WordPress - Display logged in users name in menu

gistfile1.txt

/**
 * Change the first item text in a WP menu to the users display name
 *
 * @param string   $title The menu item's title.
 * @param WP_Post  $item  The current menu item.
 * @param stdClass $args  An object of wp_nav_menu() arguments.
 * @param int      $depth Depth of menu item. Used for padding.
 */
function wp_nav_menu_display_name( $title, $item, $args, $depth ) {
	if( is_user_logged_in() ) {
		if( $args->theme_location == 'header_navigation' ) {
			if( $item->menu_order == 1 ) {
				global $current_user;

				$title = sprintf( __( 'Welcome, %s!', 'text-domain' ), $current_user->display_name );
			}
		}
	}

	return $title;
}
add_filter( 'nav_menu_item_title', 'wp_nav_menu_display_name', 10, 4 );