In PHP's Yii framework, a behavior is a reusable code fragment that can be attached to a model or component to extend its functionality. Behaviors provide a convenient way to add new functionality and logic without modifying the original code. This article explains in detail how to define and bind behaviors, and provides corresponding source code examples.
1. Definition of behavior
In the Yii framework, behavior is yii\base\Behaviordefined by inheriting classes. To define a behavior, you need to create a new class, extend Behaviorthe class, and implement the corresponding methods.
Here is a simple behavioral example, named TimestampBehavior, for automatically setting the creation time and update time before the model is saved:
namespace app\behaviors;
use yii\base\Behavior;
use yii\db