A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/language_switcher.php

Line Number: 17

Backtrace:

File: C:\inetpub\wwwroot\rockwood\application\controllers\language_switcher.php
Line: 17
Function: _error_handler

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