A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Purchase.php

Line Number: 15

Backtrace:

File: /home/u924740507/domains/pweducation.in/public_html/application/controllers/Purchase.php
Line: 15
Function: _error_handler

File: /home/u924740507/domains/pweducation.in/public_html/index.php
Line: 336
Function: require_once