how to clear browser cache in php after logout

At the top of the Firefox window, click on the Firefox button (Tools menu in Windows XP) and then click Options
Select the Advanced panel.
Click on the Network tab.
In the Cached Web Content section, click Clear Now.

i need a code to put in php file

<?php
header("Expires: Tue, 01 Jan 2000 00:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");
?>

may these help you

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