The Widget's Callback Array Stores Wrong Values

[oxibug]

While trying to get Widget's saved settings I stuck a very weird issue, The objects [number] and [id] in the Widget's Object [callback][0] always refer to the last widget created.

Create Two or more of the same Widget, Then print out the settings, You will notice that the [number] and [id] inside the [callback] array different than the main [id] and [number] inside the [params] array, So when use the [number] from the callback array it refers to a wrong index which is the last created widget's index not the current.

add_action( 'wp', 'test_widgets' );
function test_widgets() {
        
    global $wp_registered_widgets;
    $widgets_ids = retrieve_widgets( FALSE );

    foreach( $widgets_ids as $sb_id => $widgets ) {

        if( 'wp_inactive_widgets' === (string) $sb_id ) {
            continue;
        }

        foreach( $widgets as $active_widget_id ) {

            if( ! isset( $wp_registered_widgets[ $active_widget_id ] ) ) {
                continue;
            }

            echo print_r( $wp_registered_widgets[ $active_widget_id ] );


           /**
            * Widget Object
            * @var \WP_Widget
            * */
            $obj_widget         = $wp_registered_widgets[ $active_widget_id ]['callback'][0];

            /* If you use the callback object to get the Widget's index it'll refer to a wrong index */

            /* TRY: echo $obj_widget->number; */


        }

    }

}

Output:

Array
(
    [name] => Meta
    [id] => meta-4
    [callback] => Array
        (
            [0] => WP_Widget_Meta Object
                (
                    [id_base] => meta
                    [name] => Meta
                    [option_name] => widget_meta
                    [alt_option_name] => 
                    [widget_options] => Array
                        (
                            [classname] => widget_meta
                            [customize_selective_refresh] => 1
                            [description] => Login, RSS, & WordPress.org links.
                        )

                    [control_options] => Array
                        (
                            [id_base] => meta
                        )

                    [number] => 4
                    [id] => meta-4
                    [updated] => 
                )

            [1] => display_callback
        )

    [params] => Array
        (
            [0] => Array
                (
                    [number] => 4
                )

        )

    [classname] => widget_meta
    [customize_selective_refresh] => 1
    [description] => Login, RSS, & WordPress.org links.
)
1Array
(
    [name] => Meta
    [id] => meta-3
    [callback] => Array
        (
            [0] => WP_Widget_Meta Object
                (
                    [id_base] => meta
                    [name] => Meta
                    [option_name] => widget_meta
                    [alt_option_name] => 
                    [widget_options] => Array
                        (
                            [classname] => widget_meta
                            [customize_selective_refresh] => 1
                            [description] => Login, RSS, & WordPress.org links.
                        )

                    [control_options] => Array
                        (
                            [id_base] => meta
                        )

                    [number] => 4
                    [id] => meta-4
                    [updated] => 
                )

            [1] => display_callback
        )

    [params] => Array
        (
            [0] => Array
                (
                    [number] => 3
                )

        )

    [classname] => widget_meta
    [customize_selective_refresh] => 1
    [description] => Login, RSS, & WordPress.org links.
)

[turrdpress]

I also see this same issue. Widget is called something like 'widget-1234' and the callback shows 'widget-137'. I suspect the callback parameter is being passed by reference inside of a loop.

Version: WordPress 6.1.1
OS: Nginx