php对数组中指定键值排序

 function array_sort($arr,$keys,$type='asc'){

         $keysvalue = $new_array = array();

         foreach ($arr as $k=>$v){

             $keysvalue[$k] = $v[$keys];

         }

         if($type == 'asc'){

             asort($keysvalue);

         }else{ 

             arsort($keysvalue);

         }

         reset($keysvalue);

         foreach ($keysvalue as $k=>$v){

             $new_array[$k] = $arr[$k];

         }

         return $new_array;

     }