mysql事务处理

 1 <?php
 2       
 3        $mysqli=new MySQLi("localhost","root","hsp123","test");
 4        if($mysqli->connect_error){
 5               
 6               die($mysqli->connect_error);
 7        }
 8       
 9        //将提交设为false[事务一旦提交就没有机会回滚
10        $mysqli->autocommit(false);
11        //-> savepoint a;会把但前情况记录
12        $sql1="update account set balance=balance-2 where id=1";
13        $sql2="update account2 set balance=balance+2 where id=2";
14        $b1=$mysqli->query($sql1) ;
15        $b2=$mysqli->query($sql2) ;
16       
17        if(!$b1||!$b2){
18               echo "失败,回滚".$mysqli->error;
19               //回滚!
20               $mysqli->rollback();
21        }else{
22               //提交[一旦提交没有机会回滚
23               $mysqli->commit();
24        }
25        $mysqli->close();
26        //显示控制台
27 ?>