A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: front/product-list.php

Line Number: 921

Backtrace:

File: /var/www/html/nitsaholidays.in/application/views/front/product-list.php
Line: 921
Function: _error_handler

File: /var/www/html/nitsaholidays.in/application/views/front/template.php
Line: 5
Function: view

File: /var/www/html/nitsaholidays.in/application/controllers/ProductList.php
Line: 785
Function: view

File: /var/www/html/nitsaholidays.in/index.php
Line: 315
Function: require_once