get_comment_author_url()

get_comment_author_url( int|WP_Comment $comment_id ): string

function get_comment_author_url( $comment_id = 0 ) {
	$comment = get_comment( $comment_id );

	$comment_author_url = '';
	$comment_id         = 0;

	if ( ! empty( $comment ) ) {
		$comment_author_url = ( 'http://' === $comment->comment_author_url ) ? '' : $comment->comment_author_url;
		$comment_author_url = esc_url( $comment_author_url, array( 'http', 'https' ) );

		$comment_id = $comment->comment_ID;
	}

	/**
	 * Filters the comment author's URL.
	 *
	 * @since 1.5.0
	 * @since 4.1.0 The `$comment_id` and `$comment` parameters were added.
	 *
	 * @param string          $comment_author_url The comment author's URL, or an empty string.
	 * @param string|int      $comment_id         The comment ID as a numeric string, or 0 if not found.
	 * @param WP_Comment|null $comment            The comment object, or null if not found.
	 */
	return apply_filters( 'get_comment_author_url', $comment_author_url, $comment_id, $comment );
}