1 <?php
2 $id = 1;
3 $pdo=new PDO("mysql:host=127.0.0.1;dbname=test","root","root");
4 $pdo->exec("UPDATE `ms_goods` SET `nums`=`nums`-1 WHERE id=$id ");
5 echo "miao sha success";
6 // 队列 链表 list :array
7 // array:先进后出
8 // list: 先进先出
9 ?>
1 <?php
2 // 库存复数 : 并发量足够大
3 $r=new Redis();
4
5 $r->connect("127.0.0.1",6379);
6
7 $res=$r->rpop("mslist"); //right 右:出队 --->
8
9 if(!$res){
10 echo "out of print";
11 }else{
12 $id = 1;
13 $pdo=new PDO("mysql:host=127.0.0.1;dbname=test","root","root");
14 $pdo->exec("UPDATE `ms_goods` SET `nums`=`nums`-1 WHERE id=$id ");
15 echo "miao sha success";
16 }
17
18 // 队列 链表 list :array
19 // array:先进后出
20 // list: 先进先出
21 ?>
1 <?php
2 $id = 1; // 活动id
3 $pdo=new PDO("mysql:host=127.0.0.1;dbname=test","root","root");
4 $num = $pdo->query("SELECT * FROM `ms_goods` WHERE id = $id ")->fetch();
5 $nums = $num['nums']; //库存
6
7 // 库存复数 : 并发量足够大
8 $r=new Redis();
9
10 $r->connect("127.0.0.1",6379);
11
12 for($i=1;$i<=$nums;$i++){
13 $r->lpush("mslist","$i"); //left 左:入队 ---->
14 }
15
16 echo "[nums:{$nums}] list: miaosha start ...";
17 ?>
1 <?php
2 $id = 1;
3 $pdo=new PDO("mysql:host=127.0.0.1;dbname=test","root","root");
4 $res=$pdo->query("SELECT * FROM `ms_goods` where id = $id")->fetch(PDO::FETCH_ASSOC);
5 ?>
6
7 <!DOCTYPE html>
8 <html lang="en">
9 <head>
10 <meta charset="UTF-8">
11 <title>秒杀功能</title>
12 </head>
13 <body>
14
15 <center>
16 <h1>抢购活动,热卖,促销</h1>
17 <div style="width:320px;height:160px;border:1px solid #ccc;">
18 <img src="tel_5.jpg" />
19 </div>
20 <p>库存:<?php echo $res['nums']; ?></p>
21 <button id="msbtn">秒杀</button>
22 </center>
23
24 </body>
25 </html>
26
27 <script type="text/javascript">
28 document.getElementById('msbtn').onclick=function(){
29 window.location.href = 'doms.php';
30 }
31 </script>