A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Playlist.php

Line Number: 18

Backtrace:

File: /home/webdpk/public_html/application/controllers/Playlist.php
Line: 18
Function: _error_handler

File: /home/webdpk/public_html/index.php
Line: 315
Function: require_once