No, ( shit I'm new and in to it ... ), N.A.N. is a value of a floating point number wich is the result of some invallid opperatyion like 11/0. Integers and strings cant be N.A.N. They are 0, database NULL or empty or invallid pointers. N.A.N. is only defined by your floating point proccessor. Daan P.s. I'm here to learn about internet; ask me everything about databases or proccessors or math or physics. Learn me everything about web-sites. -----Original Message----- From: thelist-bounces at lists.evolt.org [mailto:thelist-bounces at lists.evolt.org]On Behalf Of fstorr Sent: woensdag 2 juli 2003 23:25 To: thelist at lists.evolt.org Subject: RE: [thelist] PHP is_nan > is_nan expects a floating point number. What version of PHP? +++ Hi PHP version 4.3.1 Is not is_nan a test whether a variable is a number or not? If so, why does it expect a floating point number? Regards F -- * * Please support the community that supports you. * * http://evolt.org/help_support_evolt/ Evolt.org conference in London, July 25-27 2003. Register today at http://evolt.org.uk For unsubscribe and other options, including the Tip Harvester and archives of thelist go to: http://lists.evolt.org Workers of the Web, evolt !