A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Web_scanner.php

Line Number: 953

Backtrace:

File: /var/www/unitear-live/application/controllers/Web_scanner.php
Line: 953
Function: _error_handler

File: /var/www/unitear-live/index.php
Line: 315
Function: require_once