global_nav vs. wp_list_pages

What’s global_nav? I can’t find any trace of it in any WordPress function reference…

It’s in the sandbox theme. It’s in the header. It seems to serve the same purpose as wp_list_pages.

From Sandbox’s functions.php:

// Produces a list of pages in the header without whitespace
function sandbox_globalnav() {
	if ( $menu = str_replace( array( "\r", "\n", "\t" ), '', wp_list_pages('title_li=&sort_column=menu_order&echo=0') ) )
		$menu = '<ul>' . $menu . '</ul>';
	$menu = '<div id="menu">' . $menu . "</div>\n";
	echo apply_filters( 'globalnav_menu', $menu ); // Filter to override default globalnav: globalnav_menu
}

So in essence, it’s a wrapper for wp_list_pages and the difference is global_nav takes out the whitespace (line returns) in the output

Thank you.

Digging a little deeper, how does the sandbox_globalnav function produce a horizontal menu? It is a list and a list is vertical. I would like to produce a menu that is horizontal for my parent pages and vertical for my child pages. I don’t understand how to modify this function to achieve this effect. Any idea how to modify this function to do that? Thanks.