3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i = 0; $data = [0, 1,2,3,4,5,6,7,8,9]; foreach ($data as $item) { if ($i++ % 2 == 0) { echo $item . "\n"; } }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26, 8.1.0 - 8.1.13, 8.2rc1 - rc3
0 2 4 6 8

preferences:
18.03 ms | 409 KiB | 5 Q