3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,array(3,4, array(5,6,7), 8), 9); $it = new RecursiveIteratorIterator(new RecursiveArrayIterator($a)); foreach($it as $v) { echo $v, " "; }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
1 2 3 4 5 6 7 8 9
preferences:
276.82 ms | 404 KiB | 415 Q