Source for file core.write_cache_file.php
Documentation is available at core.write_cache_file.php
* Prepend the cache information to the cache file
* @param string $tpl_file
* @param string $cache_id
* @param string $compile_id
// $tpl_file, $cache_id, $compile_id, $results
// put timestamp in cache header
$smarty->_cache_info['timestamp'] = time();
if ($smarty->cache_lifetime > - 1){
$smarty->_cache_info['expires'] = $smarty->_cache_info['timestamp'] + $smarty->cache_lifetime;
// cache will never expire
$smarty->_cache_info['expires'] = - 1;
// collapse {nocache...}-tags
$params['results'] = preg_replace('!((\{nocache\:([0-9a-f]{32})#(\d+)\})'
. '{/nocache\:\\3#\\4\})!Us'
$smarty->_cache_info['cache_serials'] = $smarty->_cache_serials;
// prepend the cache header info into cache file
$params['results'] = serialize($smarty->_cache_info). "\n". $params['results'];
if (!empty($smarty->cache_handler_func)) {
// use cache_handler function
array('write', &$smarty, &$params['results'], $params['tpl_file'], $params['cache_id'], $params['compile_id'], null));
// cache_dir not writable, see if it exists
if(!@is_dir($smarty->cache_dir)) {
$smarty->trigger_error('the $cache_dir \'' . $smarty->cache_dir . '\' does not exist, or is not a directory.', E_USER_ERROR);
$smarty->trigger_error('unable to write to $cache_dir \'' . realpath($smarty->cache_dir) . '\'. Be sure $cache_dir is writable by the web server user.', E_USER_ERROR);
$_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 = array('filename' => $_cache_file, 'contents' => $params['results'], 'create_dirs' => true);
require_once(SMARTY_DIR . 'core' . DIRECTORY_SEPARATOR . 'core.write_file.php');
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