Redis案例——商品秒杀，购物车

秒杀案例：

 1 <?php
 2     header("content-type:text/html;charset=utf-8");
 3     $redis = new redis();
 4     $result = $redis->connect(‘10.10.10.119‘, 6379);
 5     $mywatchkey = $redis->get("mywatchkey");
 6     $rob_total = 100;   //抢购数量
 7     if($mywatchkey<$rob_total){
 8         $redis->watch("mywatchkey");
 9         $redis->multi();
10         //设置延迟，方便测试效果。
11         sleep(5);
12         //插入抢购数据
13         $redis->hSet("mywatchlist","user_id_".mt_rand(1, 9999),time());
14         $redis->set("mywatchkey",$mywatchkey+1);
15         $rob_result = $redis->exec();
16         if($rob_result){
17             $mywatchlist = $redis->hGetAll("mywatchlist");
18             echo "抢购成功！<br/>";
19             echo "剩余数量：".($rob_total-$mywatchkey-1)."<br/>";
20             echo "用户列表：<pre>";
21             var_dump($mywatchlist);
22         }else{
23             echo "手气不好，再抢购！";exit;
24         }
25     }