A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Home.php

Line Number: 61

Backtrace:

File: XXXXXXXXXX\vhosts\odb.om\httpdocs\application\controllers\Home.php
Line: 61
Function: _error_handler

File: XXXXXXXXXX\vhosts\odb.om\httpdocs\index.php
Line: 315
Function: require_once