A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Language.php

Line Number: 21

Backtrace:

File: E:\InternetFiles\expressaoportinari.com.br\application\controllers\Language.php
Line: 21
Function: _error_handler

File: E:\InternetFiles\expressaoportinari.com.br\index.php
Line: 327
Function: require_once