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                            ### 過濾條件
* * * * *
當 WHERE 條件來自于用戶的輸入時，你通常需要忽略用戶輸入的空值。 例如，在一個可以通過用戶名或者郵箱搜索的表單當中，用戶名或者郵箱 輸入框沒有輸入任何東西，這種情況下你想要忽略掉對應的搜索條件， 那么你就可以使用 yii\db\Query::filterWhere() 方法來實現這個目的：

~~~
// $username 和 $email 來自于用戶的輸入
$query->filterWhere([
    'username' => $username,
    'email' => $email,		
]);
~~~
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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