//定义编码

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

//Atom

header('Content-type: application/atom+xml');  

//CSS

header('Content-type: text/css');  

//Javascript

header('Content-type: text/javascript');  

//JPEG Image

header('Content-type: image/jpeg');  

//JSON

header('Content-type: application/json');  

//PDF

header('Content-type: application/pdf');  

//RSS

header('Content-Type: application/rss+xml; charset=ISO-8859-1');  

//Text (Plain)

header('Content-type: text/plain');  

//XML

header('Content-type: text/xml');  

//200 OK

header('HTTP/1.1 200 OK');  

//设置一个404头:

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

//设置地址被永久的重定向

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

//转到一个新地址

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

//文件延迟转向:

header('Refresh: 10; url=http://www.example.org/');

print 'You will be redirected in 10 seconds';  

//当然，也可以使用html语法实现

//<meta http-equiv="refresh" content="10;http://www.example.org/ />  

//override X-Powered-By: PHP:

header('X-Powered-By: PHP/4.4.0');

header('X-Powered-By: Brain/0.6b');  

//文档语言

header('Content-language: en');  

//告诉浏览器最后一次修改时间

$time = time() - 60; // or filemtime($fn), etc

header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');  

//告诉浏览器文档内容没有发生改变

header('HTTP/1.1 304 Not Modified');  

//设置内容长度

header('Content-Length: 1234');  

//设置为一个下载类型

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename="example.zip"');

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'); // 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"');

print 'Text that will be displayed if the user hits cancel or ';

print 'enters wrong login data';