Verwenden von $ dies, wenn nicht im Objektkontext

Question

Ich sehe einige seltsame Fehler auf meiner Client-Website. Es ist Code, den jemand anders für ihn für seine Bewerbung gemacht hat. Die Fehlermeldung besagt, dass $this, wenn nicht im Objektkontext, sondern die Class wurde erweitert, wo von App.

Bitte helfen Sie.

Fehler

Fatal error: Using $this when not in object context in contactController.php on line 6

contactController.php

class contactController extends App{  
    public function index(){ 
     $this->view('content'); //error mmessage is pointing here 
    } 
} 

app.php

class App{ 

    public $controller; 
    public $method; 
    public $params = []; 

    public function view($file){ 
     include(site_path() . '/views/' . $file . '.php'); 
    } 

    public function model($file){ 
     require_once(site_path() . '/models/' . $file . '.php'); 
    } 

    public function engine(){ 
     global $core_current_ControllerMethod, $core_current_controller, $core_current_method; 
     //Get the current controller and method from a helper function 
     $get_wc_cm = get_wc_cm(); 
     //Assign it to the global variable 
     $core_current_ControllerView = $get_wc_cm; 
     //Seperate the controller and method 
     $cm = explode('@', $get_wc_cm); 
     $controller = !empty($cm[0])? $cm[0]: null; // This is the controller 
     $method = !empty($cm[1])? $cm[1]: null; // This is the method 
     //Assign it to the global varaible 
     $core_current_controller = $controller; 
     $core_current_method = $method; 
     //Assign it to the class variable 
     $this->controller = $controller; 
     $this->method = $method; 

     $ControllerFile = site_path(). '/controllers/' . $this->controller . '.php'; 
     if(file_exists($ControllerFile)){ 
      require_once($ControllerFile); 
      new $this->controller; 
      $callback = is_callable(array($this->controller, $this->method), false); 
      if($callback){ 
       call_user_func_array([$this->controller, $this->method], [$this->params]); 
      } 
     } 
    } 

} 

$app = (new App)->engine(); 

Answer 1

Versuchen zu ändern:

class contactController extends App{  
    public function index(){ 
     $this->view('content'); //error mmessage is pointing here 
    } 
} 

An:

class contactController extends App{  
    public function index(){ 
     parent::view('content'); //error mmessage is pointing here 
    } 
}