Organisations have software that's been around for many years, in many instances decades. Curiously they don't rewrite everything just because COBOL or Java or C++ or whatever has become unfashionable among some portions of the dev world ;-)
Genuine question ;-)
What utility value will you get out of PHP rather than Java? Why should priorities favour the PHP over Java, or C, or Lisp, or whatever?
I still have this vain hope that folk will get back to teaching programming - rather than specific programming languages. During my degree back in 1988-91 we built non-trivial programs in all of: Pop-11 (yes - nobody has heard of this ;-), Prolog, Lisp, ML, Modula-2, C, plus some stack-based assembler whose name escapes me at the moment. Not to mention trivial playing Smalltalk, Occam, shell scripting and probably others that I've forgotten. And this wasn't even a straight CS degree!
Sometime between now and then the universities started chucking out people who were just taught Java, or Python, or some other single-language.
Sigh.
I seem to have ranted a little off-topic... I'll shush now ;-)
Sometime