to have URL's call

[Stéphane JEAN BAPTISTE]

How can I have the URL which is calling my script?

ex:
the name of my script is : "script.cgi"
URL is : http://www.computer.com/script.cgi?toto=12&titi=25
I want to have $var=toto=12&titi=25  or  $var=http://....iti=25 .

tks