A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/LanguageSwitcher.php

Line Number: 19

Backtrace:

File: C:\inetpub\wwwroot\application\controllers\LanguageSwitcher.php
Line: 19
Function: _error_handler

File: C:\inetpub\wwwroot\index.php
Line: 315
Function: require_once