classConstant.final

Code example

<?php declare(strict_types = 1);

class Base
{
	final public const VERSION = '1.0';
}

class Child extends Base
{
	public const VERSION = '2.0';
}

Why is it reported?

A class constant is overriding a constant that has been declared as final in a parent class or interface. Final constants cannot be overridden by child classes. This is a PHP language constraint enforced at runtime.

In the example above, Child::VERSION attempts to override Base::VERSION, which is declared as final.

This error is also reported when a class declares a final constant that overrides a non-final constant from a used trait. Trait constants must keep the same finality when redeclared.

How to fix it

Remove the overriding constant declaration from the child class:

 <?php declare(strict_types = 1);

 class Child extends Base
 {
-	public const VERSION = '2.0';
 }