A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Tdc.php

Line Number: 2121

Backtrace:

File: /home/taiwancoolcom/application/controllers/Tdc.php
Line: 2121
Function: _error_handler

File: /home/taiwancoolcom/public_html/index.php
Line: 315
Function: require_once