在模型本身中添加yii2事件处理程序

use yii\db\ActiveRecord;

class MyModel extends ActiveRecord
{
    // 模型的属性和方法
}

use yii\db\ActiveRecord;

class MyModel extends ActiveRecord
{
    const EVENT_MY_CUSTOM_EVENT = 'myCustomEvent';

    public function init()
    {
        parent::init();

        // 绑定事件处理程序
        $this->on(self::EVENT_BEFORE_INSERT, [$this, 'myBeforeInsertHandler']);
        $this->on(self::EVENT_AFTER_INSERT, [$this, 'myAfterInsertHandler']);
        $this->on(self::EVENT_MY_CUSTOM_EVENT, [$this, 'myCustomEventHandler']);
    }

    public function myBeforeInsertHandler($event)
    {
        // 在插入数据之前执行的逻辑
    }

    public function myAfterInsertHandler($event)
    {
        // 在插入数据之后执行的逻辑
    }

    public function myCustomEventHandler($event)
    {
        // 自定义事件处理程序
    }
}

$model = new MyModel();

// 触发内置事件
$model->trigger(MyModel::EVENT_BEFORE_INSERT);
$model->trigger(MyModel::EVENT_AFTER_INSERT);

// 触发自定义事件
$model->trigger(MyModel::EVENT_MY_CUSTOM_EVENT);