如下报错： 错误: could not find driver 行号: 4？

Question

<?phptry {$pdo="mysql:host=localhost;port=3306;dbname=huiyuanzhuce";$mypdo=new PDO($pdo,"root","root");$mypdo->exec("set names utf8");$sql="select * from zhuce where dg_username=?";$a=$mypdo->prepare($sql);$username='wangzhe';$a->execute(array($username));$res=$a->fetch();print_r($res);}catch (PDOException $e) { print "错误: ".$e->getMessage()."<br />"; print "行号: ".$e->getLine()."<br />"; die(); }?>

Answer 1

先执行phpinfo
看看，pdo有无开启，只有开启后，才能使用。

Answer 2

没开PDO 开PDO 。php,ini中找extension=php_pdo_mysql.dll 注释去掉就能了