Register Sidebar Widgets

register_sidebar.php

+++++++++++++
Functions.php
+++++++++++++

//Register Sidebar
function bewe_init_widgets($id){
  register_sidebar(array(
    'name'          => 'Sidebar',
    'id'            => 'sidebar',
    'before_widget' => '<div class="widget widget-master">',
    'after_widget'  => '</div>',
    'before_title'  => '<h3>',
    'after_title'   => '</h3>'
  ));
}
add_action('widgets_init'), ('bewe_init_widgets');

++++++++++++++++++++++++++++++++++
In Index.php, Single.php, Page.php
++++++++++++++++++++++++++++++++++

<?php if(is_active_sidebar('sidebar')); ?>
  <?php dynamic_sidebar('sidebar'); ?>
<?php endif(); ?>

NB : Then moved <aside> //code </aside> to Footer.php