title: CodeIgniter, upload and config
body: <p>I'd like to config my upload using /config/upload.php. However, some of my config items will vary depending on the situation. In most cases, the upload directory is dynamically set (e.g. it incorporates the user's id, uses a random folder, etc.). Sometimes, the type of files that can be uploaded will be different (e.g. only photos in one case, only videos in another case).</p>
  
  <p>Can I put the general config items in /config/upload.php and add/override certain things later? If so, how?</p>