A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'id' of non-object

Filename: controllers/Deliverybasket.php

Line Number: 1688

Backtrace:

File: /var/www/html/application/controllers/Deliverybasket.php
Line: 1688
Function: _error_handler

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