installing with “save” php version

I try to install WP on a server with so called save php, i.e., things like

include(‘../include/my_functions.php’);

will not work but should be replaced by something like

include(‘include/my_functions.php’);

Is there a version of WP without using files on higher levels, or can anyone point out the places were files on a highter directory level are used so that i can possibly edit them myself?

Thnx in advance!