why fatal error like using $this when not in object content? - php

Question

I have a problem with the following code. When I use $this when not in object content.
dashboardController.php
<?php
class dashboardController extends BaseController{
public function index($name=''){
$this->view->loadView('dashboard/index');
}
}
baseController.php
<?php
class BaseController{
public function loadView($viewName){
$this->view = new View($viewName);
}
}
view.php
<?php
class View{
public function __construct($viewName);{ echo " i am form view to render
}
}
I am getting the error using $this when not in object content but in another folder the login went success without.

Answer 1

Try this:
dashboardController
<?php
class dashboardController extends BaseController
{
public function index($name = '')
{
// Call loadView(), because this controller doesn't have a method
// called loadView() it'll fall back to loadView() in the BaseController
$this->loadView('dashboard/index');
// Get the viewName from the view, will be 'dashboard/index'
echo $this->view->getViewName();
}
}
BaseController
<?php
class BaseController
{
// The view, protected so it can be accessed by children via $this->view
protected $view;
// Load a view, protected so it can only be accessed by children
// or within this controller
protected function loadView($viewName)
{
// Create a new view instance
$this->view = new View($viewName);
}
}
View
<?php
class View
{
// The loaded view, private so it can't be changed by an external class
private $viewName;
public function __construct($viewName)
{
$this->viewName = $viewName;
}
// Retrieve the view name, public so anything can access it
public function getViewName()
{
return $this->viewName;
}
}