How to update global header and footer

Resolved using this code: global $switched; switch_to_blog(1); //get_header(); $root = realpath($_SERVER[“DOCUMENT_ROOT”]); include ($root.’/wp-content/themes/themename/header.php’); restore_current_blog(); global $switched; switch_to_blog(1); //get_footer(); $root = realpath($_SERVER[“DOCUMENT_ROOT”]); include ($root.’/wp-content/themes/themename/footer.php’); restore_current_blog();