3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class cywm528 {} $obj = unserialize('O:7:"cywm528":0xx}'); var_dump($obj);
Output for 5.0.0 - 7.1.0
object(cywm528)#1 (0) { }
Output for 4.3.0 - 4.4.9
object(cywm528)(0) { }