Add Expires Headers - PHP

You would normally add such headers by either configuring the webserver (for example using a .htaccess) or by serving the page components through PHP. The first method is preferred, as it doesn't require PHP to be loaded for every component. Have a look at http://www.askapache.com/htaccess/apache-speed-expires.html for an example using .htaccess.

Hi, thanks gentleman.

I have tried the PHP header() function but this is returning no results within the live web test so I'll pass this over to our backend developer for changes to server config.

I'll return soon!

Thanks again

Hi, quick question...


@ svgmuc: How do we format the code for server config? I take it we remove the quotes ""?

Hey don't worry... I followed your link and found the resource at apache.

I use this codes on my development :

<?php

header("Expires: Thu, 17 May 2001 10:17:17 GMT"); // Date in the past
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Pragma: no-cache");

ob_start();

?>

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I see what you're saying however, I need to instruct the user agent to cache a vast majority of files that we distribute with our page.

Your expires header looks to be initializing no cache at all.

As I said before, I've used the code below to no avail and would like the server to take care of this... running test now so will get back in a short time...

$expires = 60*60*24*14;
header("Pragma: public");
header("Cache-Control: maxage=".$expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time()+$expires) . ' GMT');

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Thank you,

I was only going to award points to @svgmuc for his direction as this is what I needed however, Ray offered a great solution to cover required downloads.