This is more a reminder for myself, as I’ve tried this for some times with no luck.
I like playing with different php IDE to see what they can offer…
For now I’m on Komodo Edit 4.3 a free IDE.
So using this IDE I was looking for a way to use my chm file as help instead of the web.
So here is the line you have to put in Edit>Preferences>Languages Help>PHP
Maybe this will help some…