I'm trying to include using require_once, however, I don't always know what the file structure will be relative to the DOCUMENT_ROOT...
it could be... /config.php or /theapp/config.php or /dev/theapp/config.php or /something_else/theapp/config.php
I COULD path back from the file like require_once('../config.php') except in some cases the files may be in a symlink directory.
Basically I'm trying to find a way where NO MATTER the circumstance, any files that call the config.php file can find it.