get_comment_author( int|WP_Comment $comment_id = 0 ): string

24function get_comment_author( $comment_id = 0 ) {25	$comment = get_comment( $comment_id );26 27	if ( ! empty( $comment->comment_ID ) ) {28		$comment_id = $comment->comment_ID;29	} elseif ( is_scalar( $comment_id ) ) {30		$comment_id = (string) $comment_id;31	} else {32		$comment_id = '0';33	}34 35	if ( empty( $comment->comment_author ) ) {36		$user = ! empty( $comment->user_id ) ? get_userdata( $comment->user_id ) : false;37		if ( $user ) {38			$comment_author = $user->display_name;39		} else {40			$comment_author = __( 'Anonymous' );41		}42	} else {43		$comment_author = $comment->comment_author;44	}45 46	/**47	 * Filters the returned comment author name.48	 *49	 * @since 1.5.050	 * @since 4.1.0 The `$comment_id` and `$comment` parameters were added.51	 *52	 * @param string     $comment_author The comment author's username.53	 * @param string     $comment_id     The comment ID as a numeric string.54	 * @param WP_Comment $comment        The comment object.55	 */56	return apply_filters( 'get_comment_author', $comment_author, $comment_id, $comment );57}