Declare immutable constructor state with a PHP 8.1 readonly property: ~~~php final class User { public function __construct( public readonly string $id, ) { } } ~~~ A readonly property can be initialized once, so use it for values that must not change after construction.
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Declare immutable constructor state with a PHP 8.1 readonly property:
~~~php
final class User
{
public function __construct(
public readonly string $id,
) {
}
}
~~~
A readonly property can be initialized once, so use it for values that must not change after construction.
