A PHP Error was encountered

Severity: Notice

Message: Undefined index: user_id

Filename: controllers/Login.php

Line Number: 17

Backtrace:

File: /home/fonelineonline2/public_html/earthnav/public/application/controllers/Login.php
Line: 17
Function: _error_handler

File: /home/fonelineonline2/public_html/earthnav/public/index.php
Line: 315
Function: require_once