I have a link shortener system (Yourls) set up so you can go to the short url with ?url=[xyz] (where [xyz] is the url you wan to shorten) added to the end will shorten the URL. I want to add a link to a separate page (on my MediaWiki wiki) that shortens the permalink of the page that it is on. I need to add the button to my template in a way that will add the URL of the current page to the link. MediaWiki is a PHP platform, so that is preferred (but JavaScript is fine too). How can I do this?

(I apologize if this is confusing)