A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_ACCEPT_LANGUAGE

Filename: controllers/Main.php

Line Number: 19

Backtrace:

File: /var/www/vhosts/vestamuhendislik.com.tr/httpdocs/application/controllers/Main.php
Line: 19
Function: _error_handler

File: /var/www/vhosts/vestamuhendislik.com.tr/httpdocs/index.php
Line: 318
Function: require_once