register-widget

// Registers new home page widget
  add_action( 'widgets_init', 'my_widgets_init' );

  function my_widgets_init() {
    register_sidebar( array(
        'name' => 'My Homepage Widget',
        'id' => 'my-homepage-widget',
        'before_widget' => '<div class="homepage-widget">',
        'after_widget' => '</div>',
        'before_title' => '<h3>',
        'after_title' => '</h3>',
    ) );
  }