How to use namespace properly in PHP? - php

Question

I have this file root/core/Router.php
<?php
namespace Core;
class Router {
protected $url;
protected $controller;
private function parseURL() {
// threat the $this->url; for example ["r", "product"]
}
private function request() {
$this->controller = Controller::get($this->url[1]);
}
public function __construct() {
$this->parseURL();
$this->request();
}
}
?>
then file root/core/Controller.php
<?php
namespace Core;
class Controller {
public static function model($name, $params = []) {
$model = "\\Model\\$name";
return new $model($params);
}
public static function view($name, $params = []) {
require_once APP_DIR . "view/" . $name . ".php";
}
public static function get($name, $params = []) {
require_once APP_DIR . "controller/" . $name . ".php";
$name = "\\Controller\\$name";
return new $name($params);
}
}
?>
then root/controler/Product.php
<?php
namespace Controller;
use Core\Controller;
use Model\Product;
class Product {
public function get() {
$ret['state'] = 510;
$productModel = new Product;
$products = $productModel->getAll();
if(isset($products)) {
$ret['products'] = $products;
$ret['state'] = 200;
}
return $ret;
}
}
?>
then file root/model/Product.php
<?php
namespace Model;
class Product {
public function add($values) {
return Database::insert("product", $values);
}
}
?>
and root/core/Model.php
<?php
namespace Core;
class Model {
protected $table = null;
public function getAll() {
// some code to collect data
}
}
?>
What i want to achive is that every Controller in root/controller/*.php able to load any Model in root/model/*.php but class inside root/model/*.php must able to access (inheritance/extends) the Model class inside root/core/Model.php i firstly asked on chatGPT for some AI Generated answer, that the reason why i get this far.
Then i get this error, when the AI keep giving the same answer.
Fatal error: Cannot declare class Controller\Product because the name is already in use in C:\xampp\htdocs\app\shop\controller\Product.php on line 6
I actually realize that the simple way probably with naming the class so ther no conflict between it but i became aware how to properly using the namespace if its such features in php. Those files loaded without any autoloader, so i just require_once each file in root/init.php file.
I read few documentations but hard to implement in multiple files and directorys.
I Apreciate any feedback, thanks