I have a standard page setup at `http://mysite.com/mypage/` I'd like to setup a rewrite rule in my theme functions that takes any URLs such as: `http://mysite.com/mypage/helloworld/` <-- Currently shows "Not Found" And translates it into: `http://mysite.com/mypage/?var=helloworld` <-- Currently shows the standard page NOTE ADDED: "helloworld" is an unknown variable value, so I want ALL "/mypage/" urls to rewrite back, for example: `http://mysite.com/mypage/abc/` `http://mysite.com/mypage/1231241/` `http://mysite.com/mypage/sdfasfdadsf/` Will all rewrite back to `http://mysite.com/mypage/?var={path}`