3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 1.001; var_dump(round(round($a,2)-round($a,8),2));
based on hieFb
Output for 5.2.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
float(-0)
Output for 4.3.0 - 5.2.0
float(0)