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The question might sound stupid.
I am using NP++ 6.8.8 (the latest I addording the homepage)
I would like to use the function list (basically as described here), with
nothing special, just to see PHP-functions.
I can open the function list window, but don't see any functions.
Do I need to do something to get this working?
The functionList.XML - in the NPP installation directory - looks OK. And I have not used function lists it until now, but know it worked some time back.
PS:
not even this helped Notepad++ function list PHP not working if I didn't close the PHP tag

The functionList.xml in the %APPDATA% (= C:\Documents and Settings\< User >\< App Data >\Notepad++) need to be deleted (or renamed).
This file only containes a three languages, while the file in the Program directory contains many more languages.
In addition the link to Notepad++ function list PHP not working if I didn't close the PHP tag was helpful as well.
NPP Ref:
https://notepad-plus-plus.org/community/topic/11285/how-to-activate-function-lists-in-notepad