topic Re: PHP scripts caching in Firefox v101.0.1 in Discussions

PHP scripts caching in Firefox v101.0.1

kuhlaid — Wed, 15 Jun 2022 19:19:44 GMT

I'm scratching my head as to why Firefox would cache a request to a PHP script. I have never had this happen in years of PHP development. Even a Shift+Reload on the browser would not release the cache. Only after I cleared the site cache in Firefox did the correct PHP output display. Is this a bug in Firefox or some new caching feature I need to know about? I had no idea where to begin to debug this problem, nor how to reproduce it now the site cache is cleared. Is there is a caching header, etc. I need to send with PHP responses so Firefox does not cache my PHP scripts?

I would appreciate any insights.

Re: PHP scripts caching in Firefox v101.0.1

KevinBrosnan — Tue, 21 Jun 2022 18:05:40 GMT

If you are doing web development then you may want to enable the disable HTTP cache setting in the devtools. https://firefox-source-docs.mozilla.org/devtools-user/settings/index.html

Re: PHP scripts caching in Firefox v101.0.1

jscher2000 — Tue, 21 Jun 2022 19:35:03 GMT

@kuhlaid wrote:
Is there is a caching header, etc. I need to send with PHP responses so Firefox does not cache my PHP scripts?

Try

header("Cache-Control: no-store");

if you don't want browsers to cache the response.

If that isn't sufficient, is it possible your site has any caches that Firefox might be hitting? This can be an issue with WordPress sites, but I don't know about others.

Re: PHP scripts caching in Firefox v101.0.1

Digitronics — Thu, 25 Sep 2025 09:17:04 GMT

Yet, the issue still appear in Firefox 144.0 with ignoring <meta http-equiv="Cache-Control" content="no-cache">. I have not bothered to check the old <meta http-equiv="Pragma" content="no-cache"> tag though.

At the moment, I'm trying to build a PHP/MySQL page and trying different layouts has been frustrating. A way around the issue, has been to choose a different file name with each and every slightest change ... Sometimes, but rare, it performs a true refresh.

The cache issue also means that changes in the database are most of the time ignored.