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));
?>