Expire & Last-Modified header problem

[afshin.m]

Hi,

 

I use this headers for my PHP file:

        header("Last-Modified: " . gmdate("D, d M Y H:i:s",filemtime("../cache/css/".$md5file.".css")) . " GMT");
header("Expires: " . gmdate("D, d M Y H:i:s", time()+(2592000)) . " GMT");
header('Cache-Control: public, max-age=2592000');

 

But when i check my website in FireBug, i get 200 OK response but i think this is should response 304 Not modified ...?

 

See this details :

 

[b]Response Header[/b]

Date	Sat, 05 Jun 2010 07:04:53 GMT
Server	Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.12 OpenSSL/0.9.8l mod_autoindex_color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1
X-Powered-By	PHP/5.3.1
Last-Modified	Wed, 28 May 2008 21:02:26 GMT
Expires	Mon, 05 Jul 2010 07:04:53 GMT
Cache-Control	public, max-age=2592000
Content-Encoding	gzip
Vary	Accept-Encoding
Content-Length	408
Keep-Alive	timeout=5, max=99
Connection	Keep-Alive
Content-Type	text/css

[b]Request Headers[/b]

Host	localhost
User-Agent	Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3
Accept	text/css,*/*;q=0.1
Accept-Language	en-us,en;q=0.5
Accept-Encoding	gzip,deflate
Accept-Charset	ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive	115
Connection	keep-alive
Referer	http://localhost/cache/test.php
Cookie	PHPSESSID=fnrlds14pqedj0s96mvasfqvo5
If-Modified-Since	Wed, 28 May 2008 21:02:26 GMT
Cache-Control	max-age=0

 

And more about cache:

 

Last Modified	Sat Jun 05 2010 10:34:53 GMT+0330 (Iran Standard Time)
Last Fetched	Sat Jun 05 2010 10:34:53 GMT+0330 (Iran Standard Time)
Expires	Mon Jul 05 2010 10:34:53 GMT+0330 (Iran Standard Time)
Data Size	408
Fetch Count	23
Device	disk

 

Is there any solution? 

Thanks.

[ignace]

If you want a 304 Not Modified reponse you need to write it otherwise it returns a 200 OK response.

 

header('HTTP/1.0 304 Not Modified');

[afshin.m]

Hi,

Thanks ignace but when i use this header, content not loaded and returns 0 bytes of data. (For example CSS not loaded and i my website without CSS style)