count comment

function wpb_comment_count($post_id) { 
	$comments_count = wp_count_comments($post_id);
	$message = '<h6><i class="fa fa-comment"></i>'.$comments_count->approved.'</h6>' ;
	 
	return $message; 
 
} 
add_shortcode('wpb_total_comments','wpb_comment_count'); 
add_filter('widget_text','do_shortcode');