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    ReflectionParameter::getAttributes

    (PHP 8)

    ReflectionParameter::getAttributes — Gets Attributes

    Descrizione

    public ReflectionParameter::getAttributes(?string $name = null, int $flags = 0): array

    Returns all attributes declared on this parameter as an array of ReflectionAttribute.

    Elenco dei parametri

    name

    Filter the results to include only ReflectionAttribute instances for attributes matching this class name.

    flags

    Flags for determining how to filter the results, if name is provided.

    Default is 0 which will only return results for attributes that are of the class name.

    The only other option available, is to use ReflectionAttribute::IS_INSTANCEOF, which will instead use instanceof for filtering.

    Valori restituiti

    Array of attributes, as a ReflectionAttribute object.

    Esempi

    Example #1 Basic usage

    <?php
    #[Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red {
    }

    function     fruitBasket(
    #[    Fruit]
    #[    Red]
    string $apple
    ) { }

    $reflection = new ReflectionFunction('fruitBasket');
    $parameter = $reflection->getParameter('apple');
    $attributes = $parameter->getAttributes();
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    Il precedente esempio visualizzerà:

    Array
(
    [0] => Fruit
    [1] => Red
)

    Example #2 Filtering results by class name

    <?php
    #[Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red {
    }

    function     fruitBasket(
    #[    Fruit]
    #[    Red]
    string $apple
    ) { }

    $reflection = new ReflectionFunction('fruitBasket');
    $parameter = $reflection->getParameter('apple');
    $attributes = $parameter->getAttributes('Fruit');
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    Il precedente esempio visualizzerà:

    Array
(
    [0] => Fruit
)

    Example #3 Filtering results by class name, with inheritance

    <?php
    interface Color {
    }

    #[    Attribute]
    class     Fruit {
    }

    function     fruitBasket(
    #[    Fruit]
    #[    Red]
    string $apple
    ) { }

    $reflection = new ReflectionFunction('fruitBasket');
    $parameter = $reflection->getParameter('apple');
    $attributes = $parameter->getAttributes('Color', ReflectionAttribute::IS_INSTANCEOF);
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    Il precedente esempio visualizzerà:

    Array
(
    [0] => Red
)

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