<?php
 /**
  * Created by PhpStorm.
  * User: roy
  * Date: 05/03/2019
  * Time: 16:08
  */
 class Tri{
 
     public static function cmpVlanInArray($a, $b)
     {
         return Tri::cmp($a["n_vlan"], $b["n_vlan"]);
     }
 
     public static function cmp($a,$b){
         if ($a == $b) {
             return 0;
         }
         return ($a < $b) ? -1 : 1;
     }
 }