header('Content-Transfer-Encoding: binary');
// load the file to send:
readfile('example.zip');
//
对当前文档禁用缓存
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');
//设置内容类型:
header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain');
//
纯文本格式
header('Content-Type: image/jpeg');
//JPG***
header('Content-Type: application/zip');
// ZIP
文件
header('Content-Type: application/pdf');
文件
header('Content-Type: audio/mpeg');
//
音频文件
header('Content-Type: application/x-shockw**e-flash');
//Flash
动画
//
显示登陆对话框
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Basic realm="Top Secret"');
'Text that will be displayed if the user hits cancel or ';
'enters wrong login data';