《三》關注時生成關注者的永久二維碼

參考文檔：https://github.com/overtrue/wechat/wiki/%E4%BA%8C%E7%BB%B4%E7%A0%81

<?php namespace App\Http\Controllers\home;

use App\Http\Models\home\Users;
use App\Http\Requests;
use App\Http\Controllers\Controller;

use Overtrue\Wechat\Server;
use Overtrue\Wechat\User as WxUser;
use Overtrue\Wechat\QRCode;

class WxController extends Controller {
    public function index()
    {
        //$encodingAESKey 可以爲空
        $server =new Server(env('WX_APPID'),env('WX_TOKEN'));
        // 只監聽指定類型事件
        $server->on('event', 'subscribe',[$this,'guanzhu']);
        //取消關注
        $server->on('event', 'unsubscribe',[$this,'qxgz']);
        //
        return $server->serve();
    }
    //@關注方法。
    public function guanzhu($event)
    {
        $wxuser=new WxUser(env('WX_APPID'),env('WX_SEC'));
        $wx_res=$wxuser->get($event->FromUserName);
        //寫入數據庫
        $user=new Users();
        $user->openid=$event->FromUserName;
        $user->name=$wx_res->nickname;
        $user->subtime=time();
        $user->save();
        //二維碼操作
        $this->qr($user->uid);
        //返回信息
        return '感謝您的關注。';
    }
    //@二維碼操作
    public function qr($uid){
        //file_get_contents https的網址,allow_url_include 要爲 on
        ini_set('allow_url_include','on');
        //開始生成場景二維碼
        $qrcode = new QRCode(env('WX_APPID'),env('WX_SEC'));
        $result = $qrcode->forever($uid);
        $ticket = $result->ticket;
        //下載二維碼
        $_path=$this->mkd().'/'.'qr_'.$uid.'.jpg';
        $qrcode->download($ticket,$_path);
    }
    //@創建保存二維碼目錄
    protected function mkd(){
        $path=public_path().date('/Y/md');
        if(!file_exists($path)){
            mkdir($path,0777,true);
        }
        return $path;
    }
    //@取消關注
    public function qxgz($event)
    {
        //獲得取消用戶的 openid
        $open_id=$event->FromUserName;
        //取得用戶信息
        $user_one=Users::where('openid',$open_id)->first();
        //拼接關注時的二維碼路徑
        $_path=str_replace('\\','/',public_path()).date('/Y/md').'/'.'qr_'.$user_one->uid.'.jpg';
        //判斷並刪除
        if(file_exists($_path)){
            unlink($_path);
        }
        //清空信息變量
        unset($user_one);
        //刪除對應用戶信息
        Users::where('openid',$open_id)->delete();
    }
}

生成後保存在：

結束。