3v4l.org

run code in 500+ PHP versions simultaneously
<?php $n = 3; for ($i = 0; $i <= $n; $i++) { for ($j = 0; $j < $i; $j++) { echo '#'; } echo "\n"; }
Output for 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
# ## ###
preferences:
67.86 ms | 980 KiB | 4 Q