In functions.php file
function my_widgets_init() {
register_sidebar( array(
‘name’ => __( ‘Header Sidebar’, ‘my’ ),
‘id’ => ‘header-sidebar’,
‘before_widget’ => ‘
‘,
‘after_widget’ => ‘
‘after_widget’ => ‘
‘,
‘before_title’ => ‘
‘,
‘after_title’ => ‘
‘,
) );
}
add_action( ‘widgets_init’, ‘my_widgets_init’ );
In header.php