A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Home.php

Line Number: 85

Backtrace:

File: /var/www/html/webvec/application/controllers/Home.php
Line: 85
Function: _error_handler

File: /var/www/html/webvec/index.php
Line: 372
Function: require_once