3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = []; $a["1"] = 1; $a["-1"] = -1; print_r($a);
based on LdH3B
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
Array ( [1] => 1 [-1] => -1 )