The header information that is used to stop the browser caching (remembering) the page is the code you have asked what is this..
header("Cache-Control: no-cache, must-revalidate");
this line tells any proxy servers not to cache the page.
header("Pragma: no-cache");
Same here just telling servers not to cache
header("Expires: 0");
This sets the expiry date of the page to be zero and therefore obsolete.
The above three lines should stop proxy servers, web accelerators and browsers from caching a page.
Mark.
