It's true that PHP gets the job done, that it's easy to learn and very easy to set up. This makes for a perfect "introduction to the web" language.

Which is why I began developping websites with it. But at some point, I felt like it was preventing me from really understanding what was going on behind the scenes, and I moved away from GRails and now nodejs.

I don't hate PHP but I think Jeff's last point is good: we need framework as easy to learn and setup, but that lets you understand how the web really works.