Current URL?

Trying to get the current viewed page's URL (query string intact). this works, but infrequently: $url = $_SERVER['URI']; and this ignores the query string: $url = $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']; I'm certain there's a way, that is browser-independent, to get your script to grab the current URL (even if the script is an include). i'm just trying to get a log of users currently online, and which page they are viewing, and while the $_SERVER['REMOTE_ADDR'] will invariably grab the IP, $_SERVER['URI'] is often empty. i welcome any and all suggestions. thank you, ~jmp