3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $n=1; while($n<=10) { echo ($n*2).' '; $n=$n+1; } ?>
based on JKdGA
Output for 4.3.0 - 7.2.0
2 4 6 8 10 12 14 16 18 20