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<?php
/**
* Smarty Extension Clear
*
* $smarty->clear() method file cache file resource
*
* @package Smarty
* @subpackage PluginsInternal
* @author Uwe Tews
*/
class Smarty_Internal_Extension_Clear
{
/**
* Empty cache for a specific template
*
* @param Smarty $smarty
* @param string $resource_name template name
* @param string $cache_id cache id
* @param string $compile_id compile id
* @param integer $exp_time expiration time (number of seconds, not timestamp)
*
* @return integer number of cache files deleted
*/
public static function clear(Smarty $smarty, $resource_name, $cache_id, $compile_id, $exp_time)
{
$_cache_id = isset($cache_id) ? preg_replace('![^\w\|]+!', '_', $cache_id) : null;
$_compile_id = isset($compile_id) ? preg_replace('![^\w]+!', '_', $compile_id) : null;
$_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
$_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
$_dir = $smarty->getCacheDir();
if ($_dir == '/') { //We should never want to delete this!
return 0;
}
$_dir_length = strlen($_dir);
if (isset($_cache_id)) {
$_cache_id_parts = explode('|', $_cache_id);
$_cache_id_parts_count = count($_cache_id_parts);
if ($smarty->use_sub_dirs) {
foreach ($_cache_id_parts as $id_part) {
$_dir .= $id_part . DS;
}
}
}
if (isset($resource_name)) {
$_save_stat = $smarty->caching;
$smarty->caching = true;
$tpl = new $smarty->template_class($resource_name, $smarty);
$smarty->caching = $_save_stat;
// remove from template cache
$tpl->source; // have the template registered before unset()
if ($tpl->source->exists) {
$_resourcename_parts = basename(str_replace('^', '/', $tpl->cached->filepath));
} else {
return 0;
}
}
$_count = 0;
$_time = time();
if (file_exists($_dir)) {
$_cacheDirs = new RecursiveDirectoryIterator($_dir);
$_cache = new RecursiveIteratorIterator($_cacheDirs, RecursiveIteratorIterator::CHILD_FIRST);
foreach ($_cache as $_file) {
if (substr(basename($_file->getPathname()), 0, 1) == '.' || strpos($_file, '.svn') !== false) {
continue;
}
// directory ?
if ($_file->isDir()) {
if (!$_cache->isDot()) {
// delete folder if empty
@rmdir($_file->getPathname());
}
} else {
$_parts = explode($_dir_sep, str_replace('\\', '/', substr((string) $_file, $_dir_length)));
$_parts_count = count($_parts);
// check name
if (isset($resource_name)) {
if ($_parts[$_parts_count - 1] != $_resourcename_parts) {
continue;
}
}
// check compile id
if (isset($_compile_id) && (!isset($_parts[$_parts_count - 2 - $_compile_id_offset]) ||
$_parts[$_parts_count - 2 - $_compile_id_offset] != $_compile_id)
) {
continue;
}
// check cache id
if (isset($_cache_id)) {
// count of cache id parts
$_parts_count = (isset($_compile_id)) ? $_parts_count - 2 - $_compile_id_offset :
$_parts_count - 1 - $_compile_id_offset;
if ($_parts_count < $_cache_id_parts_count) {
continue;
}
for ($i = 0; $i < $_cache_id_parts_count; $i ++) {
if ($_parts[$i] != $_cache_id_parts[$i]) {
continue 2;
}
}
}
// expired ?
if (isset($exp_time)) {
if ($exp_time < 0) {
preg_match('#\'cache_lifetime\' =>\s*(\d*)#', file_get_contents($_file), $match);
if ($_time < (@filemtime($_file) + $match[1])) {
continue;
}
} else {
if ($_time - @filemtime($_file) < $exp_time) {
continue;
}
}
}
// remove from template cache
if (isset($smarty->_cache['template_objects'])) {
foreach ($smarty->_cache['template_objects'] as $key => $tpl) {
if (isset($tpl->cached) && $tpl->cached->filepath == (string) $_file) {
unset($smarty->_cache['template_objects'][$key]);
}
}
}
$_count += @unlink((string) $_file) ? 1 : 0;
if (function_exists('opcache_invalidate')) {
opcache_invalidate((string) $_file);
}
}
}
}
return $_count;
}
}
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