//register widgets
add_action('widgets_init', function () {
$config = [
'before_widget' => '<section class="widget %1$s %2$s">',
'after_widget' => '</section>',
'before_title' => '<h3>',
'after_title' => '</h3>'
];
register_sidebar([
'name' => __('Footer', 'sage'),
'id' => 'sidebar-footer'
] + $config);
});
// display widgets
dynamic_sidebar('sidebar-footer')