Prueba asi:
http://localhost/login/consulta.php?...dc=xxxx&dc=com
// con & concatenas las variables
$uid="";
if (!empty($_REQUEST['uid'])){
$uid=$_REQUEST['uid'];
}
$users="";
if (!empty($_REQUEST['users'])){
$users=$_REQUEST['users'];
}
$dc="";
if (!empty($_REQUEST['dc'])){
$dc=$_REQUEST['dc'];
}
echo "uid = ".$uid."<br>";
echo "users= ".$users."<br>";
echo "dc= ".$dc."<br>";