3v4l.org

run code in 300+ 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 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
# ## ###

preferences:
69.93 ms | 406 KiB | 5 Q