From e73a211acd5a4c27432999f0c78249230b752015 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.uk>
Date: Sun, 16 Apr 2023 10:30:10 +0100
Subject: [PATCH] daily-email: add 2023-04-16

---
 src/content/daily-email/2023-04-16.md | 39 +++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/content/daily-email/2023-04-16.md

diff --git a/src/content/daily-email/2023-04-16.md b/src/content/daily-email/2023-04-16.md
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+---
+title: >
+  Refactoring with readonly classes in PHP 8.2
+pubDate: 2023-04-16
+permalink: >
+  archive/2023/04/16/refactoring-with-readonly-classes-in-php-8-2
+tags:
+  - php
+---
+
+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:
+
+```php
+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`:
+
+```php
+readonly class AccountDetails {
+
+  public function __construct(
+    public string $accountNumber,
+    public string $sortCode,
+  ) {}
+  
+}
+```
+
+Thanks for the suggestion, Marian!