php - Unknown: Failed opening required on line 0. laravel 5.6

Try to disable your anti-virus, this happens to me, it seems avast deletes my server.php.

So I added it to the exception

This error happens because the server.php file is missing. May be it is deleted or removed from your project directory. I have already faced this problem. Just add the server.php file at root of your project. You can add this file from any other laravel project directory or just create a file named server.php at root directory of your laravel project and paste the following code:

<?php

/**
 * Laravel - A PHP Framework For Web Artisans
 *
 * @package  Laravel
 * @author   Taylor Otwell <[email protected]>
 */

$uri = urldecode(
    parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)
);

// This file allows us to emulate Apache's "mod_rewrite" functionality from the
// built-in PHP web server. This provides a convenient way to test a Laravel
// application without having installed a "real" web server software here.
if ($uri !== '/' && file_exists(__DIR__.'/public'.$uri)) {
    return false;
}

require_once __DIR__.'/public/index.php';

This process works for me.