phprs\util\RedisCache::set PHP Method

    public function set($key, $var, $ttl = null)
    {
        if ($this->serialize) {
            $var = serialize($var);
        }
        if ($ttl === null) {
            $this->getImpl()->set($key, $var);
        } else {
            return $this->getImpl()->setex($key, $ttl, $var);
        }
    }