ACL is an Access Comtrol List

[eluser]BigJoe[/eluser]
[quote author="Predator" date="1331989700"]I was looking for the same. And I found this -> http://www.tastybytes.net/blog/simple-ac...odeigniter

Seems very interesting approach(specially the one in the comment below), I HAVEN'T tried it yet, but I am going to do it tonight.
[/quote]

I wanted to see if you had any luck with this. Sense I didn't, I was hoping for some help on this.

The problem is that I need some sample data to add to the tables so I can test this and the other is that I don't under stand just what theses lines do.

Code:

$acl_test = $this->uri->segment(1).'_';
$acl_test .= ($this->uri->segment(2)!="")?$this->uri->segment(2):'view';

Can some one explain those lines to me so that I can under stand just what they do.