RailwayTwo/app/Http/Controllers/WechatController.php

<?php

namespace App\Http\Controllers;

use App\Models\User;
use App\Models\WechatInfo;

class WechatController extends Controller
{
    public function index()
    {
        $wechat_user = session('wechat.oauth_user.default');
        if($wechat_user && isset($wechat_user['original'])) {
            $official_open_id = $wechat_user['original']['openid'];
            $union_id = $wechat_user['original']['unionid'];
            WechatInfo::firstOrCreate([
                'official_open_id' => $official_open_id,
                'union_id' => $union_id
            ]);
            User::where('union_id', $union_id)->update(['official_open_id' => $official_open_id]);
            return '授权成功';
        }
        return '授权失败';
    }
}