menu_page_url() WordPress Function

function menu_page_url( $menu_slug, $display = true ) {
	global $_parent_pages;

	if ( isset( $_parent_pages[ $menu_slug ] ) ) {
		$parent_slug = $_parent_pages[ $menu_slug ];

		if ( $parent_slug && ! isset( $_parent_pages[ $parent_slug ] ) ) {
			$url = admin_url( add_query_arg( 'page', $menu_slug, $parent_slug ) );
		} else {
			$url = admin_url( 'admin.php?page=' . $menu_slug );
		}
	} else {
		$url = '';
	}

	$url = esc_url( $url );

	if ( $display ) {
		echo $url;
	}

	return $url;
}
Uses	Description
wp-includes/formatting.php:esc_url()	Checks and cleans a URL.
wp-includes/functions.php:add_query_arg()	Retrieves a modified URL query string.
wp-includes/link-template.php:admin_url()	Retrieves the URL to the admin area for the current site.