Alright power PHP users out there, Adam Trachtenburg has a little quiz for you to see how much you know about working with the DOM in PHP.

Here's a question based on a recent PHP bug report which shows why DOM is fun. [...] But how do you retrieve it (the namespace URI of the root node) using DOMElement::GetAttributeNS()? What are the two magical input parameters to coax that value out?

The code is simple, but it's an interesting problem - anyone have any answers?