<?php
require_once __DIR__.'/vendor/autoload.php';

use Symfony\Component\Serializer\Mapping\Factory\ClassMetadataFactory;
use Symfony\Component\Serializer\Mapping\Loader\AnnotationLoader;
use Doctrine\Common\Annotations\AnnotationReader;
use Symfony\Component\Serializer\Serializer;
use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
use Symfony\Component\Serializer\Normalizer\ArrayDenormalizer;
use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
use Symfony\Component\PropertyInfo\Extractor\PhpDocExtractor;
use Symfony\Component\Serializer\Encoder\JsonEncoder;
use Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer;

interface SomeInterface {
    public function get(): void;
}
class SomeClass implements SomeInterface {
    public function get(): void {}
}
class FooBar {
    /**
     * @var class-string<SomeInterface>
     */
    private $foo;

    /**
     * @param class-string<SomeInterface> $foo
     */
    public function __construct(string $foo) {
        $this->foo = $foo;
    }

    /**
     * @return class-string<SomeInterface>
     */
    public function getFoo(): string
    {
        return $this->foo;
    }
}

$classMetadataFactory = new ClassMetadataFactory(new AnnotationLoader(new AnnotationReader()));
$serializer = new Serializer([
    new DateTimeNormalizer(),
    new ArrayDenormalizer(),
    new ObjectNormalizer($classMetadataFactory, null, null, new PhpDocExtractor()),
], [new JsonEncoder()]);

$serializer->deserialize('{"foo": "'.SomeClass::class.'"}', FooBar::class, 'json', [AbstractObjectNormalizer::SKIP_NULL_VALUES => true]);