public function read($key)
    {
        if ($value = $this->redis->get($key)) {
            $arr = unserialize($value);
            $this->changed = $arr['changed'];
            $this->ip      = $arr['ip'];
            $this->vars    = $arr['vars'];
            $this->key     = $key;

            return !empty($this->vars) ? (string) $this->vars : '';
        }

        return '';
    }