A PHP Error was encountered

Severity: Warning

Message: Undefined array key "HTTP_REFERER"

Filename: controllers/Home.php

Line Number: 40

Backtrace:

File: D:\Newdata\mjd.co.th\httpdocs\application\controllers\Home.php
Line: 40
Function: _error_handler

File: D:\Newdata\mjd.co.th\httpdocs\index.php
Line: 315
Function: require_once