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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array(1, 2); $it = new ArrayIterator($array); while ($it->valid()) { echo $it->current(); $it->next(); } $it->append(3); echo $it->valid() ? $it->current() : "not valid"; var_dump($array);
Output for 5.2.4 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
123array(2) { [0]=> int(1) [1]=> int(2) }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.2.3
123array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: arrayiterator in /in/JhNBd on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: arrayiterator in /in/JhNBd on line 5