A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Unauthorized.php

Line Number: 24

Backtrace:

File: /home/dupak/public_html/htdocs/sipakdos/application/controllers/Unauthorized.php
Line: 24
Function: _error_handler

File: /home/dupak/public_html/htdocs/sipakdos/index.php
Line: 315
Function: require_once

access denied