Help with the Session_register variable

[Aphp73]

I'm trying to make a Magic 8-Ball PHP page and I need to save the login name(I have a login page that takes the person to the 8-ball page). I basically need to save the users name, I am thinking the Session_register variable might do it, but I'm not sure how it works.
session_start();
if (isset($_SESSION['run']))//save sessions to page
{
  $run = $_SESSION['run'];
  if (isset($_POST['name']))
  {
  $firstname = $_POST['name'];
  session_register('$firstname');
  }
This is what I've started with to pull the name off the form and save it too the server. I don't know how to call it in the body though. Thanks in advance for any help.
Aphp73

[tomfmason]

You don't have to use session_register..

Just use
[code=php:0] $_SESSION['firstname'] = $firstname;[/code]

Good Luck,
Tom