A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Anasayfa.php

Line Number: 1183

Backtrace:

File: /var/www/vhosts/netstudyo.com.tr/httpdocs/application/controllers/Anasayfa.php
Line: 1183
Function: _error_handler

File: /var/www/vhosts/netstudyo.com.tr/httpdocs/index.php
Line: 315
Function: require_once