


PHP+mysqli transaction control to implement bank transfer example, mysqli bank transfer_PHP tutorial
php+mysqli事务控制实现银行转账实例,mysqli银行转账
本文实例讲述了php+mysqli事务控制实现银行转账的方法。分享给大家供大家参考。具体分析如下:
事务控制,也就是说所有的语句执行成功后,才会提交。否则,如果前面有语句执行成功,而后面没有执行成功,则回滚到执行之前的状态。通过银行转账的案例来说明这个应用。一个账号转了钱出去,另一个账号必须有钱转入,这样才算成功。
代码如下:
<?php //1、创建数据库连接对象 $mysqli = new MySQLi("localhost","root","123456","liuyan"); if($mysqli->connect_error){ die($mysqli->connect_error); } $mysqli->query("set names 'GBK'"); $mysqli->autocommit(false); //首先设置autocommit为false,也就是不自动提交 $sql1 = "update account set balance=balance-2 where id=1;"; $sql2 = "update account set balance=balance+2 where id=2;"; $res1 =$mysqli->query($sql1) or die($mysqli->error); $res2 =$mysqli->query($sql2) or die($mysqli->error); if(!$res1 || !$res2){ echo "转账失败"; $mysqli->rollback();//如果有一条不成功,则回滚 }else{ $mysqli->commit();//两条语句都执行成功,则提交 echo "转账成功"; } ?>
希望本文所述对大家的php程序设计有所帮助。

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