slake-school-service/app/Http/Controllers/Admin/SigninQrController.php

<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Services\WeChatMiniProgramService;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Symfony\Component\HttpFoundation\Response as SymfonyResponse;

class SigninQrController extends Controller
{
    public function show(Request $request, WeChatMiniProgramService $wechat): Response|SymfonyResponse
    {
        $data = $request->validate([
            'code' => ['required', 'string', 'max:32'],
        ]);

        try {
            $page = (string) config('services.wechat.mini_program.checkin_page', 'subpkg/checkin/index');
            $png = $wechat->getUnlimitedWxaCode($page, $data['code']);

            return response($png, 200, [
                'Content-Type' => 'image/png',
                'Cache-Control' => 'private, max-age=300',
            ]);
        } catch (\Throwable $e) {
            return response()->json([
                'message' => $e->getMessage() ?: '生成小程序码失败',
            ], 422);
        }
    }
}