It was never intended to be a PHP logo, but there is this crazy talented designer in France named Vincent Pontier who thought the letters PHP looked like an elephant.
Watch the short video here on the birth of the éléPHPant:
http://www.elroubio.net/naissance_elephpant.php
He also has a series of PHP pinups:
There isn't even a statement of who or how one would benefit from something like this.
Their homepage badly needs a mission statement, or a "Welcome, PHP for Android is for those who...... something"
That being said, I think I may understand a little as to the "why" by looking at the scripts that are on the site.
It appears that this is for people who just like coding in PHP and would like to use that language when coding for Android..... I think. It's about the language.
I am probably going to test it out. I'm wondering if the apps written using this exist entirely inside an embedded browser. That might be interesting.
Other people might benefit too, or perhaps not. There's no extra charge.
I do like the logo though.