文件下载强制保存，不直接打开，php响应头

header('Content-Description: File Transfer');
header('Cache-Control: private, must-revalidate,
post-check=0, pre-check=0, max-age=1');

//header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');

// force download dialog
if (strpos(php_sapi_name(), 'cgi') === false) {
    header('Content-Type: application/force-download');
    header('Content-Type: application/octet-stream', false);
    header('Content-Type: application/download', false);
    header('Content-Type: application/pdf', false);
} else {
    header('Content-Type: application/pdf');
}


// use the Content-Disposition header to supply a recommended filename
header('Content-Disposition: attachment; filename="'.basename($name).'";');
header('Content-Transfer-Encoding: binary');

//----- 如果有插件支持， 则在浏览器直接打开的php响应头 -----
header('Content-Type: application/pdf');
header('Cache-Control: private, must-revalidate,
post-check=0, pre-check=0, max-age=1');
//header('Cache-Control: public, must-revalidate, max-age=0'); // HTTP/1.1
header('Pragma: public');
header('Expires: Sat, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
header('Content-Disposition: inline; filename="'.basename($name).'";');