public function validate_username(Module_Guestbook $m, $arg) { $arg = $_POST['username'] = trim($arg); $max = $m->cfgMaxUsernameLen(); $len = GWF_String::strlen($arg); if ($len < 1 || $len > $max) { return $m->lang('err_gbm_username', array(1, $max)); } return false; }