lw_test/app/mobile/controller/Soldier.php

<?php

namespace app\mobile\controller;

use app\mobile\MobileBaseController;

class Soldier extends MobileBaseController
{
    public function login()
    {
        return view();
    }

    public function doLogin()
    {
        $param = input('post.');
        if (empty($param['mobile']) || empty($param['password'])) {
            ajax_return(1,'请输入账号或密码');
        }
    }
}