3v4l.org

run code in 300+ PHP versions simultaneously
<?php $size = 5; for($i=1; $i <= $size; $i++) { echo $i, ' '; } echo PHP_EOL; for($i=2; $i <= $size-1; $i++) { echo $i, str_repeat(' ', ($size-1) * 2 - 1), $size - $i + 1, PHP_EOL; } for($i=$size; $i > 0; $i--) { echo $i, ' '; }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 2 4 3 3 4 2 5 4 3 2 1
preferences:
164.06 ms | 404 KiB | 182 Q