3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = new StdClass(); $c = $a; $a->b = 1; echo $c->b;
Output for 5.0.0 - 7.2.0
1
Output for 4.3.0 - 4.4.9
Notice: Undefined property: b in /in/5pUUG on line 5