我认为这是您需要的：sidebar_admin_setup

更多信息：https://codex.wordpress.org/Plugin_API/Action_Reference/sidebar_admin_setup

@Mateus Felipe，有几种方法可以用钩子处理，wp_ajax_save-widget, wp_ajax_widgets-order, customize_save_{$id_base}, wp_ajax_customize_save, 或customize_save_response 或delete_widget 仅在删除事件中时。

Example

foreach ( array( \'wp_ajax_save-widget\', \'wp_ajax_widgets-order\', \'wp_ajax_customize_save\' ) as $action ) {
    add_action( $action, function() {
        //do something, i.e add post meta for post with ID 1
        add_post_meta ( 1, \'fruit\', \'banana\', true );
    }, 1 ); //must use priority, example 1
}