Re: I lied, another question / problem

# jochem@iamjochem.com / 2007-01-17 11:41:54 +0100: > Roman Neuhauser wrote: > > # jochem@iamjochem.com / 2007-01-17 01:42:09 +0100: > >> if (!preg_match("#^[A-Z0-9]+\$#i", $s)) { > > > >> (ps the above is a crappy regexp for real world use imho, but it serves > >> the purpose of example) > > > > It's dangerous. > > why dangerous? > > given that this page: > http://php.net/manual/en/function.ctype-alnum.php > says, and I quote: > > "Checks if all of the characters in the provided string, text, are > alphanumeric. In the standard C locale letters are just [A-Za-z] and > the function is equivalent to preg_match('/^[a-z0-9]+$/iD', $text). > " re_format(7) on FreeBSD: A bracket expression is a list of characters enclosed in `[]'. (...) If two characters in the list are separated by `-', this is shorthand for the full range of characters between those two (inclusive) in the collating sequence, e.g. `[0-9]' in ASCII matches any decimal digit. (...) Ranges are very collating-sequence-dependent, and portable programs should avoid relying on them. -- How many Vietnam vets does it take to screw in a light bulb? You don't know, man. You don't KNOW. Cause you weren't THERE. http://bash.org/?255991