3v4l.org

run code in 300+ PHP versions simultaneously
<?php $it = new ArrayIterator([]); $it->next(); var_export($it->current());
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6
NULL

preferences:
53.68 ms | 409 KiB | 5 Q