<?php
header('content-type:text/html;charset=utf8');
/**
* Created by PhpStorm.
* User: Administrator
* Date: 2015/8/30 0030
* Time: 下午 22:56
*/
//連接
try{
? ?$dsn="mysql:host=localhost,dbname=test";
? ?$username='root';
? ?$passwd=123456;
? ?$pdo=new PDO($dsn,$username,$passwd);
? ?var_dump($pdo);
}catch (PDOException $e){
? ?echo $e->getMessage();
}

？>

錯誤提示

Warning: PDO::__construct(): in?E:\xampp\htdocs\PDO\mysqli-pdo-connect.php?on line?14
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: ?????????????????