protected function get_all_possible_id($suffix = "") { // Fetch one record, if there is and if this is first record: generate record; if (UserTable::isFirstStudent()) { $year = substr(date('Y'), 2, 4) - 8; $id_number = "0001" . "/" . $year; return $id_number; } else { $id_number = substr(mt_rand(), 0, 4) . "/" . substr(date('Y'), 2, 4); } return $id_number; }