PHP 使用header函数设置HTTP头的示例解析 表头

如下所示：

//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'); 

// 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';