I used to be able to place the cursor on a php function and press the F1 key to get help on that function. This no longer works. Several of us in the PartsWatch office are all experirncing the same issue. We are all running on 64-bit Windows 10 with latest updated installed. The issue immediately surfaced after we upgraded from PhpEd 17.0 to PhpEd 18.0. I can't find a setting that would affect this.

Tools> Settings> IDE> Help: all manuals are checked.

The help works. I can open the PHP Manual and view all pages. Help in Functions also works. It's just the context help using the F1 (or CTRL-F1) that's not working. It's very frustrating. I used that feature extensively.

It works fine for me in v18.
What build are you using?
Did you install a different php manual, not the one distributed with PhpED?

I'm using 18.0 (Build 18020, 64bit) on Windows 10.
I didn't do anything out of the orderinary when upgrading from v17.0 to v18.0 of PhpEd. We just install and select EVERYTHING.

you may want to update to 18030
problem is not appearing in this build

that did it! Installing build 18030 resolved my issue. Context help is working once again. And the world is a much better place.
Thank you SO VERY MUCH!

I am using 18035 and it is not working.

It may depend on the function. IF it is in the manual index, it will be found. Otherwise it may not.
If you have an old PHP manual, you can update it yourself. It's in %PROGRAMFILES%\nusphere\phped\help
Note that you have to login as Administrator to replace files in this directory.