如何强制页面不在PHP中缓存? [英] How to force page not to be cached in PHP?

问题描述

我有一个页面index.php，它显示基于mysql db的信息.上面有表单，表单的操作设置在一个单独的页面上，称为process.php. Process.php完成所有数据库CRUD的工作，然后使用

I have a page, index.php, that shows information based on a mysql db. There are forms on it, and the action for the forms is set to a separate page called process.php. Process.php does all the database CRUD stuff, then uses

header("Location: /webadmin/email/index.php");

将用户发送回原始页面.

to send the user back to the original page.

除了原始索引页面并不总是反映process.php所做的更改之外，这似乎还不错.我认为该页面已被缓存，因为如果刷新(Ctrl + F5)，页面将显示最新数据.

This seems to be working fine, except for the fact that the original index page doesn't always reflect the changes made by process.php. I assume that the page is being cached, because if I do a refresh (Ctrl + F5), the page will show the latest data.

如何防止此页面被缓存?我已经尝试 header()的PHP页面说了什么，但是它没有似乎行得通. Cache-Control和Expires选项似乎完全无效-该页面仍在缓存中.

How can I prevent this page from being cached? I have tried what the PHP page for header() says, but it doesn't seem to work. The Cache-Control and Expires options seem to have no effect at all - the page is still being cached.

更新

好吧，我在某种程度上错了.显然，以下内容在IE中确实有效:

Ok, I was partially wrong. Apparently, the following does work in IE:

<?php header("Cache-Control: no-cache, must-revalidate");

但是，它绝对不能在FF中使用，后者仍显示缓存的版本.关于这是为什么的任何想法，以及如何使它停止缓存?

However, it is definitely NOT working in FF, which is still showing a cached version. Any ideas on why this is, and how I can make it stop caching?

推荐答案

使所有浏览器排在一行:

header("Location: /webadmin/email/index.php?r=".mt_rand(0, 9999999));

虽然不漂亮，但适合提出的问题:如何 强制 ..."

It's not pretty, but it fits the question asked: "How to force..."

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