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

Handles updating settings for the current RSS 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-rss.php 

public function update( $new_instance, $old_instance ) {
		$testurl = ( isset( $new_instance['url'] ) && ( ! isset( $old_instance['url'] ) || ( $new_instance['url'] !== $old_instance['url'] ) ) );
		return wp_widget_rss_process( $new_instance, $testurl );
	}

Uses

Uses Description
wp-includes/widgets.php: wp_widget_rss_process()

Process RSS feed widget data and optionally retrieve feed items.

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_rss/update