laravel门面类的代码提示方案：
https://github.com/barryvdh/laravel-ide-helper

按照步骤安装
1、composer require barryvdh/laravel-ide-helper
2、添加下面这行到config\app.php的providers数组项中
Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider::class,
3、php artisan ide-helper:generate
这时候报错
[Symfony\Component\Console\Exception\CommandNotFoundException]
There are no commands defined in the "ide-helper" namespace.

php artisan clear-compiled
php artisan optimize
都没用
最后是运行
php artisan config:clear

再执行php artisan ide-helper:generate就成功了