title: Virtual file system in php?
body: <p>We have a system where, a large part of it is the ability to upload and download files if you are logged in and have the correct permissions.</p>
  
  <p>What we are looking at doing to help with the organization from the users point of view is having a virtual file system type layout.</p>
  
  <p>Even if (or even preferably) all the users files are actually just stored in one directory, and the virtual file system is just a screen put up from the database.</p>
  
  <p>What we are wondering before we invest in creating this is if this already exists somewhere, open source (but able to be used in commercial software), free, or paid (first two preferably!).</p>