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=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。