A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Home.php

Line Number: 198

Backtrace:

File: /home/tutortrip/public_html/application/controllers/Home.php
Line: 198
Function: _error_handler

File: /home/tutortrip/public_html/index.php
Line: 316
Function: require_once