Ragister sidebar or widget area

/*==================function for register widgets=================*/


function brightpage_widget_areas() {

    register_sidebar( array(
        'name' => __( 'Sidebar name', 'brightpage' ),
        'id' => 'sidebar_id',
        'description' => __( 'An optional widget area for your welcome message area.', 'brightpage' ),
        'before_widget' => '<div class="big">',
        'after_widget' => '</div>',
        'before_title' => '',
        'after_title' => '',
    ) );


        register_sidebar( array(
        'name' => __( 'Sidebar name', 'brightpage' ),
        'id' => 'sidebar_id',
        'description' => __( 'An optional widget area for your welcome message area.', 'brightpage' ),
        'before_widget' => '<div class="big">',
        'after_widget' => '</div>',
        'before_title' => '',
        'after_title' => '',
    ) );

}
add_action('widgets_init', 'brightpage_widget_areas');



/*Paste this code in your widget position*/
<?php dynamic_sidebar('sidebar_id'); ?>




<?php if ( ! dynamic_sidebar( 'sidebar-right' ) ) : ?>
<?php endif; ?>
-----------------------------------------------------
/* Default way Paste this code in your widget position*/

<?php if ( is_active_sidebar( 'widget-id' ) ) : ?>
     <div id="widget-area" class="widget-area" role="complementary">
    <?php dynamic_sidebar( 'widget-id' ); ?>
     </div><!-- .widget-area -->
<?php endif; ?>

/* Widgest show code style 2 new version */
<?php
   if(is_active_sidebar("footer-widgets")){
      dynamic_sidebar("footer-widgets");
   }
   else{
      echo "<h4 style='text-align: center;'>Please add some widgets here</h4>";
   }
?>