Register sidebar

function industry_wp_widgets_init() {
	register_sidebar( array(
		'name'          => esc_html__( 'Footer widgets', 'industry-wp' ),
		'id'            => 'footer',
		'description'   => esc_html__( 'Add footer widgets here.', 'industry-wp' ),
		'before_widget' => '<div id="%1$s" class="widget %2$s">',
		'after_widget'  => '</div>',
		'before_title'  => '<h2 class="widget-title">',
		'after_title'   => '</h2>',
	) );
}
add_action( 'widgets_init', 'industry_wp_widgets_init' );