I'm currently working on a project where I have to be able to convert several different image types as they're uploaded to one single image type, so that they can be transformed into thumbnails, be viewed in the browser, and have the original zipped for download. I know how to do a few file types with functions I've found for .jpgs and .pngs, etc., but I'm going to have to be able to support file types such as illustrator .eps files etc. Can anybody point me in the right direction for some PHP resources if it's possible to do this?