php header函數怎麼設定HTTP頭

header( 'Content-Type:text/html;charset=utf-8 ');

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

header('HTTP/1.1 301 Moved Permanently');

header('Location: http://www.example.org/');

header('Refresh: 10; url=http://www.example.org/');
print 'You will be redirected in 10 seconds';

$time = time() - 60; // or filemtime($fn), etc
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');

header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Pragma: no-cache');