<?php
/**
 * Copyright (c) 2018.
 * Author: Igor Barkov <lopar.4ever@gmail.com>
 * Project name: Battles-Game
 */

class n
{
    private static $_instance = null;

    private function __clone() {}
    private function __construct() {}


    /**
     * @param $userId
     * @return null|string
     */
    public static function show($userId)
    {
        if (!self::$_instance) {
            self::$_instance = nick::search($userId);
        }
        return self::$_instance;
    }
}