3v4l.org

run code in 300+ PHP versions simultaneously
<?php $result = [1,2,3,4]; $row = end($result); while($row = current($result)){ echo $row."\n\n"; prev($result); }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
4 3 2 1
preferences:
152.93 ms | 1565 KiB | 4 Q