A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_ACCEPT_LANGUAGE

Filename: core/FrontEndController.php

Line Number: 23

Backtrace:

File: /home/artus/public_html/application/core/FrontEndController.php
Line: 23
Function: _error_handler

File: /home/artus/public_html/application/core/FrontEndController.php
Line: 88
Function: _get_prefered_lang

File: /home/artus/public_html/application/controllers/frontend/Categories.php
Line: 10
Function: __construct

File: /home/artus/public_html/index.php
Line: 287
Function: require_once