PHP gets websites built. But what use do I have for it if I want to make software? you know, something other than pumping ascii over a socket descriptor?
What we should be questioning is how pointless would such endeavor be.
Like kenjackson pointed out (and, oddly, this time I agree with him ;-)), your toolbox should not be restricted to PHP, however Turing-complete it may be.
But I have no intention of even dedicating one minute to such thoughts