Cannot find Class with PHP Namespace

Question

I posted some questions previously regarding the use of Namespaces in PHP and from what I got, this example code I have below should be working.

However I am getting

Answer 1

Strangely I have found that in my example code from the Question above, if I change all the Namespace's that are defined to something like MyLibrary so it would be like this code below...

E:\Library\Registry.class.php File

Then when I use use MyLibrary\Registry; in another file, I am able to access it how I had planned...

$this->registry = new Registry;

The reason this is very strange to me is this now makes a class name appear to be a Namespace as well. So I would not need to set a Namespace to 'MyLibrary\Library' to access the Registry instead I would do it like I showed in this answer to be able to access it with just calling the name of the class.

I hope this makes sense and helps someone else. I will not accept this as the answer as I am hoping someone with more know-how will come in and post a better Answer with explanation