PHP: using sub-namespace class inside a namespace

Question

Suppose I have a top-level namespace \Outer and I have another sub-namespace \Outer\Inner and I have another top-level namespace \Inner

and in a class in \Outer I use Inner like this

use Inner;

then which Inner will be used?

\Outer\Inner // ( sub-namespace )

or the

\Inner  // ( top-level namespace )

I am confused because php said that the \ was optional for top-level namespaces?

use Inner and use \Inner both are different. First one is sub-namespace of Outer namespace but later one is top-level namespace — Hari Darshan
– Hari Darshan, Commented Jan 27, 2016 at 7:27
Possible duplicate of How to implement nested namespace in PHP? — Narendrasingh Sisodia
– Narendrasingh Sisodia, Commented Jan 27, 2016 at 9:07

Eric K · Accepted Answer · 2018-11-08 17:50:20Z

1

When you have namespace \Outer in a class, then use Inner is going to be using Inner top-level namespace. If you want to use subnamespace you should use \Outer\Inner

As stated in php using namespaces

Lets say your first file was:

<?php
namespace Outer\Inner;

<?php
 namespace Outer;

/* Qualified name */
Inner\foo(); // resolves to function Outer\Inner\foo

edited Nov 8, 2018 at 17:50

Eric K

72610 silver badges26 bronze badges

answered Jan 27, 2016 at 7:48

aphodius

1,24919 silver badges33 bronze badges

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