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Asked: 2026-05-26T19:14:18+00:00

Okay, i’ve got a website ( https://illution.dk ) and almost all of my included/linked

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Okay, i’ve got a website (https://illution.dk) and almost all of my included/linked files are sending out an “304 Not Modified” header.
Except for:
https://illution.dk/include/style.php
which is always returning an “200 OK”. My headers for style.php are:

HTTP/1.1 200 OK => 
Date => Fri, 11 Nov 2011 15:44:39 GMT
Server => Apache/2.2.6 mod_auth_kerb/5.3 PHP/5.2.17 mod_fcgid/2.3.5
X-Powered-By => PHP/5.2.17
Expires => Sat, 12 Nov 2011 16:44:39 CET
Cache-Control => max-age=290304000, public
Pragma => 
Set-Cookie => PHPSESSID=dkh4jdqko9t6ihp760sn4v28a2; path=/; domain=.illution.dk
Last-Modified => Fri, 11 Nov 2011 15:52:18 GMT
Connection => close
Content-Type => text/css

What can the problem be?

Thanks in advance!

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1 Answer

  1. Editorial Team

    In my test, the browsers sends the If-Modified-Since header

    If-Modified-Since:Fri, 11 Nov 2011 15:57:48 GMT

    But the page returned has the following modified date

    Last-Modified:Fri, 11 Nov 2011 15:58:44 GMT

    which is later that the If-Modified-Since date, which means the server side(PHP) thinks it always has a later version than the browser’s cached version, causing it to send back the file every time.

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