PDO 连接数据表

header("Content-Type:text/html;charset=utf8");
$dsn = "mysql:host=localhost;dbname=test;";
$db = new PDO($dsn, 'root', 'root',array(PDO::MYSQL_ATTR_INIT_COMMAND => "set names utf8"));
$db->setAttribute(PDO::ATTR_CASE, PDO::CASE_UPPER);
$rs = $db->query("SELECT * FROM foo");
$rs->setFetchMode(PDO::FETCH_ASSOC);
$result_arr = $rs->fetchAll();
echo "<pre>";
print_r($result_arr);