Re: Regular Expresson for checking password strength

Adam Zey wrote:

Al wrote:

James Nunnerley wrote:

I want to have a regular expression that check the following criteria are met by $password: - contains at least 6 characters (any) - has at least 1 letter - has at least 1 number - other 6 characters can be anything... I'm happy to work out the structure of a postcode etc, but to be honest I'm still fairly new to working with regular expressions. What the best/easiest way to check whether a variable contains a range? It might be RegExp don't do this? Cheers Nunners

It can be done; but, it's simpler to simply to make an if() with (strlen($password) > 5) && (strlen($password) < max) && pre_match("%[a-z]+%i"%, $password) && preg_match("%\d+%", $password)

Some mistakes there: 1) You want to assign strlen to a variable before the if, since you're calling it twice in the if. I'm not certain how fast strlen is, but it's usually a bad idea to repeat useless function calls like that. 2) Isn't your second function call supposed to be preg_match, and not pre_match? Regards, Adam Zey.

You are correct on both counts. Getting the strlen() first will save about .01usec.