WP_Widget_Categories::update( array $new_instance, array $old_instance )

Handles updating settings for the current Categories widget instance.

Parameters

$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.

Return

(array) Updated settings to save.

Source

File: wp-includes/widgets/class-wp-widget-categories.php

public function update( $new_instance, $old_instance ) {
		$instance                 = $old_instance;
		$instance['title']        = sanitize_text_field( $new_instance['title'] );
		$instance['count']        = ! empty( $new_instance['count'] ) ? 1 : 0;
		$instance['hierarchical'] = ! empty( $new_instance['hierarchical'] ) ? 1 : 0;
		$instance['dropdown']     = ! empty( $new_instance['dropdown'] ) ? 1 : 0;

		return $instance;
	}

Changelog

Version Description
2.8.0 Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/wp_widget_categories/update