我想知道为什么我的index.php内容文件不正确，特别是在注册自动加载器时。我读了
|------------------------------------------------------------------------
--
| Register The Auto Loader
|------------------------------------------------------------------------
--
|
| Composer provides a convenient, automatically generated class loader
for
| our application. We just need to utilize it! We'll simply require it
| into the script here so that we don't have to worry about manual
| loading any of our classes later on. It feels great to relax.
|
*/
require __DIR__.'/../projectlaravel2/vendor/autoload.php';
虽然其他人（在Youtube教程中教授如何托管网站）
require __DIR__.'/../projectlaravel2/bootstrap/autoload.php';
每当我尝试访问我的域名时，我总会收到错误：
PHP Fatal error: require(): Failed opening required
'/home/aldohasi/projectlaravel3/vendor/composer/../symfony/polyfill-
mbstring/bootstrap.php'(include_path='.:/opt/alt/php56/usr/share/pear:/opt/alt/php56/usr/share/php') in /home/aldohasi/projectlaravel3/vendor/composer/autoload_real.php on line 66
我确实在我的vendor文件夹中找到了自动加载器文件，并尝试将其移动到bootstrap文件夹，将index.php中的vendor更改为bootstrap。我仍然得到同样的错误。有什么想法吗？