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---
title: >
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Refactoring with readonly classes in PHP 8.2
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pubDate: 2023-04-16
permalink: >-
daily/2023/04/16/refactoring-with-readonly-classes-in-php-8-2
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tags:
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- php
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---
Marian Kostadinov ([stochnagara on Twitter](https://twitter.com/stochnagara)) replied to Friday's email about DTOs and value objects to tell me about `readonly` classes, which can be done in PHP 8.2.
Looking at the previous class:
```language-php
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class AccountDetails {
public function __construct(
public readonly string $accountNumber,
public readonly string $sortCode,
) {}
}
```
Instead of setting each property as `readonly`, the whole class can instead be marked as `readonly`:
```language-php
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readonly class AccountDetails {
public function __construct(
public string $accountNumber,
public string $sortCode,
) {}
}
```
Thanks for the suggestion, Marian!