classConstant.finalNotSupported

Code example

<?php declare(strict_types = 1);

class Foo
{
    final public const BAR = 'baz'; // reported
}

Why is it reported?

The final modifier for class constants was introduced in PHP 8.1. Using it with an earlier PHP version results in a syntax error. PHPStan reports this when the configured PHP version does not support final constants.

How to fix it

If upgrading to PHP 8.1 or later is not possible, remove the final modifier from the constant declaration.

 class Foo
 {
-    final public const BAR = 'baz';
+    public const BAR = 'baz';
 }