i created a model object in PHP

class User {
  public $title;

  public function changeTitle($newTitle){
    $this->title = $newTitle; 
  }
}

How do i expose the property of a User object in smarty just by assigning the object?

I know i can do this

$smarty->assign('title', $user->title);

but my object has something like over 20 plus properties.

Please advise.

EDIT 1

the following didn't work for me.

$smarty->assign('user', $user);

OR

$smarty->register_object('user', $user);

then i try to {$user->title}

nothing came out.

Thank you.