Delete variable permanently
I have created a login page (PHP) which send the information to the next page (POST) - When the user has done the updates, I have a button : Logout with this:
<meta http-equiv="refresh" content="0; URL=http://www.webpage.com/">
<meta name="keywords" content="automatic redirection">
My problem is that if I click the "back" button 2 or 3 times in the browser, I return to the menu page and IE asked if I want to refresh; if I click refresh, the variables are still there??
How do I stop this?