php and caching pages

[blue928]

Hi, working on a simple project that i just can't seem to get to come together. I run a dynamic site using php and mysql and don't want people to be able to cache pages.. or at least, I want them to have to reload the page each time they view it, even it they hit back on their browser, if possible... how can I force a page to reload and to keep it from being cached?

thx
blue

[yelvington]

Read about header() in the PHP manual and about cache-control here:

http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html

[Anon]

Use this snippet before your script or page does any other output (put it on the first lines of the page)

<-- code start -->

<?php
header("Expires: Mon, 26 Jul 1997 05:00:00 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"); // HTTP/1.0
?>

<-- code end -->

You could also configure your http or proxy server not to cache these particular pages or any PHP pages on your site