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run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = array("one"=>1,"two"=>2,"three"=>3); $o = new ArrayObject($arr); foreach ($o as $key=>$val){ echo $key . ' => ' . $val, "\n"; }
based on WEglS
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
one => 1 two => 2 three => 3
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/RSJR3 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: arrayobject in /in/RSJR3 on line 3