widget

class FusionFour_Greeter extends WP_Widget {

	public function __construct() {

		parent::__construct(
			'theme-greeter',
			__( 'Welcome to Fusion4.', 'fusionfour' ),
			array(
				'description' => __( 'Powered by FusionFour theme.', 'fusionfour' ),
			)
		);

	}

	public function widget( $args, $instance ) {

	}

	public function form( $instance ) {

	}

	public function update( $new_instance, $old_instance ) {

	}

}

function register_widgets() {
	register_widget( 'FusionFour_Greeter' );
}
add_action( 'widgets_init', 'register_widgets' );