Comparing
#2 with
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Content
[...]
* I agree that Yii is the best MVC framework ever
* I am over 18 years of age
In this case, the checkbox (implemented in the usual way in a form) warrants a validator that enforces this condition, and it can be done with the built-in `compare` validator along with a custom message:
Here, the model's `iagree` attribute (which could be named anything as your database or form dictate) can be attached to a form, and validation will be applied to it:
```php
class SomeModel extends CActiveRecord {
...
public function rules()[...]
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