Hi guys, this is driving me crazy. I don't care which method I use, I just want it to work. How can I get my script to check if the user submitted article is accessible or not?

I can't figure out how I can get it to work with all of the possible urls
www.website.com
http://www.website.com
https://www.website.com
http://www.website.com/directory/index.php?id=2425
etc.

Any help would be greatly appreciated :)