A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 1

Filename: controllers/Product.php

Line Number: 90

Backtrace:

File: /var/www/vhosts/khtessence.com.tw/httpdocs/application/controllers/Product.php
Line: 90
Function: _error_handler

File: /var/www/vhosts/khtessence.com.tw/httpdocs/index.php
Line: 315
Function: require_once