Want to call the title inside the array in the funtions.php page

Hi, I wanted to get rid of the title of the side bar so i just made it into a comment but i want to put another comment when the widget closes with the name of the title so in the code i can see where it closes easily but i cant figure it out,
This is what I am putting in my functions page:

register_sidebar( array(
    'id'          => 'topsidebar',
    'name'        => __( 'Top Sidebar'),
    'before_widget' => '',
    'after_widget'  => '<!-- '. $title .' -->
	',
    'before_title'  => '<!-- ',
    'after_title'   => ' -->') );

Can anyone tell me what I’m doing wrong??
Thank you