The Use Command and Namespaces in OOP in PHP

Let us have the following class Data:

<?php
	namespace \Core\Admin;
	
	class Data
	{
		public function __construct($num)
		{
			
		}
	}
?>

Let there also be a class Page that creates objects of the Data class inside itself:

<?php
	namespace Users;
	
	class Page
	{
		public function __construct()
		{
			$data1 = new \Core\Admin\Data('1');
			$data2 = new \Core\Admin\Data('2');
		}
	}
?>

As you can see, both of our classes are in completely different namespaces, so calls to the Data class cannot be simplified, similar to how we did it in the previous lesson. However, these calls are very long and inconvenient, because in each call to the Data class, its long namespace has to be specified.

To solve this problem, there is a special command use. Using this command, it is enough to connect the class by its full name once, and after that it will be possible to refer to this class simply by the class name. See the example:

<?php
	namespace Users;
	use \Core\Admin\Data; // connect the class
	
	class Page extends Controller
	{
		public function __construct()
		{
			$data1 = new Data('1'); // call simply by name
			$data2 = new Data('2'); // call simply by name
		}
	}
?>

Simplify the following code using use:

<?php
	namespace Project;
	
	class Test
	{
		public function __construct()
		{
			// Create 3 objects of the same class:
			$data1  = new \Core\Users\Data('user1');
			$data2  = new \Core\Users\Data('user3');
			$data3  = new \Core\Users\Data('user3');
		}
	}
?>

The following classes are given:

<?php
	namespace Core\Admin;
	
	class Controller
	{
		
	}
?>

<?php
	namespace Users;
	
	class Page extends \Core\Admin\Controller
	{
		
	}
?>

Simplify the class inheritance code by applying the use command.