我知道您正在尝试输出一些从PHP页面下载的流？

I understand that you're trying to output some stream for download from PHP page?

如果是这样，那么不要从包含HTML的页面输出该内容，而是重定向到仅输出下载流的单独的php页面，如果需要，则使用标题。

If so, then don't output that content from the page that contains HTML, but redirect to separate php page that outputs only the download stream, with headers if necessary.