($_params) || $_cache_info['timestamp'] < $_params['resource_timestamp']) {
// config file has changed, regenerate cache
foreach ($_cache_info['cache_serials'] as $_include_file_path=> $_cache_serial) {
if (empty($smarty->_cache_serials[$_include_file_path])) {
$smarty->_include($_include_file_path, true);
if ($smarty->_cache_serials[$_include_file_path] != $_cache_serial) {
$params['results'] = $cache_split[1];
$content_cache[$params['tpl_file']. ','. $params['cache_id']. ','. $params['compile_id']] = array($params['results'], $_cache_info);
$smarty->_cache_info = $_cache_info;
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