php常见的header操作

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

header ("HTTP/1.1 301 Moved Permanently"); 
header ("Location:http://www.baidu.com");

header ('Content-type: application/file');
header ("Content-Disposition: attachment; filename='test.file'");
readfile ("test.file");

header('Access-Control-Allow-Origin:*');

header('Access-Control-Allow-Headers:WWW-Authenticate,Authorization,Set-Cookie,X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version,name');