Any Advice on Path and URL for PHP script? specifically:

$base_path="/sample/12/test/mysite/MS";//full path to script
$main_url=http://test/MS;//url to the script
$cookie_url=".test";//the domain name of your website without http://www
$tribes_folder="groups";//folder for groups to be created

As I said before I am very green to PHP and database setup is the $base_path= using my DB Name as part of the path?