Comments on: CSS Caching Hack

By: Evahn

Evahn — Thu, 05 Jan 2012 06:32:03 +0000

Oh man – thanks for this!
Was tearing my hair out with IE9 seeming to cache the CSS no matter what I did.
Worked straight up just adding ?Ver=1 after the css file call :)

By: Fahid

Fahid — Mon, 05 Dec 2011 13:44:11 +0000

Hey nice tip…!
Thanks a ton ;)

By: Nerd Guy

Nerd Guy — Tue, 20 Sep 2011 20:10:11 +0000

Why it is not used is because HTTP GET with a parm , i.e ?, is a non-cacheable item and so this works because it never get it from the cache which is not a good thing. If you do this you have to make sure the web server is marking the content as cacheable.

By: Cyril

Cyril — Tue, 13 Sep 2011 16:42:46 +0000

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By: Nandun

Nandun — Fri, 02 Sep 2011 10:54:25 +0000

Excellent tip. and its not even a hack if you really think about it.

By: web design liverpool

web design liverpool — Sat, 20 Aug 2011 14:37:51 +0000

great tips and nice information you have shared, i like it.

By: mayka

mayka — Sat, 09 Jul 2011 08:26:10 +0000

amazing….. thanks

By: mayka

mayka — Sat, 09 Jul 2011 08:25:34 +0000

amazing….. thanks for tips

By: Gerelt Od

Gerelt Od — Wed, 25 May 2011 01:03:07 +0000

I have seen many css files included with ?version=number, i always just wondered. Almost thought css gets some GET values :P Thanks for informations, now all doubts gone.

By: stiri de ultima ora

stiri de ultima ora — Sun, 27 Mar 2011 18:08:18 +0000

hell yeah this is great

By: Web Developer

Web Developer — Sun, 13 Mar 2011 10:08:15 +0000

Is it just me or does internet explorer completely IGNORE css?

By: Seferm

Seferm — Mon, 18 Oct 2010 17:22:06 +0000

great tips. keep it up

By: Costas Tryfonos

Costas Tryfonos — Thu, 14 Oct 2010 16:44:40 +0000

I agree with William S. PHP is the way to go

By: tropicalm

tropicalm — Wed, 18 Aug 2010 13:35:48 +0000

just realise you can simplify the code above by just going:

printf(“@import \”%s/css/main.css?version=%d\”;\n”, BASE_URL, filemtime(BASE_URL . ‘/css/main.css’));

By: tropicalm

tropicalm — Wed, 18 Aug 2010 13:33:09 +0000

Good trick. You can even use it inside a , with the @import statement.

e.g.
printf(“@import \”%s/css/main.css?version=%d\”;\n”, BASE_URL, getCSSLastUpdate());

Where getCSSLastUpdate is:

function getCSSLastUpdate() {
if (defined(‘CSS_PATH’) && file_exists(CSS_PATH)) return filemtime(CSS_PATH);
return 0;
}

(add a CSS_PATH define to your env file so that it points to whatever CSS matters).