WordPress at a glance
function is not described

wp_cache_set_comments_last_changed() WP 5.0.0

Sets the last changed time for the 'comment' cache group.

No Hooks.

Return

null. Nothing.

Usage

wp_cache_set_comments_last_changed();

Changelog

Since 5.0.0 Introduced.

Code of wp_cache_set_comments_last_changed() WP 5.7.2

<?php
function wp_cache_set_comments_last_changed() {
	wp_cache_set( 'last_changed', microtime(), 'comment' );
}