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=new mysqli(\"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(\"select cash from account where name=\'userA\'\"); while($row=$result->fetch_assoc()) { $value=$row[\"cash\"]; echo $value; } $mysqli->autocommit(0); if($value>=$price){ $result=$mysqli->query(\"UPDATE account set cash=cash-$price where name=\'userA\'\"); }else { echo \'余额不足\'; exit(); } if(!$result or $mysqli->affected_rows!=1) { $success=FALSE; } $result=$mysqli->query(\"UPDATE account set cash=cash+$price where name=\'userB\'\"); if(!result or $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=\"select cash from account where name=?\"; $stmt=$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:
create table account{ userID smallint unsigned not null auto_increment, name varchar(45) not null, cash decimal(9,2) not null, primary key(userID) )type=InnoDB; insert into account(name,cash) values (\'userA\',\'2000\'); insert into account(name,cash) values (\'userB\',\'10000\');
希望本文所述对大家的php程序设计有所帮助。
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