3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php print_r(array('foo' => 1) + array('foo' => 2));
based on am3S3
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [foo] => 1 )
Output for hhvm-3.10.0

Process exited with code 153.