在PHP中可以通過header函數來發送頭信息，還可以設置文件的content-type，下面整理了一些常見文件類型對于的content-type值。

//date 2015-06-22

//定義編碼

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');

//設置一個404頭:

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

//設置地址被永久的重定向

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

//轉到一個新地址

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

//文件延遲轉向:

header('Refresh: 10; url=http://www.example.org/');

print 'You will be redirected in 10 seconds';

//當然，也可以使用html語法實現

// <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');

//文檔語言

header('Content-language: en');

//告訴瀏覽器最后一次修改時間

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

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

//告訴瀏覽器文檔內容沒有發生改變

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

//設置內容長度

header('Content-Length: 1234');

//設置為一個下載類型

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');

// 對當前文檔禁用緩存

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');

//設置內容類型:

header('Content-Type: text/html; charset=iso-8859-1');

header('Content-Type: text/html; charset=utf-8');

header('Content-Type: text/plain'); //純文本格式

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'); // 音頻文件

header('Content-Type: application/x-shockw**e-flash'); //Flash動畫

//顯示登陸對話框

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';

以上所述就是本文的全部內容了，希望大家能夠喜歡。