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                            要整合模型的事件處理，可以注冊一個模型觀察者。觀察者類里要設定對應模型事件的方法。例如，觀察者類里可能有 `creating`、 `updating `、 `saving `方法，還有其他對應模型事件名稱的方法：

例如，一個模型觀察者類可能看起來如下：

~~~
class UserObserver {
    public function saving($model)
    {
        //
    }
    public function saved($model)
    {
        //
    }
}
~~~

可以使用 observe 方法注冊一個觀察者實例：
~~~
User::observe(new UserObserver);
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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