A PHP Error was encountered

Severity: 8192

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

Filename: controllers/Main.php

Line Number: 216

Backtrace:

File: /home/bakas/applicationNew/controllers/Main.php
Line: 216
Function: _error_handler

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