3v4l.org

run code in 500+ PHP versions simultaneously
<?php $n = 10; while ($n --> 0) print $n . PHP_EOL;
Output for 5.6.38, 7.0.33, 7.1.25 - 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
9 8 7 6 5 4 3 2 1 0
preferences:
114.87 ms | 1492 KiB | 4 Q