描述如下
$info = get_headers($url, true); // $url就是文件的全路径 注意是全路径 get_headers函数会打印出oss文件的详细信息
$size = $info['Content-Length'];
header("Content-type:application/octet-stream");
header("Content-Disposition:attachment;filename = " . $origin_name);
header("Accept-ranges:bytes");
header("Accept-length:" . $size);
readfile($url);