A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 0

Filename: models/Product_model.php

Line Number: 42

Backtrace:

File: /home/site/wwwroot/application/models/Product_model.php
Line: 42
Function: _error_handler

File: /home/site/wwwroot/application/controllers/Collection.php
Line: 45
Function: _getCollectionById

File: /home/site/wwwroot/index.php
Line: 315
Function: require_once