PHP header函数的用法

header('content-type:text/html;charset=utf-8');

header('HTTP/1.1 404 Not Found');

header('Refresh: 5; url=https://www.asen7.com/');  //5秒后跳转

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-cache, must-revalidate");

header("Pragma: no-cache");

header('HTTP/1.1 401 Unauthorized');

header('WWW-Authenticate: Basic realm="Top Secret"');