[PHP] Way to generate Passwords

[Jochen Kaechelin]

i built a script to generate passwords:

        function passwort($laenge)
        {
                $allowed =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890:-+=";
                $allowed_length = strlen($allowed);

                $i=0;
                $pw = "";

                while ($i<$laenge) {
                        $pos = rand(0,$allowed_length);
                        $pw.= substr($allowed,$pos,1);
                        $i++;
                }
                return $pw;
        }

My questions is, if this is a good or bad way?


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