3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo round(-1 - 0.1 + 1 + 0.1, 12);
based on eoviV
Output for 5.6.0 - 5.6.30, hhvm-3.15.4 - 3.17.3, 7.0.0 - 7.3.0rc3
-0
Output for hhvm-3.12.14
0