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。