php二维数组根据键值排序

 
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;
}