public function fetch($key, $meta = false, $timestamp = false)
{
if ($this->_session_cache->isCached($key)) {
self::$session_hit_count++;
if (!$this->_file_cache->isCached($key)) {
# sync file with session
$this->_file_cache->save($key, $this->_session_cache->fetch($key));
}
} elseif ($this->_file_cache->isCached($key)) {
self::$file_hit_count++;
# sync session with file
$this->_session_cache->save($key, $this->_file_cache->fetch($key));
} else {
self::$missed_count++;
# no key found
return NULL;
}
# we made sure that the $_SESSION & FILE is synced
return $this->_session_cache->fetch($key, $meta, $timestamp);
}