What is the difference between $_SERVER['SCRIPT_FILENAME] and $_SERVER['SCRIPT_NAME]?

Question

As I learnt $_SERVER['SCRIPT_FILENAME'] returns path of currently executing file and also $_SERVER['SCRIPT_NAME] also return path of current file. If there is a difference how they can be used?

Answer 1

in my case:

$_SERVER['SCRIPT_FILENAME'] - returns full path of your script file, for example 'Z:/www/www.localhost/index.php' (Win) or '/home/www/index.php' (Debian)

$_SERVER['SCRIPT_NAME'] - returns only file name '/index.php'

Answer 2

Use _ (Underscore)

Answer 3

_