sidebar-footer.php

<?php
/**
 * The Footer widget areas.
 *
 * @package WordPress
 * @subpackage Twenty_Eleven
 * @since Twenty Eleven 1.0
 */
?>

<?php
    /* The footer widget area is triggered if any of the areas
     * have widgets. So let's check that first.
     *
     * If none of the sidebars have widgets, then let's bail early.
     */
    if (   ! is_active_sidebar( 'sidebar-footer1'  )
        && ! is_active_sidebar( 'sidebar-footer2' )
        && ! is_active_sidebar( 'sidebar-footer3'  )
    )
        return;
    // If we get this far, we have widgets. Let do this.
?>
    <div id="supplementary" <?php twentyeleven_footer_sidebar_class(); ?> class="row">
        <div class="fourcol">
            <?php if ( is_active_sidebar( 'sidebar-footer1' ) ) : ?>
            <div id="first" class="widget-area" role="complementary">
                <?php dynamic_sidebar( 'sidebar-footer1' ); ?>
            </div><!-- #first .widget-area -->
            <?php endif; ?>
        </div>
        <div class="fourcol">
            <?php if ( is_active_sidebar( 'sidebar-footer2' ) ) : ?>
            <div id="second" class="widget-area" role="complementary">
                <?php dynamic_sidebar( 'sidebar-footer2' ); ?>
            </div><!-- #second .widget-area -->
            <?php endif; ?>
        </div>
        <div class="fourcol last">
            <?php if ( is_active_sidebar( 'sidebar-footer3' ) ) : ?>
            <div id="third" class="widget-area" role="complementary">
                <?php dynamic_sidebar( 'sidebar-footer3' ); ?>
            </div><!-- #third .widget-area -->
            <?php endif; ?>
        </div>
    </div><!-- #supplementary -->