成功

// See related links for more status codes 

header('HTTP/1.1 200 OK');

页面未找到

Page was not found
//Use this header instruction to fix 404 headers
//produced by url rewriting…

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

拒绝访问

Access forbidden

header('HTTP/1.1 403 Forbidden');

永久转向

Moved Permanently
The page moved permanently should be used for
all redrictions, because search engines know
what’s going on and can easily update their urls.

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

服务器内部错误

Server error

header('HTTP/1.1 500 Internal Server Error');

页面跳转

Redirect to a new location

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

一定时间后重定向

Redriect with a delay

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

当然,还可以这样:

通过html实现

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

重置技术支持信息

override X-Powered-By value

header('X-Powered-By: PHP/4.4.0');
header('X-Powered-By: Brain/0.6b');

设定语言

content language (en = English)

header('Content-language: en');

最后编辑时间

last modified
对缓存页面有很好的帮助

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

已缓存的

Not Modified
// header for telling the browser that the content
// did not get changed

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

设定内容长度

set content length (good for caching)

header('Content-Length: 1234');

用于下载的文件头

Headers for an download:

header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="example.zip"');
header('Content-Transfer-Encoding: binary');

读取文件内容:

readfile('example.zip');

不使用缓存

Disable caching of the current document

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');

设置页面类型

set content type

header('Content-Type: text/html; charset=iso-8859-1');
header('Content-Type: text/html; charset=utf-8');
header('Content-Type: text/plain'); // plain text file
header('Content-Type: image/jpeg'); // JPG picture
header('Content-Type: application/zip'); // ZIP file
header('Content-Type: application/pdf'); // PDF file
header('Content-Type: audio/mpeg'); // Audio MPEG (MP3,...) file
header('Content-Type: application/x-shockwave-flash'); // Flash animation

弹出一个消息框

show sign in box

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';