_SERVER is http://

_SERVER['HTTP_HOST'] = websrv1.fenf.edu.uy

_SERVER['REQUEST_URI'] = /tildes.php

FULL URL (not decoded) = http://websrv1.fenf.edu.uy/tildes.php

FULL URL ( urldecoded) = http://websrv1.fenf.edu.uy/tildes.php

FULL URL (doble-urldecoded) = http://websrv1.fenf.edu.uy/tildes.php