获取的二维数组排序

//排序
            $sort = array(  
            'direction' => 'SORT_DESC', //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序  
            'field'     => 'ztz',       //排序字段  
            );  
            $arrSort = array();  
            foreach($arr AS $uniqid => $row){  //需要排序的数组$arr
                foreach($row AS $key=>$value){  
                    $arrSort[$key][$uniqid] = $value;  
                }  
            }  
            if($sort['direction']){  
                array_multisort($arrSort[$sort['field']], constant($sort['direction']), $arr);  
            }  

已经获取的二维数组排序