A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: core/MY_Controller.php

Line Number: 213

Backtrace:

File: D:\Plesk\vhosts\samnon.com\httpdocs\application\core\MY_Controller.php
Line: 213
Function: _error_handler

File: D:\Plesk\vhosts\samnon.com\httpdocs\index.php
Line: 306
Function: require_once