Online PHP editor | refs for QD2FD

<?php $birthDate = new DateTime(null); $birthDateNotNull = new DateTime('1989-09-26'); $serializeBirthDate = serialize($birthDate); $serializeBirthDateNotNull = serialize($birthDateNotNull); echo $serializeBirthDate; echo PHP_EOL; echo $serializeBirthDateNotNull; echo PHP_EOL; echo PHP_EOL; echo PHP_EOL; echo unserialize($serializeBirthDate); echo PHP_EOL; echo unserialize($serializeBirthDateNotNull); echo PHP_EOL; echo "#######################"; echo PHP_EOL; $perSmsDate = new DateTime(null); $perSmsDateNotNull = new DateTime('2015-12-07 20:40:25'); $serializePerSmsDate = serialize($perSmsDate); $serializePerSmsDateNotNull = serialize($perSmsDateNotNull); echo $serializePerSmsDate; echo PHP_EOL; echo $serializePerSmsDateNotNull; echo PHP_EOL; echo PHP_EOL; echo PHP_EOL; echo unserialize($serializePerSmsDate); echo PHP_EOL; echo unserialize($serializePerSmsDateNotNull);