User redirect()

Hi friends
im new to php programming.., i just want one help from u.., i started to create a webpage.., it consist of login page,home page,studentdetails etc.., my query is if i click back button it should backtrack till home page it should not backtrack to login page.. pls respond me quickly..,

You're asking how to derail the basic functionality of a web browser, which is generally a bad idea. People need their browsers to behave consistently.

One thing you could do is open a new window when someone logs in, which gives you a "base" page that can't be backed into any other page.