php namespace all files in directory

Question

Namespaces are declared using the namespace keyword. A file containing a namespace must declare the namespace at the top of the file before any other code - with one exception: the declare keyword.

php manual on namespaces definition

Is it possible to give an entire directory a namespace without the necessity to declare the namespace at the beginning of each individual file?

Answer 1

The direct answer is NO. You can declare multiple namespace for a single file but a single namespace cannot be declared to multiple file with a single line of statement. You have to do it in each files.

Answer 2

It is possible for all your classes within a directory to use the same namespace, but you still have to declare the namespace inside each class file, for example if you had a directory structure:

/App/Core/

All classes in that folder could have the same namespace:

FileA.php

<?php
namespace App\Core;
class FileA {}

FileB.php

<?php
namespace App\Core;
class FileB {}

Depending on the code editor you use, you may be able to automate the process of updating all files so you don't have to.