PHP: Adding parameters to a url?

Question

If I have the url mysite.com/test.php?id=1. The id is set when the page loads and can be anything. There could also be others in there such as ?id=1&sort=new. Is there a way just to add another to the end without finding out what the others are first then building a new url? thanks.

Answer 1

As an alternative to Kolink's answer, I think I would utilize http_build_query(). This way, if there is nothing in the query string, you don't get an extra &. Although, it won't really make a difference at all. Kolink's answer is perfectly fine. I'm posting this mainly to introduce you to http_build_query(), as you will likely need it later:

http_build_query(array_merge($_GET, array('newvar'=>'123')))

Basically, we use http_build_query() to take everything in $_GET, and merge it with an array of any other parameters we want. In this example, I just create an array on the fly, using your example parameter. In practice, you'll likely have an array like this somewhere already.