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jiripudil/phpstan-sealed-classes
================================

Sealed classes support for PHPStan.

1.3.0(1y ago)35119.5k↓31.1%[1 issues](https://github.com/jiripudil/phpstan-sealed-classes/issues)4MITPHPPHP ^8.1CI passing

Since Nov 3Pushed 7mo ago4 watchersCompare

[ Source](https://github.com/jiripudil/phpstan-sealed-classes)[ Packagist](https://packagist.org/packages/jiripudil/phpstan-sealed-classes)[ GitHub Sponsors](https://github.com/jiripudil)[ RSS](/packages/jiripudil-phpstan-sealed-classes/feed)WikiDiscussions main Synced 1mo ago

READMEChangelog (3)Dependencies (7)Versions (5)Used By (4)

Important

This package is obsolete. You can now use the built-in [`@phpstan-sealed` annotation](https://phpstan.org/writing-php-code/phpdocs-basics#sealed-classes) introduced in PHPStan 2.1.18.

Sealed classes with PHPStan
===========================

[](#sealed-classes-with-phpstan)

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This extension adds support for sealed classes and interfaces to PHPStan.

Installation
------------

[](#installation)

To use this extension, require it via Composer

```
composer require --dev jiripudil/phpstan-sealed-classes
```

If you are using [`phpstan/extension-installer`](https://github.com/phpstan/extension-installer), this extension's configuration will be automatically enabled.

Otherwise, you need to include it explicitly in your `phpstan.neon`:

```
includes:
    - vendor/jiripudil/phpstan-sealed-classes/extension.neon
```

Usage
-----

[](#usage)

Sealed classes and interfaces allow developers to restrict class hierarchies: a sealed class can only be subclassed by classes that are explicitly permitted to do so. The same applies to sealed interfaces and their implementations. In a way, sealed classes are similar to enumerations, with an important distinction: while enums are singletons, a subclass of a sealed class can have *multiple* instances, each with its own state.

You can seal a class or an interface by attributing it as `#[Sealed]`. The attribute accepts a list of permitted descendants or implementations:

```