Testing classes against complex types

complex-reflection.php

<?php
/*
Function to test a class type against a potentially complex type
Should handle Disjunctive Normal Form Types as well (A&B)|C|null
*/
function matchesType(string $class, ReflectionNamedType|ReflectionIntersectionType|ReflectionUnionType $type): bool
{
    if ($type instanceof ReflectionNamedType) {
        return is_a($class, $type->getName(), true);
    } else if ($type instanceof ReflectionIntersectionType) {
        foreach($type->getTypes() as $subType)
        {
            if(!matchesType($class, $subType))
            {
                return false;
            }
        }
        return true;
    } else if ($type instanceof ReflectionUnionType) {
        foreach($type->getTypes() as $subType)
        {
            if(matchesType($class, $subType))
            {
                return true;
            }
        }
        return false;
    }
}