A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Lang.php

Line Number: 18

Backtrace:

File: /home/smarttop/domains/smarttopauto.com/public_html/application/controllers/Lang.php
Line: 18
Function: _error_handler

File: /home/smarttop/domains/smarttopauto.com/public_html/index.php
Line: 327
Function: require_once