PHP+Mysql基于事务处理实现转账功能的方法
本文实例讲述了PHP+Mysql基于事务处理实现转账功能的方法。分享给大家供大家参考。具体如下:
<?php header("Content-Type:text/html;charset=utf-8"); $mysqli=newmysqli("localhost","root","","test"); if(mysqli_connect_errno()) { printf("连接失败:%s<br>",mysqli_connect_error()); exit(); } $success=TRUE; $price=8000; $result=$mysqli->query("selectcashfromaccountwherename='userA'"); while($row=$result->fetch_assoc()) { $value=$row["cash"]; echo$value; } $mysqli->autocommit(0); if($value>=$price){ $result=$mysqli->query("UPDATEaccountsetcash=cash-$pricewherename='userA'"); }else{ echo'余额不足'; exit(); } if(!$resultor$mysqli->affected_rows!=1) { $success=FALSE; } $result=$mysqli->query("UPDATEaccountsetcash=cash+$pricewherename='userB'"); if(!resultor$mysqli->affected_rows!=1){ $success=FALSE; } if($success) { $mysqli->commit(); echo'转账成功!'; }else { $mysqli->rollback(); echo"转账失败!"; } $mysqli->autocommit(1); $query="selectcashfromaccountwherename=?"; $stmt=$mysqli->prepare($query); $stmt->bind_param('s',$name); $name='userA'; $stmt->execute(); $stmt->store_result(); $stmt->bind_result($cash); while($stmt->fetch()) echo"用户userA的值为:".$cash; $mysqli->close(); ?>
数据库SQL语句如下:
createtableaccount{ userIDsmallintunsignednotnullauto_increment, namevarchar(45)notnull, cashdecimal(9,2)notnull, primarykey(userID) )type=InnoDB; insertintoaccount(name,cash)values('userA','2000'); insertintoaccount(name,cash)values('userB','10000');
希望本文所述对大家的php程序设计有所帮助。