zend_highlight routine

I'm rewriting the highlight_file/string methods in userland code (using the tokenizer) because I've found the native functions painful. It is difficult to insert line numbering properly, and have accurate function referencing - most pastebins now use PEAR's Text_Highlight to highlight the code with a bunch of intensive preg_matches. Hopefully this can be updated one day (though according to the bug reports it caused segfaults with the current implementation), but until then I thought this may be useful. I'm almost finished: http://aidan.dotgeek.org/lib/?file=PHP_Highlight.php My problem is the token2color method, I'm not sure which tokens are classed as keywords. At the moment I've just guessed as many as I could think of, it's a bit ugly - presuming there is an easier way to do it. I've had a look through zend_highlight.c and found that anything with token.type = 0 is highlighted as a keyword, however I'm unable to track down where token.type is set. Is anyone able to provide some insight? King Regards, Aidan Lister