redis事务处理抢购简单代码（已验证）

<?php

header("content-type:text/html;charset=utf-8");$redis = new redis();$redis->connect('127.0.0.1', 6379);$watchKey = "mywatchkey8";$listKey = "mywatchlist11";$mywatchkey = $redis->get($watchKey);$rob_total = 100;   //抢购数量if($mywatchkey<$rob_total){   $redis->watch($watchKey);   $redis->multi();   //插入抢购数据   $id = "user_id_".mt_rand(100000, 900000);   $redis->hSet($listKey,$id,time());   $res = $redis->incr($watchKey,1);   if($res<$rob_total){      $rob_result = $redis->exec();      if($rob_result) {         $mywatchlist = $redis->hGetAll($listKey);         echo "抢购成功！<br/>";         echo "剩余数量：".($rob_total-$mywatchkey-1)."<br/>";         echo "用户列表：<pre>";         file_put_contents('1.txt', "success: ".$id . "|{$res}\r\n", FILE_APPEND);         var_dump($mywatchlist);      }      else {         file_put_contents('1.txt', "fail22: ".$id . "|{$res}\r\n", FILE_APPEND);         echo "手气不好，再抢购！";exit;      }   }else{      $redis->discard();      file_put_contents('1.txt', "fail11: ".$id . "|{$res}\r\n", FILE_APPEND);      echo "手气不好，再抢购！";exit;   }};$mywatchlist = $redis->hGetAll("mywatchlist11");var_dump($mywatchlist);die;

用Apache ab测试，Server Software:        Apache/2.2.21Server Hostname:        booknew.2345.comServer Port:            80Document Path:          /index.php?c=loginDocument Length:        27 bytesConcurrency Level:      200Time taken for tests:   39.597 secondsComplete requests:      1500Failed requests:        737   (Connect: 0, Receive: 0, Length: 737, Exceptions: 0)Write errors:           0Total transferred:      15350876 bytesHTML transferred:       15065616 bytesRequests per second:    37.88 [#/sec] (mean)Time per request:       5279.626 [ms] (mean)Time per request:       26.398 [ms] (mean, across all concurrent requests)Transfer rate:          378.59 [Kbytes/sec] receivedConnection Times (ms)              min  mean[+/-sd] median   maxConnect:        0    0   2.5      0      63Processing:   641 4985 913.2   5094    5930Waiting:      641 4980 912.9   5094    5844Total:        641 4986 913.2   5094    5930Percentage of the requests served within a certain time (ms)  50%   5094  66%   5353  75%   5522  80%   5596  90%   5719  95%   5756  98%   5788  99%   5876 100%   5930 (longest request)

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