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HomeBackend DevelopmentPHP Tutorial怎么防止页面刷新的时候,表单重复被提交

如何防止页面刷新的时候,表单重复被提交!
如何防止页面刷新的时候,表单重复被提交!
希望有代码,有注释,有思路,谢谢哦!


------解决方案--------------------
使用Cookie处理 使用Cookie记录表单提交的状态,根据其状态可以检查是否已经提交表单,请见下面的代码:

1.2.if(isset($_POST['go'])){setcookie("tempcookie","",time()+30);
3.header("Location:".$_SERVER[PHP_SELF]);exit();
4.} if(isset($_COOKIE["tempcookie"])){
5.setcookie("tempcookie","",0);echo "您已经提交过表单";
6.}?> 
如果客户端禁止了Cookie,该方法将不起任何作用,这点请注意。

3.使用Session处理 利用PHP的Session功能,也能避免PHP表单重复提交。Session保存在服务器端,在PHP运行过程中可以改变Session变量,下次访问这个变量时,得到的是新赋的值,所以,可以用一个Session变量记录表单提交的值,如果不匹配,则认为是用户在重复提交,请见如下代码:

1.2.session_start();//根据当前SESSION生成随机数
3.$code = mt_rand(0,1000000);
4.$_SESSION['code'] = $code;
5.?> 
在页面表单上将随机数作为隐藏值进行传递,代码如下:

1."> 
在接收页面的PHP代码如下:

1.2.session_start();
3.if(isset($_POST['originator'])) {
4.if($_POST['originator'] == $_SESSION['code']){
5.// 处理该表单的语句,省略
6.}else{
7.echo ‘请不要刷新本页面或 重复提交表单!’;
8.}
9.}?> 

还有两种方法没有贴出来,请进:http://www.phpnewer.com/index.php/Cjwt/detail/id/356

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