1$sql="SELECT 1 as a;";2$stmt=$pdo->prepare($sql);3$stmt->execute([]);4$sql="SELECT 2 as b;";5$stmt=$pdo->prepare($sql);6$stmt->execute([]);7$sql="SELECT 3 as c;";8$stmt=$pdo->prepare($sql);9$stmt->execute([]);10$rows=$stmt->fetchAll(PDO::FETCH_ASSOC);11print_r($rows);