A PHP Error was encountered

Severity: 8192

Message: strtoupper(): Passing null to parameter #1 ($string) of type string is deprecated

Filename: controllers/Category_controller.php

Line Number: 106

Backtrace:

File: /home/statsmarket/public_html/application/controllers/Category_controller.php
Line: 106
Function: strtoupper

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