A PHP Error was encountered

Severity: Notice

Message: Undefined variable: adv_banner_type_head

Filename: controllers/Adv_payment.php

Line Number: 47

Backtrace:

File: /var/www/html/application/modules/conference/controllers/Adv_payment.php
Line: 47
Function: _error_handler

File: /var/www/html/index.php
Line: 317
Function: require_once