Jamm\Memory\MemcacheObject::del_old PHP Метод

    public function del_old()
    {
        $this->acquire_key($this->ttl_table_name, $auto_unlocker);
        $ttl_table = $this->read_TTL_table();
        if (empty($ttl_table)) {
            return true;
        }
        $t = time();
        $changed = false;
        foreach ($ttl_table as $key => $ttl) {
            if ($ttl !== 0 && $ttl < $t) {
                $this->memcache->delete($this->prefix . $key);
                unset($ttl_table[$key]);
                $changed = true;
            }
        }
        if ($changed) {
            $this->memcache->set($this->ttl_table_name, $ttl_table, null, 0);
        }
        return true;
    }