Accessing files in a parent directory

Is it possible to access files using:

include(“”);

in a parent directory without using
the entire web address?

I have to edit many of the same files
over and over because I use them
in different directories. If I transfer
to a different domain, I have to go in
and edit everyone of them.

However, if I could access the parent
directory, it would solve this problem.

Example:

[code=php]www.domain.com/config/config.php[/code]

is commonly used, yet I need to access it
from a different directory:

/public/index.html …

[code=php]
code…

include(“www.domain.com/config/config.php”);

code…[/code]

Couldn’t I use something like:

[code=php]
include(“\config/config.php”)
[/code]

Which I know does not work, but I’m sure there’s
a way to do it.

Also in #PHP _↴