/**
* Empty out the cache in use as best it can
*
* It may only remove the files of a certain type (if the $type parameter is given)
* Type can be user, data or left blank
* - user clears out user data
* - data clears out system / opcode data
* - If no type is specified will perfom a complete cache clearing
* For cache engines that do not distinguish on types, a full cache flush will be done
*
* @param string $type = ''
*/
function clean_cache($type = '')
{
global $cache_accelerator, $cache_uid, $cache_password, $cache_memcached, $memcached;
switch ($cache_accelerator) {
case 'memcached':
if ((function_exists('memcache_flush') || function_exists('memcached_flush')) && !empty($cache_memcached)) {
// Not connected yet?
if (empty($memcached)) {
get_memcached_server();
}
if (!$memcached) {
return;
}
// Clear it out, really invalidate whats there
if (function_exists('memcache_flush')) {
memcache_flush($memcached);
} else {
memcached_flush($memcached);
}
}
break;
case 'eaccelerator':
if (function_exists('eaccelerator_clear') && function_exists('eaccelerator_clean')) {
// Clean out the already expired items
@eaccelerator_clean();
// Remove all unused scripts and data from shared memory and disk cache,
// e.g. all data that isn't used in the current requests.
@eaccelerator_clear();
}
case 'mmcache':
if (function_exists('mmcache_gc')) {
// Removes all expired keys from shared memory, this is not a complete cache flush :(
// @todo there is no clear function, should we try to find all of the keys and delete those? with mmcache_rm
mmcache_gc();
}
break;
case 'apc':
case 'apcu':
if (function_exists('apc_clear_cache')) {
// If passed a type, clear that type out
if ($type === '' || $type === 'data') {
apc_clear_cache('user');
apc_clear_cache('system');
} elseif ($type === 'user') {
apc_clear_cache('user');
}
}
break;
case 'zend':
if (function_exists('zend_shm_cache_clear')) {
zend_shm_cache_clear('ELK');
}
break;
case 'xcache':
if (function_exists('xcache_clear_cache') && function_exists('xcache_count')) {
// Xcache may need auth credentials, depending on how its been set up
if (!empty($cache_uid) && !empty($cache_password)) {
$_SERVER['PHP_AUTH_USER'] = $cache_uid;
$_SERVER['PHP_AUTH_PW'] = $cache_password;
}
// Get the counts so we clear each instance
$pcnt = xcache_count(XC_TYPE_PHP);
$vcnt = xcache_count(XC_TYPE_VAR);
// Time to clear the user vars and/or the opcache
if ($type === '' || $type === 'user') {
for ($i = 0; $i < $vcnt; $i++) {
xcache_clear_cache(XC_TYPE_VAR, $i);
}
}
if ($type === '' || $type === 'data') {
for ($i = 0; $i < $pcnt; $i++) {
xcache_clear_cache(XC_TYPE_PHP, $i);
}
}
}
break;
}
// To be complete, we also clear out the cache dir so we get any js/css hive files
if (is_dir(CACHEDIR)) {
// Remove the cache files in our disk cache directory
$dh = opendir(CACHEDIR);
while ($file = readdir($dh)) {
if ($file != '.' && $file != '..' && $file != 'index.php' && $file != '.htaccess' && (!$type || substr($file, 0, strlen($type)) == $type)) {
@unlink(CACHEDIR . '/' . $file);
}
}
closedir($dh);
}
// Invalidate cache, to be sure!
// ... as long as Load.php can be modified, anyway.
@touch(SOURCEDIR . '/Load.php');
// Give addons a way to trigger cache cleaning.
call_integration_hook('integrate_clean_cache');
clearstatcache();
}
function pmxCacheClean()
{
// connected?
if (empty($mcache)) {
connect_mcache();
}
if ($mcache) {
// clear it out
if (function_exists('memcache_flush')) {
memcache_flush($memcached);
} else {
memcached_flush($memcached);
}
}
// clear SMF settings cache
cache_put_data('modSettings', null, 90);
}
