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 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
# ## ###

preferences:
74.97 ms | 402 KiB | 65 Q