链接PDO

header('Content-type:text/html;Charset=utf-8');
/**
 * 实例化PDO对象
 */
// 1, 设置相关的参数
// 1.1 确定数据源
$dbms = 'mysql';
$host = 'localhost';
$port = '3306';
$dbname = 'jf';
$charset = 'utf8';
$dsn = "$dbms:host=$host;port=$port;dbname=$dbname;charset=$charset";
// 1.2 确定用户名和密码
$user = 'root';
$pass = '123456';
// 2, 实例化PDO类
$pdo = new PDO($dsn, $user, $pass);
var_dump($pdo);