PHP的当前URL

Question

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)

UPDATE: I am terrible with PHP, so sorry. I just put

<?php echo'<a href="http://sumov.co.cc/?url=".$_SERVER["REQUEST_URI"]; class="buttonlink ui-state-default ui-corner-all"><span class="ui-icon ui-icon-newwin"></span>Support &rarr;</a>'; ?>

and that just went to http://sumov.co.cc/?url= (sumov.co.cc is my short link).

Answer 1

To get the url:

$url = "http://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];

And I recommend to use urlencode( $url ) and urldecode( $url ) to wrap and unwrap it for transfering safely.