public function __construct()
 {
     parent::__construct();
     $this->_update = filter_input(INPUT_GET, 'update');
     $this->_settingsUpdate = filter_input(INPUT_POST, 'updatebutton');
     $this->_extension = filter_input(INPUT_GET, 'extension');
 }
 /** 
  * SettingsController constructor function  
  */
 public function __construct()
 {
     parent::__construct();
     /** Get update, updatebutton and extension parameters from request URL */
     $this->_update = filter_input(INPUT_GET, 'update');
     $this->_settingsUpdate = filter_input(INPUT_POST, 'updatebutton');
     $this->_extension = filter_input(INPUT_GET, 'extension');
 }