A PHP Error was encountered

Severity: Notice

Message: Undefined index: user_id

Filename: default/referrals.php

Line Number: 30

Backtrace:

File: /home/unifjteo/public_html/shareviral.net/application/views/templates/default/referrals.php
Line: 30
Function: _error_handler

File: /home/unifjteo/public_html/shareviral.net/application/controllers/DefaultController.php
Line: 279
Function: view

File: /home/unifjteo/public_html/shareviral.net/application/controllers/PageController.php
Line: 282
Function: _load_client_views

File: /home/unifjteo/public_html/shareviral.net/index.php
Line: 322
Function: require_once