3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; while ($a < 5) { $a = $a + $a; $a++; echo $a . ','; }
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
3,7,