foreach ($pp2Results as $value) {
            $pp1Results = $database->fetchAll("SELECT * FROM 'results' WHERE name = ? AND surname = ? AND birth_date = ?", $value['name'], $value['surname'],     $value['birth_date']);

            if (!empty($pp1Results)) {
                $pp2Results = [];
                foreach ($pp1Results as $key => $resultValue) {
                    $pp2Results['results'][$key]['id'] = $resultValue->id;
                    $pp2Results['results'][$key]['result'] = $resultValue->result;
                }
            }
        }