Content-Type

EXCEL导出场景

查询结果导出到Excel：
header( "Content-Type: application/vnd.ms-excel">

浏览器打开/保存的对话框：
Content-Disposition参数：
attachment --- 作为附件下载
inline --- 在线打开

header("Content-Disposition: inline; filename=文件名.mp3");
Header("Content-Disposition：attachment;filename=test.xls");

注：IE是根据Content-Disposition中filename这个段中文件名的后缀来识别这个文件类型的，所以，
如果有很多种文件类型的时候，可以将Content-Type设置为二进制模式的：

 Header("Content-type:   application/octet-stream");

附录：

mimetypes = array('doc'        => 'application/msword','bin'        => 'application/octet-stream','exe'        => 'application/octet-stream','so'        => 'application/octet-stream','dll'        => 'application/octet-stream','pdf'        => 'application/pdf','ai'        => 'application/postscript','xls'        => 'application/vnd.ms-excel','ppt'        => 'application/vnd.ms-powerpoint','dir'        => 'application/x-director','js'        => 'application/x-javascript','swf'        => 'application/x-shockwave-flash','xhtml'        => 'application/xhtml+xml','xht'        => 'application/xhtml+xml','zip'        => 'application/zip','mid'        => 'audio/midi','midi'        => 'audio/midi','mp3'        => 'audio/mpeg','rm'        => 'audio/x-pn-realaudio','rpm'        => 'audio/x-pn-realaudio-plugin','wav'        => 'audio/x-wav','bmp'        => 'image/bmp','gif'        => 'image/gif','jpeg'        => 'image/jpeg','jpg'        => 'image/jpeg','png'        => 'image/png','css'        => 'text/css','html'        => 'text/html','htm'        => 'text/html','txt'        => 'text/plain','xsl'        => 'text/xml','xml'        => 'text/xml','mpeg'        => 'video/mpeg','mpg'        => 'video/mpeg','avi'        => 'video/x-msvideo','movie'        => 'video/x-sgi-movie',
);

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