add_action( 'comment_unapproved_to_approved', 'comment_unapproved_to_approved_example' ); function comment_unapproved_to_approved_example( $comment ) { $commenter_email = $comment->comment_author_email; $commenter_name = $comment->comment_author; $post_url = get_comment_link( $comment ); $subject = "Your comment is up!"; $message = "Hello $commenter_name,\n\nYour comment has been approved!You can view it below:\n\n$post_url\n\nThank you for sharing your ideas with us!"; wp_mail( $commenter_email, $subject, $message ); }