(PHP 8)
ReflectionParameter::getAttributes — Gets Attributes
Returns all attributes declared on this parameter as an array of ReflectionAttribute .
nameFilter 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.
Array of attributes, as a ReflectionAttribute object.
Example #1 Basic usage
<?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:
Array ( [0] => Fruit [1] => Red )
Example #2 Filtering results by class name
<?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:
Array ( [0] => Fruit )
Example #3 Filtering results by class name, with inheritance
<?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:
Array ( [0] => Red )