Fatal error: Uncaught Error: Call to undefined function app\controller\response() in /home/www/www.ruipeier.com.cn/app/controller/Sitemap.php:41 Stack trace: #0 /home/www/www.ruipeier.com.cn/vendor/think/App.php(37): app\controller\Sitemap->xml() #1 /home/www/www.ruipeier.com.cn/public/index.php(23): think\Http->run() #2 {main} thrown in /home/www/www.ruipeier.com.cn/app/controller/Sitemap.php on line 41