header功能太多了

<?php

// fix 404 pages:

header('HTTP/1.1 200 OK');

// set 404 header:

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

// set Moved Permanently header (good for redrictions)

// use with location header

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

// redirect to a new location:

header('Location: http://www.jbxue.com/');

// redrict with delay:

header('Refresh: 10; url=http://www.jbxue.com/'); //十秒后进入www.jsxue.com网站

print 'You will be redirected in 10 seconds';

// you could also use the HTML syntax://

// override X-Powered-By: PHP:

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

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

// content language (en = English)

header('Content-language: en');

// last modified (good for caching)

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

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

// header for telling the browser that the content

// did not get changed

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

// set content length (good for caching):

header('Content-Length: 1234');

// Headers for an download:

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');

// 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 pastheader('Pragma: no-cache');

// 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// 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';

补充：Web开发 , php ,