A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Langswitch.php

Line Number: 10

Backtrace:

File: /home/s1du/public_html/application/modules/langswitch/controllers/Langswitch.php
Line: 10
Function: _error_handler

File: /home/s1du/public_html/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/s1du/public_html/system/core/Exceptions.php:271)

Filename: helpers/url_helper.php

Line Number: 561

Backtrace:

File: /home/s1du/public_html/application/modules/langswitch/controllers/Langswitch.php
Line: 64
Function: redirect

File: /home/s1du/public_html/index.php
Line: 315
Function: require_once