8 calls to menu_path_is_external() in Drupal 6

drupal_access_denied in includes/common.inc

Generates a 403 error if the request is not allowed.

drupal_goto in includes/common.inc

Send the user to a different Drupal page.

drupal_not_found in includes/common.inc

Generates a 404 error if the request can not be handled.

menu_edit_item_validate in modules/menu/menu.admin.inc

Validate form values for a menu link being added or edited.

menu_link_save in includes/menu.inc

Save a menu link.

menu_valid_path in includes/menu.inc

Validates the path of a menu link being created or edited.

url in includes/common.inc

Generates an internal or external URL.

_drupal_bootstrap in includes/bootstrap.inc