How to Get full path of a file or folder

[prakarsh23]

How can I get the full path of the folder in PHP?
Is there any method like application.getRealPath() which is used in JSP?

[thinsoldier]

http://php.net/manual/en/function.realpath.php

__FILE__

__DIR__

[astonecipher]

http://php.net/manual/en/function.realpath.php