Implementing a new piece of software is working with a black box that doesn't even exist yet. You know something about what's supposed to come out of the black box, but typically not much.
So
Dagfinn Reiersøl on PHP, agile development, Ruby and other addictive substances
$this-> isnt working for urls? at least not for me, or problem is with something else
I’m afraid I don’t understand the question. All I can say is, the example is not supposed to “work” in the sense of doing anything real or useful. It’s a preliminary exercise.