wechat-vote/app/Http/Controllers/WechatController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class WechatController extends Controller
{
    /**
     * 处理微信的请求消息
     *
     * @return string
     */
    public function serve()
    {
        //Log::info('request arrived.'); # 注意：Log 为 Laravel 组件，所以它记的日志去 Laravel 日志看，而不是 EasyWeChat 日志

        $wechat = app('wechat');
        $wechat->server->setMessageHandler(function($message){
            return "感谢你的关注-微信投票";
        });

        //Log::info('return response.');

        return $wechat->server->serve();
    }
}