3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo 2 ** 3 ** 2;
Output for 5.6.7 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
512
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.5.35
Parse error: syntax error, unexpected '*' in /in/b9bMj on line 2
Process exited with code 255.