Hm... wonder what's driving the change. I would still use PHP over Python any day.
More uses I guess. That's one of the reasons for me.
I can (and do) use PHP for pretty much everything, including command line scripting. Not sure what python can do that PHP can't.
Expose native COM interfaces,
So platform specific nonsense.
GUI building,
There is actually a library for that. Of course I've found less and less need for a true GUI solution as I move more and more to the web.
antigravity, libraries for all sorts of stuff (math, science, ...),
PHP has quite a few libraries if you need them.
Java integration with Jython,
Pfffftttt. Yeah, lets integrate with a crappy language
Cool libraries like boost::python that make extension writing a breeze...
Never really got the point of the boost libraries when doing C++ so not sure of what the benefit is for python.