oliverdavies.uk/content/node.9d0e577d-eca2-4b05-9266-00f94901ae69.yml

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title:
  - value: |
      Refactoring with readonly classes in PHP 8.2
created:
  - value: '2023-04-16T00:00:00+00:00'
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body:
  - value: |
      <p>Marian Kostadinov (<a href="https://twitter.com/stochnagara">stochnagara on Twitter</a>) replied to Friday's email about DTOs and value objects to tell me about <code>readonly</code> classes, which can be done in PHP 8.2.</p>

      <p>Looking at the previous class:</p>

      <pre><code class="language-php">class AccountDetails {

        public function __construct(
          public readonly string $accountNumber,
          public readonly string $sortCode,
        ) {}

      }
      </code></pre>

      <p>Instead of setting each property as <code>readonly</code>, the whole class can instead be marked as <code>readonly</code>:</p>

      <pre><code class="language-php">readonly class AccountDetails {

        public function __construct(
          public string $accountNumber,
          public string $sortCode,
        ) {}

      }
      </code></pre>

      <p>Thanks for the suggestion, Marian!</p>

              
    format: full_html
    processed: |
      <p>Marian Kostadinov (<a href="https://twitter.com/stochnagara">stochnagara on Twitter</a>) replied to Friday's email about DTOs and value objects to tell me about <code>readonly</code> classes, which can be done in PHP 8.2.</p>

      <p>Looking at the previous class:</p>

      <pre><code class="language-php">class AccountDetails {

        public function __construct(
          public readonly string $accountNumber,
          public readonly string $sortCode,
        ) {}

      }
      </code></pre>

      <p>Instead of setting each property as <code>readonly</code>, the whole class can instead be marked as <code>readonly</code>:</p>

      <pre><code class="language-php">readonly class AccountDetails {

        public function __construct(
          public string $accountNumber,
          public string $sortCode,
        ) {}

      }
      </code></pre>

      <p>Thanks for the suggestion, Marian!</p>

              
    summary: null
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