浏览器如何弹出下载框

php的header函数之设置content-type

    //定义编码
    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‘);  

    //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
    // <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), etc
    header(‘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 past
    header(‘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‘;  

下载xlsx文件

    $filename = rtrim($_SERVER[‘DOCUMENT_ROOT‘],‘/‘).‘/app/files/payment_status.csv‘;
    header(‘Content-Disposition: attachment; filename=payment_status.xlsx‘);
    header(‘Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet‘);
    header(‘Content-Length: ‘ . filesize($filename));
    header(‘Content-Transfer-Encoding: binary‘);
    header(‘Cache-Control: must-revalidate‘);
    header(‘Pragma: public‘);
    readfile($filename);  

https://stackoverflow.com/questions/17770517/php-content-disposition-attachment-content-type