A PHP Error was encountered

Severity: 8192

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

Filename: views/singleproducts1.php

Line Number: 7

Backtrace:

File: /var/www/html/application/views/singleproducts1.php
Line: 7
Function: strtolower

File: /var/www/html/application/controllers/Home.php
Line: 2903
Function: view

File: /var/www/html/index.php
Line: 316
Function: require_once