PHP ve Zend framework kullanıyorum.

Index page is having a login form. After logging , check session and it will redirect to a myprofile page. After logging in if i try to type index page url directly, it will redirect to myprofile page.

But on backspace from myprofile page its going back to index login page!! Why? Even if session is there ,on backspace it is able to reach login page. It should not happen. But if i refresh the login page it will go back to profile page.

Can anyone tell what i am missing? How can i fix the issue of backspce button. I am using PHP header to redirect.