Automatically close comments in the Carousel view

You can use the following code to automatically close comments in the Carousel view, based on the number of days you’ve defined in Settings > Discussion:

function jpcarousel_auto_close_comments( $open, $post_id ) {
	$post = get_post( $post_id );

	$days_old = (int) get_option( 'close_comments_days_old' );

	if ( ! $days_old )
		return $open;

	if( $post->post_type == 'attachment' && time() - strtotime( $post->post_date_gmt ) > ( $days_old * DAY_IN_SECONDS ) ) {
		return false;
	}
	return $open;
}
add_filter( 'comments_open', 'jpcarousel_auto_close_comments', 10 , 2 );