3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = serialize([]); var_dump($array, base64_encode($array), base64_encode('a:')); $object = serialize(new \stdClass()); var_dump($object, base64_encode($object), base64_encode('O:'));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(6) "a:0:{}" string(8) "YTowOnt9" string(4) "YTo=" string(19) "O:8:"stdClass":0:{}" string(28) "Tzo4OiJzdGRDbGFzcyI6MDp7fQ==" string(4) "Tzo="
preferences:
123.61 ms | 407 KiB | 5 Q