RE: [PHP] RegExp Problem

the example posted after me is better that mine... anyway: it sounds like this: if (case insensitive ereg is not only( from the beginning (^) [ any of this: from a-z, from 0 to 9 and _ ] to the end ($) ) ) then reject.. if(!eregi("^[_a-z0-9]+$", $var)) echo 'rejected'; ====================== the second one is better since it checks directly if the string is [alphanumeric(note that the case doesn't matter at all)] and there's an _ . then the string is allowed. if (!ereg('^[[:alnum:]_]+$', $str)) echo 'rejected'; I think you should read this: http://www.phpbuilder.com/columns/dario19990616.php3 Cheers! -----Original Message----- From: Mukul Sabharwal [mailto:phpguru@yahoo.com] Sent: Wednesday, October 18, 2000 5:32 PM To: Maxim Maletsky Subject: RE: [PHP] RegExp Problem hi, thanks... could you possibly explain this stuff... i know about ^ and $ ... but why was + there.... is this correct also : eregi("[^_a-z0-9]", $var); thanks. --- Maxim Maletsky <maxim@japaninc.net> wrote: > if(!eregi("^[_a-z0-9]+$", $var)) > echo 'rejected'; > > Just a scratch... > > > -----Original Message----- > From: Mukul Sabharwal [mailto:phpguru@yahoo.com] > Sent: Wednesday, October 18, 2000 5:18 PM > To: php-general@lists.php.net > Subject: [PHP] RegExp Problem > > > Hi, > > I want to do the following : > > a variable with the following values to be accepted > ... > > if $variable contains > > (1) numbers > (2) underscores > (3) letters > > to be approved and anything else to be disapproved.. > how do i do this.... > > I would like to use pcre for this (preferably) but > ereg would also do.... > > thanks... > > __________________________________________________ > Do You Yahoo!? > Yahoo! Messenger - Talk while you surf! It's FREE. > http://im.yahoo.com/ > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: > php-general-unsubscribe@lists.php.net > For additional commands, e-mail: > php-general-help@lists.php.net > To contact the list administrators, e-mail: > php-list-admin@lists.php.net > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: > php-general-unsubscribe@lists.php.net > For additional commands, e-mail: > php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net __________________________________________________ Do You Yahoo!? Yahoo! Messenger - Talk while you surf! It's FREE. http://im.yahoo.com/