Porter extension cleaned up

After seeing my name in lights on the weekly PHP summary, I decided to go back into that Porter extension I had wrote about earlier and clean things up a bit. I stripped out all of the C++ stuff to make it a bit of an easier fit with PHP's C code (and it seems to be running slightly faster to boot). For now, it can only stem English language words, but after reading some interesting work by Dr. Porter at snowball.sourceforge.com, I'm thinking I'll start adding more languages soon. (Most notably, since I work on a Canadian web application, Francais is forthcoming.) For now, the prototype of the lone function in the extension is string porter(string word) which takes a word, uppercases it, removes and suffixes and returns the word's stem, or "-1" on any sort of failure. (I'm thinking just to return the word itself, uppercased and unchanged if there's some sort of failure -- comments?) If I get around to adding languages, I'm thinking the prototype should be changed to something like string porter(string word [, string lang]) where the optional lang argument will be some language code, i.e. EN, FR, RU, etc., using EN for the default. Comments? Queries? J