Variables... How to keeping them alive?

[Sunking]

Hello,
I'm having a small problem.
I'm trying to keep a variable existant within many php pages.

Basically,
I have a website filled with php pages.
I need to use the same variable ( that I declared in index.php), in the other php webpages.. For example, $login.

I think I can do that with sessions?
But as for the code.. I just don't know how.

I'd really appreciate your help
Thanks alot

Sunking

[The_Chancer]

<?php
session_start();
$_SESSION['login']=$login;
?>

Will set the $login var in $_SESSION['login']

Just session_start(); at the top of every page you need to use the session vars in and then use tham as above...