property.abstractFinal

Code example

<?php declare(strict_types = 1);

abstract class Foo
{
	abstract public string $name {
		final get;
	}
}

Why is it reported?

A property (or its hook) cannot be both abstract and final. The abstract modifier requires subclasses to provide an implementation, while final prevents subclasses from overriding it. These two modifiers are mutually exclusive and combining them is a contradiction that PHP does not allow.

In the example above, the property is declared abstract and the get hook is declared final without a body. A final hook without a body is still abstract (it has no implementation), so this creates a conflict -- the hook would need to be implemented by subclasses but the final modifier prevents that.

How to fix it

Remove the final modifier from the abstract hook:

 abstract class Foo
 {
 	abstract public string $name {
-		final get;
+		get;
 	}
 }

Or provide an implementation and use final to prevent further overriding:

-abstract class Foo
+class Foo
 {
-	abstract public string $name {
-		final get;
+	public string $name {
+		final get => 'default';
 	}
 }