HEAD導致「使用未定義的常量FULL_BASE_URL」通知

Question

我有一個CakePHP網站，它的佈局中使用了FULL_BASE_URL常數。我注意到，象這樣的錯誤顯示在我的「的debug.log」文件了：

2013-12-18 16:25:04 Notice: Notice (8): Use of undefined constant FULL_BASE_URL - assumed 'FULL_BASE_URL' in [/var/www/example.com/app/View/Layouts/default-app.ctp, line 11] 
Trace: 
include - APP/View/Layouts/default-app.ctp, line 11 
View::_evaluate() - APP/Lib/cakephp/lib/Cake/View/View.php, line 945 
View::_render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 907 
View::renderLayout() - APP/Lib/cakephp/lib/Cake/View/View.php, line 535 
View::render() - APP/Lib/cakephp/lib/Cake/View/View.php, line 479 
Controller::render() - APP/Lib/cakephp/lib/Cake/Controller/Controller.php, line 948 
PagesController::display() - APP/Controller/PagesController.php, line 105 
ReflectionMethod::invokeArgs() - [internal], line ?? 
Controller::invokeAction() - APP/Lib/cakephp/lib/Cake/Controller/Controller.php, line 486 
Dispatcher::_invoke() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 187 
Dispatcher::dispatch() - APP/Lib/cakephp/lib/Cake/Routing/Dispatcher.php, line 162 
[main] - APP/webroot/index.php, line 114 

望着Apache的訪問日誌，我看到它是由這個原因引起：

198.252.206.16 - - [18/Dec/2013:16:25:02 -0700] "HEAD/HTTP/1.0" 200 317 "-" "-"

的唯一途徑我已經能夠重現這是通過使用Telnet，像這樣：

telnet example.com 80 
HEAD/HTTP/1.0 
[push enter again] 

可能是什麼造成的？這是與我的PHP配置或我的Apache配置或其他東西？

Answer 1

這記錄在http://book.cakephp.org/2.0/en/core-libraries/global-constants-and-functions.html#FULL_BASE_URL。請檢查。