A PHP Error was encountered

Severity: Notice

Message: Use of undefined constant base_url - assumed 'base_url'

Filename: hkk/main_template.php

Line Number: 154

Backtrace:

File: /home/hkk/www/application/views/hkk/main_template.php
Line: 154
Function: _error_handler

File: /home/hkk/www/application/controllers/Hkk.php
Line: 838
Function: view

File: /home/hkk/www/index.php
Line: 315
Function: require_once