3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A { public $zero = 0; } $a = new A; var_dump(array_key_exists('zero', $a));
Output for 5.2.17 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(true)
Output for hhvm-3.10.0

Process exited with code 153.