function generatePassword ($length = 6)

{

    $password = "";

    $possible = "2346789BCDFGHJKLMNPQRTVWXYZ";

    $maxlength = strlen($possible);



    if ($length > $maxlength) {

        $length = $maxlength;

    }



    $i = 0;

    while ($i < $length) {

        $char = substr($possible, mt_rand(0, $maxlength-1), 1);



        if (!strstr($password, $char)) {

            $password .= $char;

            $i++;

        }

    }

    return $password;

}