I might have found the solution myself after three nights spent getting angry over KDE:s bad documentation...
I joined the sourceforge.net and looked at recent release notes.
I am installing the lastest version now, and will get back here later, to tell you how it turned out.
I haven't tested it in-depth yet but at least what I was looking for works as expected without ANY effort. I just started Quanta, opened the first PHP-file I saw and typed those letters.