A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 56

Filename: front/filter.php

Line Number: 16

Backtrace:

File: /var/www/vhosts/kpcea.org.tw/httpdocs/application/views/tw/front/filter.php
Line: 16
Function: _error_handler

File: /var/www/vhosts/kpcea.org.tw/httpdocs/application/libraries/Klib.php
Line: 400
Function: view

File: /var/www/vhosts/kpcea.org.tw/httpdocs/application/controllers/Filter.php
Line: 33
Function: frontView2

File: /var/www/vhosts/kpcea.org.tw/httpdocs/index.php
Line: 166
Function: require_once