Yesterday I've written a module for myself. Just an experiment. When I was feeling satisfied, I've created a repository on github, and pushed my code. My module and yii are on github. So I'll show you a "new" way to start our yii projects.
Uploading files in a webapp can be extremely tricky and sometimes the quickest way to do it is to store the file directly in the webserver or into a DNS (like Amazon S3) and then to save the link and the metadata inside a table in the DB. The thing is that you'll have to deal with file permissions, server storage, file management and so on (which is perfectly fine, by the way).
This article is based on fr0d0z's article Integrating Wordpress and Yii: still another approach, using Yii as the router/controller and provides more details on how to set up this integration.To be more specific,the idea is not to use any main.php layout in Yii's controllers.This gives the advantage that we do not need to modify any Yii code when we switch a theme in WordPress admin panel,provided we have done a very basic setup which I explain below.