in the funcion.php
register_sidebar( array( 'name' => 'Footer Sidebar one', 'id' => 'footer-sidebar-one', 'description' => 'Appears in the footer area', 'before_widget' => '<aside id="%1$s" class="widget %2$s">', 'after_widget' => '</aside>', 'before_title' => '<h3 class="widget-title">', 'after_title' => '</h3>', ) );
in the theme file (footer.php, sidebar.php, etc )
<div id="footer-sidebar" class="secondary"> <div id="footer-sidebarone"> <?php if(is_active_sidebar('footer-sidebar-one')){ dynamic_sidebar('footer-sidebar-one'); } ?> </div>