3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?PHP echo 0X0 + 2e1; echo "\n";
Output for 5.6.0 - 5.6.30, hhvm-3.15.4 - 3.17.3, 7.0.0 - 7.3.0alpha1
20
Output for hhvm-3.12.14

Process exited with code 137.