A PHP Error was encountered

Severity: Notice

Message: Undefined variable: model_id

Filename: layout/popup.php

Line Number: 17

Backtrace:

File: /home/u154551926/domains/shelldoors.com/public_html/application/views/layout/popup.php
Line: 17
Function: _error_handler

File: /home/u154551926/domains/shelldoors.com/public_html/application/views/layout/footer-content.php
Line: 1
Function: view

File: /home/u154551926/domains/shelldoors.com/public_html/application/views/layout/footer.php
Line: 2
Function: view

File: /home/u154551926/domains/shelldoors.com/public_html/application/views/steel_doors.php
Line: 29
Function: view

File: /home/u154551926/domains/shelldoors.com/public_html/application/controllers/Welcome.php
Line: 241
Function: view

File: /home/u154551926/domains/shelldoors.com/public_html/index.php
Line: 315
Function: require_once