3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = array( 0, 1, 2 ); print_r ( array_keys($data) );
based on GbJ0M
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 0 [1] => 1 [2] => 2 )
Output for hhvm-3.10.0

Process exited with code 153.