Doctrine\Common\Cache\RedisCache::setRedis PHP Method

    public function setRedis(Redis $redis)
    {
        $redis->setOption(Redis::OPT_SERIALIZER, $this->getSerializerValue());
        $this->redis = $redis;
    }

 public function __construct($host = '127.0.0.1')
 {
     $redis = new Redis();
     $redis->connect($host);
     $this->redis_cache = new DoctrineRedisCache();
     $this->redis_cache->setRedis($redis);
 }