136 lines
4.1 KiB
YAML
136 lines
4.1 KiB
YAML
uuid:
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- value: 70c71a01-1c5a-4b25-8706-d02a4284662e
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langcode:
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- value: en
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target_uuid: 8bde1f2f-eef9-4f2d-ae9c-96921f8193d7
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revision_timestamp:
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- value: '2025-05-11T09:00:01+00:00'
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target_uuid: b8966985-d4b2-42a7-a319-2e94ccfbb849
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target_uuid: b8966985-d4b2-42a7-a319-2e94ccfbb849
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title:
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- value: 'Using readonly in PHP'
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created:
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- value: '2025-02-13T00:00:00+00:00'
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changed:
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- value: '2025-05-11T09:00:01+00:00'
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path:
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- alias: /daily/2025/02/13/readonly
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langcode: en
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body:
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- value: |
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<p>Since PHP 8.1, properties on PHP classes have been able to be marked as <code>readonly</code>.</p>
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<p>Once they've been set, they can't be changed or overwritten.</p>
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<p>This is great for data transfer objects (DTOs) that you want to be immutable and know the values are the same as when they were set.</p>
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<p>Here's an example:</p>
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<pre><code class="php">class MyDto {
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public function __construct(
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public readonly string $name,
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public readonly int $age,
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) {
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}
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}
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</code></pre>
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<p>I don't need to make the properties private or protected and write getter methods for them.</p>
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<p>I can make them public, knowing the values can't be changed.</p>
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<h2 id="readonly-classes">readonly classes</h2>
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<p>Since PHP 8.2, the entire class can be <code>readonly</code>, making the code cleaner and easier to read.</p>
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<p>This class does the same as the previous example:</p>
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<pre><code class="php">readonly class MyDto {
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public function __construct(
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public string $name,
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public int $age,
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) {
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}
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}
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</code></pre>
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<h2 id="here%27s-the-thing">Here's the thing</h2>
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<p>This is a great example of how the PHP language continues to evolve and improve, and it's been a great way to make it easier to keep my code clean and with fewer bugs.</p>
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<p>If you want a way to easily add <code>readonly</code> to properties or classes, <a href="/daily/2025/01/31/rector">take a look at Rector</a> which can automate it for you.</p>
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format: full_html
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processed: |
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<p>Since PHP 8.1, properties on PHP classes have been able to be marked as <code>readonly</code>.</p>
|
|
|
|
<p>Once they've been set, they can't be changed or overwritten.</p>
|
|
|
|
<p>This is great for data transfer objects (DTOs) that you want to be immutable and know the values are the same as when they were set.</p>
|
|
|
|
<p>Here's an example:</p>
|
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<pre><code class="php">class MyDto {
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public function __construct(
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public readonly string $name,
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public readonly int $age,
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) {
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}
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}
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</code></pre>
|
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<p>I don't need to make the properties private or protected and write getter methods for them.</p>
|
|
|
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<p>I can make them public, knowing the values can't be changed.</p>
|
|
|
|
<h2 id="readonly-classes">readonly classes</h2>
|
|
|
|
<p>Since PHP 8.2, the entire class can be <code>readonly</code>, making the code cleaner and easier to read.</p>
|
|
|
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<p>This class does the same as the previous example:</p>
|
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<pre><code class="php">readonly class MyDto {
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public function __construct(
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public string $name,
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public int $age,
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) {
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}
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}
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</code></pre>
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<h2 id="here%27s-the-thing">Here's the thing</h2>
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<p>This is a great example of how the PHP language continues to evolve and improve, and it's been a great way to make it easier to keep my code clean and with fewer bugs.</p>
|
|
|
|
<p>If you want a way to easily add <code>readonly</code> to properties or classes, <a href="http://default/daily/2025/01/31/rector">take a look at Rector</a> which can automate it for you.</p>
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summary: null
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field_daily_email_cta: { }
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