A PHP Error was encountered

Severity: Notice

Message: Undefined index: firstName

Filename: views/header.php

Line Number: 210

Backtrace:

File: /var/www/html/application/views/header.php
Line: 210
Function: _error_handler

File: /var/www/html/application/views/view_shop.php
Line: 20
Function: include

File: /var/www/html/application/controllers/Shop.php
Line: 9
Function: view

File: /var/www/html/index.php
Line: 315
Function: require_once