PHP创建的ZIP文件无法使用Windows资源管理器

I have the following code which works fine on windows with WinRAR and works fine on Mac's as well. However, for some reason, when you open it with the default windows Explorer, the zip appears empty and when you right click and extract, it says it is invalid. When the same one is opened with winrar or on a mac, all the files are there. Any ideas?I have the following code which works fine on w