Error Identifier: property.finalPrivateHook

Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.

Code example #

<?php declare(strict_types = 1);

class Foo
{
	private string $name {
		final get => $this->name;
	}
}

Why is it reported? #

PHP does not allow a private property to have a final hook. The final modifier on a hook prevents child classes from overriding that hook, but private properties and their hooks are already invisible to child classes and cannot be overridden. Combining private visibility with a final hook is contradictory and results in a compile-time error in PHP 8.4+.

How to fix it #

Remove the final modifier from the hook, since private property hooks cannot be overridden anyway:

 <?php declare(strict_types = 1);
 
 class Foo
 {
 	private string $name {
-		final get => $this->name;
+		get => $this->name;
 	}
 }

If the hook needs to be final to prevent overriding, change the property visibility to protected or public:

 <?php declare(strict_types = 1);
 
 class Foo
 {
-	private string $name {
+	protected string $name {
 		final get => $this->name;
 	}
 }

Non-ignorable error #

This error cannot be ignored using @phpstan-ignore or the ignoreErrors configuration. Non-ignorable errors indicate code that would cause a crash or a fatal error at runtime, or a fundamental problem in the analysed code that must be addressed.

Rules that report this error #

PHPStan\Rules\Properties\PropertyInClassRule [1]

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