Can HTTP 304 message be avoided?

When using Codeigniter or a simple php pag开发者_运维百科e, loadin my test page once I get the normal 200 status but if it is cached I get the 304 message. I realize this is just a signal that the resource is cached but could I avoid it? If so, how? Thank you.

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... or you could just do

header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past

in your PHP files right at the top. That way you have control over which pages not to cache and leave Apache running as it should.

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If you don't want the page to be cached by browsers you need to configure the apache server to send the appropriate headers.