在zend中執行查詢返回null

Question

我直接在phpmyadmin中運行此查詢，它完全返回結果！ 但是當我在我的PHP腳本運行此查詢，它返回NULL

，這是我的DB類：

class Product extends Places_Db_Table_Row_Observable { 
    protected $_name = 'product'; 
    PUBLIC function getMaxSubcatProduct() 
    { 


     $query = $this->getAdapter()->query("select max(c) AS maxcount,id from (select COUNT(*) as c 
        ,product_sub_category_id as id from product group by product_sub_category_id) as max "); 
     $res = $query->fetchAll(); 
     return $res; 
    } 
} 

Answer 1

這是我的錯！我得到了下述結果在我的腳本是這樣的：

echo $this->masterMenu["id"]; 

但正確的做法是：

foreach ($this->masterMenu as $key => $value) 
        { 
         $masterMenu = $value['id']; 
        }