attributes.txt

namespace Entity;

#[MyAttribute]
#[\MyExample\MyAttribute]
#[MyAttribute(1234)]
#[MyAttribute(value: 1234)]
#[ASSERT(value: 1234)]
#[HTMLAttribute(tag: "h1")]
#[MyAttribute(MyAttribute::VALUE)]
#[MyAttribute(array("key" => "value"))]
#[MyAttribute(100 + 200)]
class Foo {}

#[MyAttribute(1234), MyAttribute(5678)]
class Bar
{
    #[Assert\IsTrue(message: 'The password cannot match your given name')]
    public function isPasswordSafe()
    {
    }

    #[Assert\AtLeastOneOf([
        new Assert\Count(min: 2),
        new Assert\All(
           new Assert\GreaterThanOrEqual(7)
        ),
    ])]
    public $stuff;
}

class Book
{
    #[Assert\Choice(
        choices: ['blue', 'green'],
        message: 'Choose a valid color.',
    )]
    private $color;

    #[Assert\Choice(['Hardcover', 'Paperback'])]
    private $format;

    #[
         Assert\Collection(
             fields: [
                 'authorEmail' => new Assert\Email,
                 'shortDesc' => [
                     /*something*/
                     new Assert\NotBlank,
                     new Assert\Length(
                         max: 200,
                         maxMessage: 'Your short desc is too long'
                     )
                 ],
             ],
             allowMissingFields: true,
        )
    ]
    protected $additionalData;
}