A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_ACCEPT_LANGUAGE

Filename: core/MY_Controller.php

Line Number: 15

Backtrace:

File: D:\website\application\core\MY_Controller.php
Line: 15
Function: _error_handler

File: D:\website\application\controllers\Archive.php
Line: 6
Function: __construct

File: D:\website\index.php
Line: 316
Function: require_once