Re: Preg_match.

On Fri, 8 Dec 2000, Monte Ohrt wrote: > actually, I wasn't exactly what you wanted. > Try this: > > if (preg_match("/^[^._][a-zA-Z0-9._]*[^._]$/",$string) && > strlen($string) < 21) > echo "good"; > else > echo "bad"; > > That should cover it. > > Monte Ohrt wrote: > > > > /^[^._][a-zA-Z0-9._]{2,20}[^._]$/ > > > > Jonatan Bagge wrote: > > > > > > Hi > > > > > > I'm trying to make a regular expression for use with preg_match to meet > > > the following criterias: > > > > > > May contain: a-z A-Z 0-9 _ . > > > May not start nor end with: . _ > > > Must be: 2-20 characters long > > > > > > I know this is a really easy one but let's face it I truly suck at > > > regular expressions. > > > Also..Please don't flame me for being OT. > > > > > > -- > > > 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 > > > > -- > > Monte Ohrt <monte@ispi.net> > > http://www.ispi.net/ > > > > -- > Monte Ohrt <monte@ispi.net> > http://www.ispi.net/ > No, that won't do it either. Try: /^[0-9a-zA-Z][0-9a-zA-Z._]{,18}[0-9a-zA-Z]$/ FYI, you probably have your reason(s) for using preg, but here's the equivalent in ereg: ^[[:alnum:]][[:alnum:]._]{,18}[[:alnum:]]$ -- Ignacio Vazquez-Abrams <ignacio@openservices.net>