A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Controller.php

Line Number: 538

Backtrace:

File: /home/altincuzdan/public_html/ac_bedirhan/app2/application/controllers/Controller.php
Line: 538
Function: _error_handler

File: /home/altincuzdan/public_html/ac_bedirhan/app2/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/altincuzdan/public_html/ac_bedirhan/app2/system/core/Exceptions.php:271)

Filename: controllers/Controller.php

Line Number: 538

Backtrace:

File: /home/altincuzdan/public_html/ac_bedirhan/app2/application/controllers/Controller.php
Line: 538
Function: header

File: /home/altincuzdan/public_html/ac_bedirhan/app2/index.php
Line: 315
Function: require_once