无法使用REDIS

public function __construct($config = array()){
            self::$redis = new \Redis();
            self::$redis->pconnect($config,$config);
      }
        return self::$redis;
    }

$config = array(
    'host'=>'127.0.0.1',
    'port'=>6379,
    'timeout'=>1,
    'database'=>0
);
$redis = new Redis\Redis($config);