book_admin/application/common/service/AdminService.php

<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2018/11/22
 * Time: 下午4:57
 */

namespace app\common\service;

use app\common\model\VipAdminBind;

/**
 * 后台账号
 * Class AdminService
 * @package app\common\service
 */
class AdminService
{
    /**
     * @var AdminService
     */
    private static $self;

    /**
     * @return AdminService
     */
    public static function instance()
    {
        if(self::$self == NULL){
            self::$self = new self();
        }

        return self::$self;
    }

    /**
     * @return VipAdminBind
     */
    public function getVipAdminBindModel()
    {
        return model('VipAdminBind');
    }
}