Help with a tut

[feri_soft 0]

I read this tutorial:
[a href=\"http://www.phpfreaks.com/tutorials/9/2.php\" target=\"_blank\"]http://www.phpfreaks.com/tutorials/9/2.php[/a]

but i can't understand what all this variables mean.How the arrived there.And if i am reading a tutorila how to get it 's id .For example

$tutid=$_Post['id']


is that correct???But how to determine which is exactly,if i select them nothing will happen. Tell me please i am a noob ;)

[feri_soft 0]

cant anybody help me???