A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Common.php

Line Number: 40

Backtrace:

File: /home/bmwuhmyf/public_html/appalb/controllers/Common.php
Line: 40
Function: _error_handler

File: /home/bmwuhmyf/public_html/index.php
Line: 292
Function: require_once