PHP“文档过期"；使用后退按钮后 [英] PHP "Document Expired" after using the back button

问题描述

我有一个在向导中归档一些信息的表格. POST到达此页面，并与Smarty一起显示.将所有信息归档后，我将使用另一篇文章转到另一页.现在的问题是，当我尝试使用返回"按钮返回时，会收到文档已过期"消息.

I have a form where I am filing some informations in a wizard. This page is reaching by POST and displayed with Smarty. Once I filed all the informations in, I am using another post to get to another page. Now, the problem is that when I am trying to go back with the BACK button, I am geting the "Document expired" message.

在使用POST时，这是正常现象吗?

Is than a normal thing while I am using POST or?

我现在正在尝试使用GET，但是没有任何变化，或者我的GET错误.

I am trying right now to use GET but nothing changes, or my GET is written wrong.

这是一个小模式:

Page 1 -> POST -> Page 2 (wizard) -> POST -> Page 3

当我尝试从第3页回到第2页时，我的文档已过期.

When I try to come back from page 3 to page 2, I am geting the doc expired.

非常感谢您对我的问题的帮助.

Thank you very much for your help regarding my problem.

推荐答案

http://en.wikipedia.org/wiki/Post/Redirect/Get

我认为，至少在生产环境中，您应该为每次 POST进行此操作.

In my opinion, you should do this for every POST, at least in production.

小例子:

if ('GET' == $_SERVER['REQUEST_METHOD']) {
   //display view
}
else if ('POST' == $_SERVER['REQUEST_METHOD']) {
   //process input
   //update session
   header('Location: /next/page/to/view', true, 303);
}

想指出的是，这个旧帖子是指浏览器提交的内容.在RESTful Web服务中，您可能会用201来响应POST.

Want to point out that this old post was referring to browser submissions. In a RESTful web service you would likely respond with a 201 for POST.

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