A PHP Error was encountered

Severity: 8192

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

Filename: controllers/Halaman.php

Line Number: 53

Backtrace:

File: /workspace/application/controllers/Halaman.php
Line: 53
Function: substr

File: /workspace/index.php
Line: 316
Function: require_once

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