Breaking: #107229 - Removed support for annotations in Extbase 

Description 

Extbase no longer supports PHP annotations for models, data transfer objects (DTOs), and controller actions. Use PHP attributes (for example #[Extbase\Validate]) instead. Attributes provide the same functionality with better performance and native language support.

Extbase previously relied on annotation parsing, typically detected when the annotation namespace was imported, for example:

use TYPO3\CMS\Extbase\Annotation as Extbase;
use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;

class MyModel extends AbstractEntity
{
    /**
     * @Extbase\Validate("NotEmpty")
     */
    protected string $foo = '';
}

Since TYPO3 now requires PHP 8.2 as the minimum version, the use of native PHP attributes is preferred. All Extbase-related annotations have been available as PHP attributes since TYPO3 v12.

Impact 

By dropping support for Extbase annotations, only PHP attributes are now supported. This provides more type safety and better integration with PHP’s language features. Developers benefit from a cleaner, faster, and more reliable implementation without the need for the deprecated third-party annotation parser.

Affected installations 

All Extbase models, Data Transfer Objects (DTOs), and controllers that use Extbase annotations are affected. This includes built-in annotations such as Cascade, Lazy, and Validate, as well as any custom annotation implementations.

Migration 

Switch from Extbase annotations to native PHP attributes.

use TYPO3\CMS\Extbase\Annotation as Extbase;
use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;

class MyModel extends AbstractEntity
{
    /**
     * @Extbase\Validate("NotEmpty")
     */
    protected string $foo = '';
}

use TYPO3\CMS\Extbase\Attribute as Extbase;
use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;

class MyModel extends AbstractEntity
{
    #[Extbase\Validate(['validator' => 'NotEmpty'])]
    protected string $foo = '';
}