O Guia Definitivo do Yii 1.1

forum/
ForumModule.php
components/
views/
controllers/
DefaultController.php
extensions/
models/
views/
layouts/
default/
index.php
the module class file
containing reusable user components
containing view files for widgets
containing controller class files
the default controller class file
containing third-party extensions
containing model class files
containing controller view and layout files
containing layout view files
containing view files for DefaultController
the index view file
A module must have a module class that extends from CWebModule. The class name is
determined using the expression ucfirst($id).'Module', where $id refers to the module ID
(or the module directory name). The module class serves as the central place for storing
information shared among the module code. For example, we can use
CWebModule::params to store module parameters, and use CWebModule::components to
share application components at the module level.
Tip: We can use the module generator in Gii to create the basic skeleton of a new
module.
Using Module
To use a module, first place the module directory under modules of the application base
directory. Then declare the module ID in the modules property of the application. For
example, in order to use the above forum module, we can use the following application
configuration:
return array(
......
'modules'=>array('forum',...),
......
);
A module can also be configured with initial property values. The usage is very similar to
configuring application components. For example, the forum module may have a property
named postPerPage in its module class which can be configured in the application
configuration as follows: