Register Sidebar

functions.php

register_sidebar( array(
	'name'          => esc_html__( 'My Sidebar', 'text-domain' ),
	'id'            => 'my-sidebar',
	'description'   => esc_html__( 'Add sidebar widgets here.', 'text-domain' ),
	'before_widget' => '<section id="%1$s" class="widget %2$s">',
	'after_widget'  => '</section>',
	'before_title'  => '<h2 class="widget-title">',
	'after_title'   => '</h2>',
) );