How to Notify Users on Replies to Their WordPress Comments

2. Add the code snippet below in your “functions.php” and edit accordingly.

// add comment notifier
add_action('comment_post', 'notify_author_of_reply', 10, 2);

function notify_author_of_reply($comment_id, $approved){
	if(1 === $approved)
	{
		$comment 	= get_comment($comment_id);
		$comment_link 	= get_comment_link($comment_id);

		if($comment->comment_parent)
		{
			$parent_comment = get_comment($comment->comment_parent);
			
			wp_mail(
				$parent_comment->comment_author_email,
				'Email Subject', 
				'Your message',
				'Email Header'
			);
		}
	}
}

3. The add_action function will hook your notify_author_of_reply function whenever comment_post is triggered. Please change the name of notify_author_of_reply function to anything if you already has the function defined to do something else.

4. In notify_author_of_reply function, if the reply comment is approved, then only we send notification email via wp_mail. You can refer to wordpress documentation for more extensive reference.

5. And that’s all!

To see this function in action, you may drop a meaningful comment or feedback below and I will reply to yours. If you need help on this, do not hesitate to contact me.

Happy coding!