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As seen in this post, Yii doesn't enforce how language is set and maintained within the session.

In case of a multilingual application, one might consider it a reasonable approach to store the preferred language of the user in a session variable, and after that, every time a page is requested, to check this session variable and render the page in the indicated language. This tutorial shows a Yii-way of doing this. We implement an event handler for the onBeginRequest event; as the name of the event suggests, this event handler will be called at the beginning of each request, so its a good place to check whether a language is provided (via post, session or cookie) and set the application language accordingly. We also implement a simple Language-Selector Widget, which can render the language options as ajax-links or as a drop-down list.

This little tutorial explains a way how you can retrieve more parameters from Yii::app()->user by adding a component that extends CWebUser and retrieves the user information from database table named User.

This example uses a MySQL DB with a table named tree with the fields id, name, and parent_id. The parent_id will be NULL for root elements. The SQL is kept simple (no autoinc, no FK, etc).

Sometimes we get lost trying to search by a HAS_MANY relation using CActiveRecord or CActiveDataProvider. This article is a series of drills that try to describe the practical techniques of searching by a HAS_MANY relation.

Because Yii intends to be integrated nicely with third-party libraries, it does not define any global functions. Everything in Yii needs to be addressed with full class name or object scopes. For example, to access the current user, we need to use Yii::app()->user; to access application parameters, we need Yii::app()->params['name']; and so on. While editors like textmate can help alleviate the problem of these lengthy typings, it is worthwhile to define global shortcut functions to some commonly used method calls. They will make the application code look cleaner.

"By Example" cookbook pages will provide coding examples for many of the commonly used classes within Yii. We will try to provide as many usage examples as possible for keep these pages as helpful as possible.

The easiest way to update content in AJAX is to use the renderPartial method.

A few days ago, i worked for CGridView exporting functional for my client. He asked me to create a simple exporting to a CSV file a CGridView search results.

Note: Please also take a look at the newer EMenu extension. This works even better that the deprecated CDropDownMenu!