public function selectImages()
 {
     $this->render("/Layout/ajax");
     //this line render the view, since this is a ajax response it will load the respective ajax view
     if ($this->request->is('post')) {
         // $dir represents the /img folder where all the images are stored, this means that
         // this new folder command is not creating a new folder, just creating a new path
         $dir = new folder(WWW_ROOT . 'img/');
         //$path = $dir->path;
         // ->find('.*', true) => finds all the files inside /img folder
         $files = $dir->find('.*', true);
         // encode the files in the json format
         echo json_encode($files);
         exit;
         // it doesn't work without the exit;
     }
 }