x-39-php-9019/config/route.php

<?php
/**
 * This file is part of webman.
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the MIT-LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @author    walkor<walkor@workerman.net>
 * @copyright walkor<walkor@workerman.net>
 * @link      http://www.workerman.net/
 * @license   http://www.opensource.org/licenses/mit-license.php MIT License
 */

use Webman\Route;
require_once app_path('route.php');

Route::fallback(function(\support\Request $request){

    if ($request->expectsJson()) {
        return error('404 not found','','404');
    }
    return view('404', ['error' => 'some error'])->withStatus(404);
});