I have a page that is redirected - let's say for the sake of argument that it's the following:

www.website.com/yellow

Which, through the magic of htaccess, behind the scenes shows www.website.com/showcolor.php?id=yellow

Now, say I wanted to pass an additional variable, like a code?

www.website.com/yellow?code=123

Is this possible? And if so... how do I do it?

and just so you know - there is no trailing .php in url.