Simple PHP Issue

[Spybot S&D]

Well, what I need done isn't very hard, I just don't know PHP.

What it is is just a page that displays certain member information (If you are logged in) and if you aren't, it will show 2 blank fields and a command button (Login).

If you are logged in, you will see this:

#username#<Your Username>#/username#
#IP#<Your IP>#/IP#
#post#<your post count>#/post#
#group#<Your User Group>#/Group#

You can add more stuff if you want, those are just the needed ones. This is for an authorization system for a program of mine

Thanks,
Alex.