Questions about namespace in binding facade

Question

Encountered this problem when binding facade

//Successful binding
Facade::bind('app\index\facade\Human','app\index\ Common\Human');

Facade::bind('app\index\facade\Human','\app\index\Common\Human');

//Failed binding Define
Facade::bind('\app\index\facade\Human','\app\index\Common\Human');

Xiaobai wants to know why the app is in front of the binding \ cannot be added. Doesn’t it mean starting from the root?

Answer 1

This is just like you use the "use" keyword to alias the referenced class. The default is to start from the root space,
For example:

namespace test;
use app\admin;

// 与下面写法是完全一样的

namespace test;
user \app\admin;

// 默认就是全局空间开始查找

If you want to understand Facade::bind() parameter, you can view the source code of the Facade class. In the source code, there is a detailed description of the bind() method