A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 1

Filename: libraries/Firewall.php

Line Number: 171

Backtrace:

File: /home/tramquantrac/public_html/application/libraries/Firewall.php
Line: 171
Function: _error_handler

File: /home/tramquantrac/public_html/application/core/MY_Controller.php
Line: 11
Function: open

File: /home/tramquantrac/public_html/application/controllers/Vindex.php
Line: 8
Function: __construct

File: /home/tramquantrac/public_html/index.php
Line: 306
Function: require_once