Reading the Yii doc ------------------ #### What to read: Almost all the information you need whilest working with yii areis written in the [Class Reference](http://www.yiiframework.com/doc/api/). The point is just to know how to find out themwhat you need. ForTo find this information, you have to understand what is Yii::app() and what is "this" in the context in wich you are.

#### Yii::app(): your best friend during programming

In each point of your application code (view, controller, widget, model, module) you can call Yii:app().