Re: Checking for characters in string

This one had me for a min, thank god for the lookahead =) $password_string being the password in quesiton, $is_valid = true when it is valid, false when it's not valid. $is_valid = preg_match("/(?=.*\d)(?=.*[a-z])(?=.*[A-Z])./", $password_string); I've said it before and I'll say it again, preg is ~40x faster than ereg/eregi and (IMO) better. Enjoy, Joe "Richard Black" <rblack@datavisibility.co.uk> wrote in message news:01C1950C.06A77AF0.rblack@datavisibility.co.uk... > > Hi, > > I'm writing a page which will allow user's to register for an online service. They register a username and password. > > I want the password to contain at least one lowercase letter, at least one upper case letter, and at least one digit. So > > passW0rd would be valid, but password would not. > > Whats the most compact way to do this? substr? ereg? > > Richy > > ========================================== > Richard Black > Systems Programmer, DataVisibility Ltd - > http://www.datavisibility.com > Tel: 0141 435 3504 > Email: rblack@datavisibility.co.uk >