_wp_remove_unregistered_widgets() WordPress Function

The wp_remove_unregistered_widgets() function allows you to remove any widgets that have not been registered with the WordPress widget API. This can be useful if you want to clean up your widget area and only display widgets that you know are safe and compatible with your theme.

_wp_remove_unregistered_widgets( array $sidebars_widgets, array $allowed_widget_ids = array() ) #

function _wp_remove_unregistered_widgets( $sidebars_widgets, $allowed_widget_ids = array() ) {
	if ( empty( $allowed_widget_ids ) ) {
		$allowed_widget_ids = array_keys( $GLOBALS['wp_registered_widgets'] );
	}

	foreach ( $sidebars_widgets as $sidebar => $widgets ) {
		if ( is_array( $widgets ) ) {
			$sidebars_widgets[ $sidebar ] = array_intersect( $widgets, $allowed_widget_ids );
		}
	}

	return $sidebars_widgets;
}