How do i fetch my file's absolute path

Question

say i have a file /var/www/foo/test.php

how do i find out it's path from within it. i'm trying to create an "Add To Include Path" action, and for that i need absolute paths.

Answer 1

You can use the magic constant, __FILE__

http://us2.php.net/manual/en/language.constants.predefined.php