Passwords Regex Function

//Passwords must be at least 6 characters long with one uppercase letter and one number

function strongpassword($str)
    {
       return (!pregmatch('/^(?=^.{6,}$)((?=.[A-Za-z0-9])(?=.[A-Z])(?=.[a-  z]))^.$/', $str)) ? false : true;
    }
</code>
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