Re: check for alphanumeric characters

* John Nichel <john@kegworks.com>: > Diana Castillo wrote: > > what kind of a function can I use that will tell me whether a variable is > > alphanumeric (that is has only characters A-Z or 1-9 )? > > Something like this should work. (untested) > > preg_match ( "/^([a-z]||[A-Z]||[0-9])+$/", $string ) It can be simpler than that, actually: preg_match('/^[a-z0-9]+$/i', $string) (tested and works) -- Matthew Weier O'Phinney | WEBSITES: Webmaster and IT Specialist | http://www.garden.org National Gardening Association | http://www.kidsgardening.com 802-863-5251 x156 | http://nationalgardenmonth.org mailto:matthew@garden.org | http://vermontbotanical.org