Redis案例——商品秒杀，购物车

秒杀案例：

 <?php

     header("content-type:text/html;charset=utf-8");

     $redis = new redis();

     $result = $redis->connect('10.10.10.119', 6379);

     $mywatchkey = $redis->get("mywatchkey");

     $rob_total = 100;   //抢购数量

     if($mywatchkey<$rob_total){

         $redis->watch("mywatchkey");

         $redis->multi();

         //设置延迟，方便测试效果。

         sleep(5);

         //插入抢购数据

         $redis->hSet("mywatchlist","user_id_".mt_rand(1, 9999),time());

         $redis->set("mywatchkey",$mywatchkey+1);

         $rob_result = $redis->exec();

         if($rob_result){

             $mywatchlist = $redis->hGetAll("mywatchlist");

             echo "抢购成功！<br/>";

             echo "剩余数量：".($rob_total-$mywatchkey-1)."<br/>";

             echo "用户列表：<pre>";

             var_dump($mywatchlist);

         }else{

             echo "手气不好，再抢购！";exit;

         }

     }