WordPress at a glance
function is not described

WP_Widget_Tag_Cloud::update() public WP 2.8.0

Handles updating settings for the current Tag Cloud widget instance.

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

No Hooks.

Return

Array. Settings to save or bool false to cancel saving.

Usage

$WP_Widget_Tag_Cloud = new WP_Widget_Tag_Cloud();
$WP_Widget_Tag_Cloud->update( $new_instance, $old_instance );
$new_instance(array) (required)
New settings for this instance as input by the user via WP_Widget::form().
$old_instance(array) (required)
Old settings for this instance.

Changelog

Since 2.8.0 Introduced.

Code of WP_Widget_Tag_Cloud::update() WP 5.7.2

<?php
public function update( $new_instance, $old_instance ) {
	$instance             = array();
	$instance['title']    = sanitize_text_field( $new_instance['title'] );
	$instance['count']    = ! empty( $new_instance['count'] ) ? 1 : 0;
	$instance['taxonomy'] = stripslashes( $new_instance['taxonomy'] );
	return $instance;
}