Zitat von Balazs GAL <balsa at rit.bme.hu>: > > I don't get an error about it. > > Is the 'is_a' func. php version specific? Yes, is has been added in 4.2.0 IIRC. Jan. -- http://www.horde.org - The Horde Project http://www.ammma.de - discover your knowledge http://www.tip4all.de - Deine private Tippgemeinschaft