Trying to add widgets to single.php, getting syntax error.

I’m editing a theme and I came up with the bright idea to replace the comments beneath each post with two widgets.

I added the following code to my functions.php for each of them:

if (function_exists('register_sidebar')) {
register_sidebar(array(
'name' => 'Extra Widgets',
'id' => 'extra-widgets',
'description' => 'The extra widgets for your website.',
'before_widget' => '<div id="%1$s" class="widget %2$s">',
'after_widget' => '</div>',
'before_title' => '<h2>',
'after_title' => '</h2>'
));
}

No problem.

Now, when I go into my single.php file to remove the comments code and replace it with:

<ul><?php if (!function_exists('dynamic_sidebar') || !dynamic_sidebar('Extra Widgets')) :

endif; ?></ul>

Dreamweaver is telling me I have a syntax error in my code. The line it singles out is:

<?php get_footer(); ?>

I’m not sure what I’m doing wrong. I’m removing the comments code in its entirety and the only thing between the code I’m pasting in and <?php get_footer();?> is:

<div class="clear"></div>
                    </div>
                       <?php get_sidebar('left'); ?>
                </div>
                <div class="clear"></div>
            </div>

Any ideas on where I’m going wrong?

Thanks!