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    ReflectionFunctionAbstract::getAttributes

    (PHP 8)

    ReflectionFunctionAbstract::getAttributes — Gets Attributes

    说明

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

    Returns all attributes declared on this function or method as an array of ReflectionAttribute.

    参数

    name

    过滤结果，匹配此类名，仅包含 ReflectionAttribute 实例的属性。

    flags

    如果提供了 name，则用于确定如何过滤结果的 flag。

    默认值为 0，这将导致返回的结果只属于类 name 的属性。

    唯一可用的其他选项是使用 ReflectionAttribute::IS_INSTANCEOF，它将改为使用 instanceof 进行过滤。

    返回值

    Array of attributes, as a ReflectionAttribute object.

    示例

    示例 #1 Basic usage with a class method

    <?php
    #[Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red {
    }

    class     Factory {
    #[    Fruit]
    #[    Red]
    public function     makeApple(): string
    {
    return     'apple';
    }
    }

    $method = new ReflectionMethod('Factory', 'makeApple');
    $attributes = $method->getAttributes();
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    以上示例会输出：

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

    示例 #2 Basic usage with a function

    <?php
    #[Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red {
    }

    #[    Fruit]
    #[    Red]
    function     makeApple(): string
    {
    return     'apple';
    }

    $function = new ReflectionFunction('makeApple');
    $attributes = $function->getAttributes();
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    以上示例会输出：

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

    示例 #3 Filtering results by class name

    <?php
    #[Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red {
    }

    #[    Fruit]
    #[    Red]
    function     makeApple(): string
    {
    return     'apple';
    }

    $function = new ReflectionFunction('makeApple');
    $attributes = $function->getAttributes('Fruit');
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    以上示例会输出：

    Array
(
    [0] => Fruit
)

    示例 #4 Filtering results by class name, with inheritance

    <?php
    interface Color {
    }

    #[    Attribute]
    class     Fruit {
    }

    #[    Attribute]
    class     Red implements Color {
    }

    #[    Fruit]
    #[    Red]
    function     makeApple(): string
    {
    return     'apple';
    }

    $function = new ReflectionFunction('makeApple');
    $attributes = $function->getAttributes('Color', ReflectionAttribute::IS_INSTANCEOF);
    print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
    ?>

    以上示例会输出：

    Array
(
    [0] => Red
)

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