Home/ Manual/ reflection / reflectionparameter/ ReflectionParameter::getAttributes

ReflectionParameter::getAttributes

PHP function Edit on GitHub ✎

(PHP 8)

Gets Attributes

Description

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

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

Parameters

Return Values

Array of attributes, as a ReflectionAttribute object.

Examples

Basic usage

php

<?php
#[Attribute]
class Fruit {
}

#[Attribute]
class Red {
}

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

$reflection = new ReflectionFunction('fruitBasket');
$parameter = $reflection->getParameters()[0];
$attributes = $parameter->getAttributes();
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

The above example will output:

output

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

Filtering results by class name

php

<?php
#[Attribute]
class Fruit {
}

#[Attribute]
class Red {
}

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

$reflection = new ReflectionFunction('fruitBasket');
$parameter = $reflection->getParameters()[0];
$attributes = $parameter->getAttributes('Fruit');
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

The above example will output:

output

Array
(
    [0] => Fruit
)

Filtering results by class name, with inheritance

php

<?php
interface Color {
}

#[Attribute]
class Fruit {
}

#[Attribute]
class Red implements Color {
}

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

$reflection = new ReflectionFunction('fruitBasket');
$parameter = $reflection->getParameters()[0];
$attributes = $parameter->getAttributes('Color', ReflectionAttribute::IS_INSTANCEOF);
print_r(array_map(fn($attribute) => $attribute->getName(), $attributes));
?>

The above example will output:

output

Array
(
    [0] => Red
)

ReflectionParameter::getAttributes

Description

Parameters

Return Values

Examples

See Also