7 calls to url_is_external()

drupal_goto in drupal/core/includes/common.inc
Sends the user to a different Drupal page.
drupal_valid_path in drupal/core/includes/path.inc
Checks a path exists and the current user has access to it.
form_builder in drupal/core/includes/form.inc
Builds and processes all elements in the structured form array.
MenuLinkFormController::validate in drupal/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php
Overrides EntityFormController::validate().
MenuLinkStorageController::preSave in drupal/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php
Overrides DatabaseStorageController::preSave().
shortcut_valid_link in drupal/core/modules/shortcut/shortcut.module
Determines if a path corresponds to a valid shortcut link.
UrlTest::testDrupalParseUrl in drupal/core/modules/system/lib/Drupal/system/Tests/Common/UrlTest.php
Tests drupal_parse_url().