PHP Manual: Gets Attributes

Description

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

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

Parameters

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.

Return Values

Array of attributes, as a ReflectionAttribute object.

Examples

Example #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));
?>

The above example will output:

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

Example #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));
?>

The above example will output:

Array
(
    [0] => Fruit
)

Example #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));
?>

The above example will output:

Array
(
    [0] => Red
)

ReflectionClassConstant::getAttributes

Description

Parameters

Return Values

Examples

See Also