$pdo = new PDO($dsn,$username,$password);
var_dump($pdo);//??? object(PDO)#1 (0) { }
//?? ? ??
$sql = "id=5? ?? ??? ?? age=age+1 ????";
$records = $pdo->exec($sql);
var_dump($records);
0
0
0
![[? ?????] Node.js ?? ??](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
