3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo print_r(array('foo', 1), true); echo print_r(1, true); echo print_r('foo', true); echo print_r(null, true);
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => foo [1] => 1 ) 1foo
Output for hhvm-3.10.0

Process exited with code 153.