[b]//定义编码  [/b]header( 'Content-Type:text/html;charset=utf-8 ');  [b]//Atom  [/b]header('Content-type: application/atom+xml');  [b]//CSS  [/b]header('Content-type: text/css');  [b]//Javascript  [/b]header('Content-type: text/javascript');  [b]//JPEG Image  [/b]header('Content-type: image/jpeg');  [b]//JSON  [/b]header('Content-type: application/json');  [b]//PDF  [/b]header('Content-type: application/pdf');  [b]//RSS  [/b]header('Content-Type: application/rss+xml; charset=ISO-8859-1');  [b]//Text (Plain)  [/b]header('Content-type: text/plain');  [b]//XML  [/b]header('Content-type: text/xml');  [b]// ok[/b]  header('HTTP/1.1 200 OK');  [b]//设置一个404头:  [/b]header('HTTP/1.1 404 Not Found');  [b]//设置地址被永久的重定向  [/b]header('HTTP/1.1 301 Moved Permanently');  [b]//转到一个新地址[/b]  header('Location: http://www.example.org/');  [b]//文件延迟转向:  [/b]header('Refresh: 10; url=http://www.example.org/');  print 'You will be redirected in 10 seconds';  [b]//当然，也可以使用html语法实现  [/b]// <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');  [b]//文档语言  [/b]header('Content-language: en');  [b]//告诉浏览器最后一次修改时间  [/b]$time = time() - 60; // or filemtime($fn), etc  header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');  [b]//告诉浏览器文档内容没有发生改变  [/b]header('HTTP/1.1 304 Not Modified');  [b]//设置内容长度  [/b]header('Content-Length: 1234');  [b]//设置为一个下载类型[/b]  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');  [b]// 对当前文档禁用缓存[/b]  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');  [b]//设置内容类型:  [/b]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  [b]//显示登陆对话框[/b]  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';