如何为LAMP Web应用程序优化此导出功能？

I have a feature which allows the user to create projects and view it on this page. They could import resources(pdf,img,etc) to be kept along with their projects. So now i want to create a feature which allows the user to export all their stuff and those people who are in the same group as them all neatly with pretty ribbon tied in a zip file.I have a feature which allows the user to creat