Wordpress create widget area in a widget - php

Question

I am trying to insert a custom widget area in another widget, but don't know where to start. Do I need to register new widget areas in widget class constructor with unique id's ?
What I am trying to achieve:
Insert a section widget which contains a widget area.
Insert custom widgets into that section with the widget area.
<?php
function dov_load_widget_default( ) {
register_widget( 'section' );
}
add_action( 'widgets_init', 'dov_load_widget_default' );
class section extends WP_Widget {
function __construct( ) {
parent::__construct(
'section',
__( 'Portfolio sections', 'dov_portfolio' ),
array( 'description' => __( 'Default section for widgets', 'dov_portfolio' ) )
);
}
// Creating widget front-end
public function widget( $args, $instance ) {
}
// Widget Backend
public function form( $instance ) {
}
// Updating widget replacing old instances with new
public function update( $new_instance, $old_instance ) {
$instance = array( );
return $instance;
}
}
?>

Answer 1

Don't know if it's the right way but it seems to work.
function dov_load_sidebars( ) {
register_sidebar( array(
'id' => 'portfolio_sections',
'name' => __( 'Portfolio sections', 'dov_portfolio' )
));
$sections = wp_get_sidebars_widgets( );
if( isset( $sections[ 'portfolio_sections' ] ) ) :
$sections = $sections[ 'portfolio_sections' ];
foreach( $sections as $section ) :
register_sidebar( array(
'id' => $section,
'name' => __( 'Portfolio section', 'dov_portfolio' ) . ': ' . $section
));
endforeach;
endif;
}
add_action( 'widgets_init', 'dov_load_sidebars' );
EDIT: After inserting the section widget the widget areas don't refresh. How can I refresh them or should I add them using js ?