php二维数组根据键值排序

php代码

    public function sort($arr,$sort,$v){    //$arr->数组   $sort->排序顺序标志   $value->排序字段

        if($sort == "0"){                   //排序顺序标志 SORT_DESC 降序；SORT_ASC 升序  
                $sort = "SORT_ASC";
        }elseif ($sort == "1") {
                $sort = "SORT_DESC";
        }
         
        foreach($arr as $uniqid => $row){  
            foreach($row as $key=>$value){                     
                    $arrsort[$key][$uniqid] = $value;
                }  
            }  
            if($sort){
            array_multisort($arrsort[$v], constant($sort), $arr);  
        }       
         return $arr;
    }