WordPress at a glance
function is not described

WP_Query::is_trackback() public WP 3.1.0

Is the query for a trackback endpoint call?

It's a method of the class: WP_Query{}

No Hooks.

Return

true/false. Whether the query is for a trackback endpoint call.

Usage

$WP_Query = new WP_Query();
$WP_Query->is_trackback();

Changelog

Since 3.1.0 Introduced.

Code of WP_Query::is_trackback() WP 5.5.1

<?php
public function is_trackback() {
	return (bool) $this->is_trackback;
}