A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Cart.php

Line Number: 250

Backtrace:

File: /home/wellhtech/domains/wellhtech.com/public_html/application/controllers/Cart.php
Line: 250
Function: _error_handler

File: /home/wellhtech/domains/wellhtech.com/public_html/index.php
Line: 316
Function: require_once