Laravel中BaseController名称前的\\是什么？

Question

I am new in Laravel, I am watching a video tutorial about Laravel, He made a controller and named that like below:

class AdminAuthController extends \BaseController{
   //Methods and codes goes here
}

What is \\ before BaseController?

Answer 1

它扩展了在全局名称空间中声明的BaseController。

Answer 2

The first Slash at the start of an object name references it's namespace location. Basically it being in the Global namespace in this case.

Answer 3

It looks for the BaseController in global namespace

http://php.net/manual/en/language.namespaces.global.php