//okheader(‘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// // 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), etcheader(‘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 pastheader(‘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';