First, thanks for the great editor it really rules.
But one question, is it possible to highlite standard PHP function. I think it shouldn't be to hard to implent, because there's already an ini file with all the PHP functions.
Yes, there is an ini file, but it is huge and syntax highlighting takes a lot of time. We had even to implement fast sorting algorithms to make it available for auto complete and it is still relatively slow if we need to load the full list.
Are you willing to wait one second for opening every PHP document? If there were say 100 of functions, that would be no problem, but with all those PHP modules, the number reaches thousands... which would make the software slow.