Turn OFF Cache for specific file with Apache

Question

I have a page on a site which uses random() twig, in Firefox and Chrome it is prevented from working because it gets cached as soon as the page loads.

Is there a way to turn off caching of a particular file via the Apache configs, lets call it default.html or even better just turn off caching for the script part of that file but keep caching image files?

I have tried .htaccess but this does not work.

The only way currently that allows the script to work is to turn off caching globally via PHP headers:

<?php header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); header('Cache-Control: no-store, no-cache, must-revalidate'); header('Cache-Control: post-check=0, pre-check=0', FALSE); header('Pragma: no-cache'); ?>

But as I only need to turn off caching for an individual page, turning it off for everything seems crazy.

Cemal Okten · Accepted Answer · 2015-07-09 12:39:36Z

Figured it out, to target a specific file (in this case index.php), add this code to the bottom of .htaccess

<Files index.php> FileETag None Header unset ETag Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate" Header set Pragma "no-cache" Header set Expires "Wed, 11 Jan 1984 05:00:00 GMT" </Files>

Alternatively to target a specific selection of files, ie. I'd like to cache images but nothing else (files that match html, htm, js, css, php will not be cached):

<filesMatch "\.(html|htm|js|css|php)$"> FileETag None Header unset ETag Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate" Header set Pragma "no-cache" Header set Expires "Wed, 11 Jan 1984 05:00:00 GMT" </filesMatch>

To check the .htaccess was being read I entered a few lines of rubbish at the bottom, found out it wasn't being read, renamed it from htaccess to .htaccess and it worked.

What about the images that are called on that specific page? Will they still cache?
I think Expires is ignored, when Cach-Control "max-age ..." is used: developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Expires

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