linkDB(); $sql = "SELECT k.*, o.stadt, o.strasse, o.plz FROM kurs k JOIN ort o ON k.ort_id = o.id WHERE k.id = :id"; $sth = $pdo->prepare($sql); $sth->execute([':id' => $id]); $result = $sth->fetch(\PDO::FETCH_ASSOC); return $result ?? null; } }