comment_author_IP( int|WP_Comment $comment_id )

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

Parameters

$comment_id

(Optional) WP_Comment or the ID of the comment for which to print the author's IP address.<br> Default current comment.

Source

File: wp-includes/comment-template.php 

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

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Changelog

Changelog
Version Description
4.4.0 Added the ability for $comment_id to also accept a WP_Comment object.
0.71 Introduced.