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ReflectionClassConstant::getAttributes

(PHP 8)

ReflectionClassConstant::getAttributesGets Attributes

Descrição

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

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

Parâmetros

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.

Valor Retornado

Array of attributes, as a ReflectionAttribute object.

Exemplos

Exemplo #1 Basic usage

<?php
#[Attribute]
class Fruit {
}

#[Attribute]
class Red {
}

class
Basket {
#[Fruit]
#[Red]
public const APPLE = 'apple';
}

$classConstant = new ReflectionClassConstant('Basket', 'APPLE');
$attributes = $classConstant->getAttributes();
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

O exemplo acima irá imprimir:

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

Exemplo #2 Filtering results by class name

<?php
#[Attribute]
class Fruit {
}

#[Attribute]
class Red {
}

class
Basket {
#[Fruit]
#[Red]
public const APPLE = 'apple';
}

$classConstant = new ReflectionClassConstant('Basket', 'APPLE');
$attributes = $classConstant->getAttributes('Fruit');
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

O exemplo acima irá imprimir:

Array
(
    [0] => Fruit
)

Exemplo #3 Filtering results by class name, with inheritance

<?php
interface Color {
}

#[Attribute]
class Fruit {
}

#[Attribute]
class Red implements Color {
}

class
Basket {
#[Fruit]
#[Red]
public const APPLE = 'apple';
}

$classConstant = new ReflectionClassConstant('Basket', 'APPLE');
$attributes = $classConstant->getAttributes('Color', ReflectionAttribute::IS_INSTANCEOF);
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

O exemplo acima irá imprimir:

Array
(
    [0] => Red
)

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