PHP语句实现301跳转

<?php
header('HTTP/1.1 301 Moved Permanently');

header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');

header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
//http://my.oschina.net/cart/
header('Location: http://www.baidu.com/');
exit;