Redis案例——商品秒杀，购物车

 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     }