redis緩存商品列表

        $redis = new Redis();
        $redis ->connect('127.0.0.1',6379);
        $data = $redis->get('goods_cache');
        if($data){
            echo 'get data from redis<br>';
            $data = json_decode($data,true);
        }else{
            echo 'get data from mysql<br>';
            $data = pdo_fetchall("select id, title from ".tablename('ewei_shop_goods')." where status=1 limit 6");
            $redis->set('goods_cache',json_encode($data));
            $redis->expire('goods_cache',5);//設置緩存時長5秒
        }

        var_dump($data);