Comparing
#5 with
#7
Content
[...]
For example, [enabling gzip](http://www.yiiframework.com/doc/cookbook/39/) compression on the output could be done via extending CWebApplication. But because there are entry points for event handlers, one can do this:
```php
Yii::app()->onbBeginRequest = create_function('$event', 'return ob_start("ob_gzhandler");'),
Yii::app()->on
eEndRequest = create_function('$event', 'return ob_end_flush();'),
```[...]
So, in this case, you are extending the functionality of an object with functionality of another object.
After studying this cookbook page you are encouraged to reread the [corresponding guide page](http://www.yiiframework.com/doc/guide/basics.component) as it contains advanced information (for example, if you are familiar with interfaces, you might find it enough to implement IBehavior before extending CBehavior).
- Russian version: [Поведение и события](http://phptime.ru/blog/yii/31.html)
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