A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_USER_AGENT

Filename: core/Common_Controller.php

Line Number: 28

Backtrace:

File: /data/home/hyu1581410001/htdocs/application/core/Common_Controller.php
Line: 28
Function: _error_handler

File: /data/home/hyu1581410001/htdocs/application/core/MY_Controller.php
Line: 8
Function: __construct

File: /data/home/hyu1581410001/htdocs/application/controllers/M_index.php
Line: 9
Function: __construct

File: /data/home/hyu1581410001/htdocs/index.php
Line: 322
Function: require_once

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