xgettext error: language php unknown

[Tench]

Hi.

I am using gettext to translate a PHP site.  The following line of code

	xgettext --keyword=A_ --keyword=T_ --language=PHP -o transstuff.pot 
../*.php

gives me this error:

        xgettext: language `PHP' unknown

Now, my PHP 5.0.1 has been compiled with gettext, and I'm using gettext 
0.11.4.  Why would it treat PHP as unknown?  Any idea on how to fix 
this?

All best,
Tench