Online PHP editor | output for tdHfl

<?php class CustomDateTime extends \DateTime {} $dts = serialize(new \DateTime()); $dtis = serialize(new \DateTimeImmutable()); $cdts = serialize(new \CustomDateTime()); echo get_class(unserialize($dts, ['allowed_classes' => [\DateTime::class]])) . PHP_EOL; echo get_class(unserialize($dtis, ['allowed_classes' => [\DateTime::class]])) . PHP_EOL; echo PHP_EOL; echo get_class(unserialize($dts, ['allowed_classes' => [\DateTimeImmutable::class]])) . PHP_EOL; echo get_class(unserialize($dtis, ['allowed_classes' => [\DateTimeImmutable::class]])) . PHP_EOL; echo PHP_EOL; echo get_class(unserialize($dts, ['allowed_classes' => [\DateTimeInterface::class]])) . PHP_EOL; echo get_class(unserialize($dtis, ['allowed_classes' => [\DateTimeInterface::class]])) . PHP_EOL; echo PHP_EOL; echo get_class(unserialize($cdts, ['allowed_classes' => [\DateTime::class]])) . PHP_EOL; echo get_class(unserialize($cdts, ['allowed_classes' => [\DateTime::class]])) . PHP_EOL;