I just learned of the existence of include-search, but even after reading
:help includeexpr I'm not sure what I need to do to have
[I find included and required files.
How do I configure include-search for both included and required PHP files?
I think I need to set
includeexpr such that it allow searching files whether they were included using
include_once; but I'm not sure. And I don't quite get what the variable is supposed to have.