How to update global header and footer

by

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();