WordPress at a glance
function is not described

comment_author_IP() WP 0.71

Display the IP address of the author of the current comment.

  • Since 4.4.0 Added the ability for $comment_ID to also accept a WP_Comment object.

No Hooks.

Return

Nothing (null).

Usage

comment_author_IP( $comment_ID );
$comment_ID(int/WP_Comment)
WP_Comment or the ID of the comment for which to print the author's IP address.
Default: current comment

Code of comment author IP: wp-includes/comment-template.php VER 5.1.1

<?php
function comment_author_IP( $comment_ID = 0 ) {
	echo esc_html( get_comment_author_IP( $comment_ID ) );
}