3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a1 = array('a', 'b'); $a2 = array('foo' => 'a', 'bar' => 'b'); $a1+= $a2; print_r($a1);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => a [1] => b [foo] => a [bar] => b )