除了连接mysql，php怎么连接pdo数据库呢

<?php $db = new PDO("mysql:host=localhost;dbname=baname","root",""); $db->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER); $db->query("set names utf8"); $sql="select * from register where id>980"; $result=$db->query($sql); $result->setFetchMode(PDO::FETCH_ASSOC); $rs = $result->fetchAll(); print_r($rs); ?>