你是否遇到过“重复提交”的问题?要解决这个问题其实并不难。这里有一个简单的方法避免同一表单的重复提交。 首先,我们可以定义一个session变量用来保存一个表单的提交序列号。这里我定义为“$userLastAction”。然后在表单里加入一个hidden变量,把值设为$userLastAction+1: <input type=Hidden name=lastAction value=<? =$userLastAction+1 ?>> 最后,在处理提交之前判断表单是否已被提交过: if($lastAction>$userLastAction and inputIsValid(...)){ $userLastAction++; // 序列号加1 // 处理表单数据 } 原文: Avoid multiple form submissions Submitted By: Douglas E. Cook Date: 07/26/00 19:46 Does your database suffer from "duplicate post" syndrome? The cure isn't too difficult. Here is a simple way to prevent users from submitting the same form multiple times. First, declare a session variable to store a serial number for each form. I call mine "$userLastAction." Then, in every form where duplicate submission is a problem, include a hidden field, and set the value to $userLastAction+1: <INPUT TYPE=HIDDEN NAME=lastAction VALUE=<?= $userLastAction+1 ?>> Finally, verify that the form has not been previously submitted before acting on the submission: if($lastAction>$userLastAction and inputIsValid(...)){ $userLastAction++; // Increment serial number // Act on form here } 译自:phpbuilder
2002-5-30 视点网络工作室
你是否遇到过“重复提交”的问题?要解决这个问题其实并不难。这里有一个简单的方法避免同一表单的重复提交。
首先,我们可以定义一个session变量用来保存一个表单的提交序列号。这里我定义为“$userLastAction”。然后在表单里加入一个hidden变量,把值设为$userLastAction+1:
<input type=Hidden name=lastAction value=<? =$userLastAction+1 ?>>
最后,在处理提交之前判断表单是否已被提交过:
if($lastAction>$userLastAction and inputIsValid(...)){
$userLastAction++; // 序列号加1
// 处理表单数据
} 原文:
Avoid multiple form submissions
Submitted By: Douglas E. Cook
Date: 07/26/00 19:46
Does your database suffer from "duplicate post" syndrome? The cure isn't too difficult. Here is a simple way to prevent users from submitting the same form multiple times. First, declare a session variable to store a serial number for each form. I call mine "$userLastAction." Then, in every form where duplicate submission is a problem, include a hidden field, and set the value to $userLastAction+1: <INPUT TYPE=HIDDEN NAME=lastAction VALUE=<?= $userLastAction+1 ?>> Finally, verify that the form has not been previously submitted before acting on the submission: if($lastAction>$userLastAction and inputIsValid(...)){
$userLastAction++; // Increment serial number
// Act on form here
} 译自:phpbuilder
我的一个留言板程序如果把添加留言界面,显示留言界面,处理留言程序都放在
同一个页面中text.php
就出了一个问题
用户添加完留言后,按刷新程序就不断的把刚才的输入数据再添加到数据库中
再显示出来,也就是用户输入一次,然后按刷新十次它就相当于用户输入十次
该怎么改掉这个bug???
你可以在处理留言完毕后输出一个 javascript的网页转向语句就停下来<?php
if($_POST['op']=="add")
{
//处理留言操作
....
echo ("<script type=\"test/javascript\">location='main.php';</script>");
exit;
}
?>
显示留言网页