3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [1,2,3]; $a += [4,5,6]; var_dump($a);
based on jrFJl
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }