3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1.001; var_dump(round($a,2)-round($a,8));
based on KEEnN
Output for 4.3.0 - 7.1.7, 7.1.20 - 7.2.6
float(-0.00099999999999989)
Output for 7.1.10

Process exited with code 137.