reflection.php

<?php

class ReflectionType
{
  function allowsNull(): bool;
  function isBuiltin(): bool;
  function __toString(): string;
}

class ReflectionScalarType extends ReflectionType
{
  function getName(): string;
}

class ReflectionClassType extends ReflectionType
{
  function getName(): string;
  function getClass(): ReflectionClass;
}

class ReflectionCompositeType extends ReflectionType
{
  function getTypes(): ReflectionType[];
}

class ReflectionUnionType extends ReflectionCompositeType {}

class ReflectionIntersectionType extends ReflectionCompositeType {}