note 13543 added to function.header.php

Hi there... Cache problems AGAIN :) Adding HTTP headers avoid pages to be proxy-cached, ok, it works fine. But how can you prevent IE from caching a page accessible by the BACK button ?? Those headers : header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header ("Cache-Control: no-cache, no-store, must-revalidate"); header ("Pragma: no-cache"); avoid proxy cache but not IE local cache. I have a web site with a private section requiring a login/password. When i disconnect from this section, i would like the pages i just went througth TO BE UNAUTHORIZED by any person on this available browser. But, after i disconnect, if i press the BACK button, the private page appears (NB: i check authorized acces with php code at the beginning of every private page...) Any solution ? my IE version (french) 5.0 on W2K SP2. Gregory GOUBERT ggoubert@dbarc.com http://www.php.net/manual/en/function.header.php