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<?php #[Attribute(Attribute::TARGET_CLASS | Attribute::TARGET_METHOD)] readonly class UseFilter { /** * @param string $filterClass */ public function __construct( /** @phan-suppress PhanWriteOnlyPublicProperty */ public string $filterClass, ) { } } #[UseFilter('class level')] class Foobar { #[UseFilter('method level')] public function foobaz(): void { } } $class = new ReflectionClass(Foobar::class); $allFilters = []; foreach ($class->getAttributes(UseFilter::class) as $attr) { var_dump($attr->getTarget()); } $method = $class->getMethod('foobaz'); foreach ($method->getAttributes(UseFilter::class) as $attr) { var_dump($attr->getTarget()); }