CampSession::generateToken PHP Method

    function generateToken()
    {
        $length = 32;
        $values = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $token = '';
        for ($i = 0; $i < $length; $i++) {
            $token .= substr($values, rand(0, strlen($values) - 1), 1);
        }
        return $token;
    }