wp_set_sidebars_widgets example

$number = preg_replace( '/.+?-([0-9]+)$/', '$1', $widget_id );

        // Only keep active and default widgets.         if ( is_numeric( $number ) && (int) $number < 2 ) {
            unset( $lost_widgets[ $key ] );
        }
    }
    $sidebars_widgets['wp_inactive_widgets'] = array_merge( $lost_widgets, (array) $sidebars_widgets['wp_inactive_widgets'] );

    if ( 'customize' !== $theme_changed ) {
        // Update the widgets settings in the database.         wp_set_sidebars_widgets( $sidebars_widgets );
    }

    return $sidebars_widgets;
}

/** * Compares a list of sidebars with their widgets against an allowed list. * * @since 4.9.0 * @since 4.9.2 Always tries to restore widget assignments from previous data, not just if sidebars needed mapping. * * @param array $existing_sidebars_widgets List of sidebars and their widget instance IDs. * @return array Mapped sidebars widgets. */

foreach ( $val as $k => $v ) {
                    if ( ! str_contains( $v, 'widget-' ) ) {
                        continue;
                    }

                    $sb[ $k ] = substr( $v, strpos( $v, '_' ) + 1 );
                }
            }
            $sidebars[ $key ] = $sb;
        }

        wp_set_sidebars_widgets( $sidebars );
        wp_die( 1 );
    }

    wp_die( -1 );
}

/** * Handles saving a widget via AJAX. * * @since 3.1.0 * * @global array $wp_registered_widgets * @global array $wp_registered_widget_controls * @global array $wp_registered_widget_updates */

                    // This automatically removes omitted widget IDs to the inactive sidebar.                     if ( $sidebar_id === $request['id'] && ! in_array( $widget_id, $request['widgets'], true ) ) {
                        $sidebars['wp_inactive_widgets'][] = $widget_id;
                    }
                }
            }

            $sidebars[ $request['id'] ] = $request['widgets'];

            wp_set_sidebars_widgets( $sidebars );
        }

        $request['context'] = 'edit';

        $sidebar = $this->get_sidebar( $request['id'] );

        /** * Fires after a sidebar is updated via the REST API. * * @since 5.8.0 * * @param array $sidebar The updated sidebar. * @param WP_REST_Request $request Request object. */

// Remove old position.     if ( ! isset( $_POST['delete_widget'] ) ) {
        foreach ( $sidebars_widgets as $key => $sb ) {
            if ( is_array( $sb ) ) {
                $sidebars_widgets[ $key ] = array_diff( $sb, array( $widget_id ) );
            }
        }
        array_splice( $sidebars_widgets[ $sidebar_id ], $position, 0, $widget_id );
    }

    wp_set_sidebars_widgets( $sidebars_widgets );
    wp_redirect( admin_url( 'widgets.php?message=0' ) );
    exit;
}

// Remove inactive widgets without JS. if ( isset( $_POST['removeinactivewidgets'] ) ) {
    check_admin_referer( 'remove-inactive-widgets', '_wpnonce_remove_inactive_widgets' );

    if ( $_POST['removeinactivewidgets'] ) {
        foreach ( $sidebars_widgets['wp_inactive_widgets'] as $key => $widget_id ) {
            $pieces       = explode( '-', $widget_id );