Access value in method sent by parent::__construct() - php

Question

I'm having trouble getting the value passed via parent__construct in a Controller's child class and using that value in a class called View.
When performing a var_dump in the __Construct of the Controller class I can retrieve the value sent from the Form class, but when I try to retrieve this same value in a METHOD inside the View class, it appears as null.
Could you help me with this problem?
Here are the codes:
============================================
class Form extends Controller
{
//General builder of the WEB pages
public function __construct()
{
//Redirecting the entire site for maintenance
//redirect("/ops/maintenance");
parent::__construct(__DIR__ . "/../../../themes/" . THEME . "/pages/");
}
}
============================================
class controller
{
/** #var View */
protected $view;
/** #var Message */
protected $message;
//Builder extending classes
/**
* Controller constructor
* #param string|null $pathToViews
*/
public function __construct(string $pathToViews = null)
{
$this->view = new View($pathToViews);
//the value passed in parent::__construct() appears here
var_dump($pathToViews);
$this->message = new Message();
}
}
============================================
//Class responsible for handling Views requests
class view
{
protected $pathToViews;
public function __construct(string $pathToViews = null)
{
$this->pathToViews = $pathToViews;
}
//Function to Load the View and send content from the backend to the frontend
public function show($viewName, $data = [])
{
var_dump($this->pathToViews);
}
}

Answer 1

Update:
If you don't want to call the show method in the controller class, but you want to instantiate that class in your controller class you should find a way to get the view class accessible outside of your controller class. Just instantiating view class again outside of the controller is another instance and will indeed show a null value on the $pathToViews variable.
One way of doing this is like this:
class controller
{
/** #var View */
protected $view;
//Builder extending classes
/**
* Controller constructor
* #param string|null $pathToViews
*/
public function __construct(string $pathToViews = null)
{
$this->view = new View($pathToViews);
var_dump($pathToViews);
}
public function getView() : View
{
return $this->view;
}
}
//Class responsible for handling Views requests
class View
{
protected $pathToViews;
public function __construct(string $pathToViews = null)
{
$this->pathToViews = $pathToViews;
echo $this->pathToViews;
}
//Function to Load the View and send content from the backend to the frontend
public function show($viewName, $data = [])
{
var_dump($this->pathToViews);
}
}
$controller = new controller('testString');
$view = $controller->getView();
$view->show('test');
Another way of doing this is using the principle of dependency inversion
class controller
{
/** #var View */
protected $view;
//Builder extending classes
/**
* Controller constructor
* #param View $view
* #param string|null $pathToViews
*/
public function __construct(View $view, string $pathToViews = null)
{
$this->view = $view;
$this->view->setPathtoViews($pathToViews);
var_dump($pathToViews);
}
public function getView() : View
{
return $this->view;
}
}
//Class responsible for handling Views requests
class View
{
protected $pathToViews;
public function setPathtoViews(string $pathToViews)
{
$this->pathToViews = $pathToViews;
}
//Function to Load the View and send content from the backend to the frontend
public function show($viewName, $data = [])
{
var_dump($this->pathToViews);
}
}
$view = new View();
$controller = new controller($view, 'testString');
$view->show('test');
?>
Original answer
Your code runs fine on my machine. I have run the code block below. What I did change to make it work was actually calling $this->view->show(). In your code example that wasn't the case.
As a small note. I know php is case insensitive but as a good practice call your classes with the same casing as how you defined them (view vs View).
<?php
class controller
{
/** #var View */
protected $view;
//Builder extending classes
/**
* Controller constructor
* #param string|null $pathToViews
*/
public function __construct(string $pathToViews = null)
{
$this->view = new View($pathToViews);
$this->view->show('test');
var_dump($pathToViews);
}
}
//Class responsible for handling Views requests
class View
{
protected $pathToViews;
public function __construct(string $pathToViews = null)
{
$this->pathToViews = $pathToViews;
echo $this->pathToViews;
}
//Function to Load the View and send content from the backend to the frontend
public function show($viewName, $data = [])
{
var_dump($this->pathToViews);
}
}
$controller = new controller('testString');
?>