Is there an environment variable (like $PHP_SELF) which is the host name of the remote user? like how $REMOTE_ADDR is the remote IP addres... is there a variable that gives the host name (which you could also get by gethostbyaddr($REMOTE_ADDR), but is more expensive), ie get "localhost" for "127.0.0.1" or something, without the nameserver hit?
--Jason
