TYPO3 Core

Since PHP 8, native attributes are supported. In comparison to doc comments, attributes have auto-completion, are better readable and were "invented" for storing meta-information about properties. For more info on attributes see https://stitcher.io/blog/attributes-in-php-8 and https://www.php.net/manual/en/language.attributes.overview.php

Extbase annotations are already nearly 1:1 translatable to attributes.

The following annotations have been enriched for usage as attributes:

@Extbase\ORM\Transient
@Extbase\ORM\Cascade
@Extbase\ORM\Lazy
@Extbase\IgnoreValidation
@Extbase\Validate

Examples:

Before:

    /**
     * @Extbase\ORM\Cascade("remove")
     */

After:

    #[Extbase\ORM\Cascade(['value' => 'remove'])]

With promoted properties in constructor:

    public function __construct(
        #[Extbase\Validate(['validator' => 'StringLength', 'options' => ['minimum' => 1, 'maximum' => 10]])]
        #[Extbase\Validate(['validator' => 'NotEmpty'])]
        #[Extbase\Validate(['validator' => 'TYPO3.CMS.Extbase:NotEmpty'])]
        #[Extbase\Validate(['validator' => 'TYPO3.CMS.Extbase.Tests.Unit.Reflection.Fixture:DummyValidator'])]
        #[Extbase\Validate(['validator' => '\TYPO3\CMS\Extbase\Validation\Validator\NotEmptyValidator'])]
        #[Extbase\Validate(['validator' => NotEmptyValidator::class])]
        public readonly string $dummyPromotedProperty
    )
    {

    }