To be fair, you need to know the entire left-hand side of that graphic with PHP. The bottom-right quadrant is stuff you _should_ be doing (formalized methodology, version control, and testing). And the top-right quadrant is language-specific, in that you can replace it all with PHP and your PHP framework of choice (if necessary).
My experience with PHP has not been as terrible as most rails users make it out to be. Once I learned the PHP syntax I got flying with it, I didn't have a single problem.
I just don't see the point in ditching PHP now to learn ruby just because it has become the latest online fad, better to stick with what I know until I develop serious problems with PHP which I believe only changing languages could solve.
How exactly does PHP make it easier again?