Folder::__construct PHP Méthode

    public function __construct($root)
    {
        if (file_exists($root) && is_file($root)) {
            throw new Exception('Invalid folder: ' . $root);
        }
        $this->root = $root;
    }

 /**
  * @param integer $folder_id
  */
 function __construct($folder_id)
 {
     global $user;
     if (is_numeric($folder_id)) {
         parent::__construct($folder_id);
         $this->group_folder = new FolderIsGroupFolder_Access($folder_id);
         $this->group_id = $this->group_folder->get_group_id();
         $group = new Group($this->group_id);
         if ($group->is_user_in_group($user->get_user_id()) == true) {
             if ($this->read_access == false) {
                 $this->data_entity_permission->set_read_permission();
                 if ($this->data_entity_permission->is_access(1)) {
                     $this->read_access = true;
                 }
             }
             if ($this->write_access == false) {
                 $this->data_entity_permission->set_write_permission();
                 if ($this->data_entity_permission->is_access(2)) {
                     $this->write_access = true;
                 }
             }
         }
     } else {
         parent::__construct(null);
         $this->group_folder = null;
         $this->group_id = null;
     }
 }