Ok, first thing:
I'm using drupal6

When a user logins I want to load a page that shows some user stats.
The stats are taken from the users row.

Now in the php script will i still need to add:
mysql_connect('ip-address','username','password');
where username is the current user logged in?

Or can i just fetch the data, since the user has already logged in?
If i cant do that, How do i get the php script to recognise the current logged in user?