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<?php if ( is_active_sidebar( 'nome-widget' ) ) { ?>
	<ul id="sidebar">
		<?php dynamic_sidebar( 'nome-widget' ); ?>
	</ul>
<?php } ?>

<?php if ( !function_exists('dynamic_sidebar') || !dynamic_sidebar('nome-widget') ) : ?>
<?php endif; ?>

if ( function_exists('register_sidebar') ) {
    register_sidebar(array(
	'name'          => 'Nome Per Esteso Widget',
	'id'            => "nome-widget",
	'before_widget' => '',
	'after_widget'  => '',
	'before_title'  => '',
	'after_title'   => '' ) );
}