3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $x = '2d9'; $x++; // interprets '2d9' as hex, now $x == '2e0' $x++; // interprets '2e0' as a float, now $x == 3
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3