3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array('a' => 'a', 'b' => 'b', 'z' => array('c' => 'c', 'd' => 'd')); $b = array('a' => 'c', 'z' => array('c' => 'e')); var_dump(array_merge_recursive($a, $b));
Output for 4.3.0 - 7.2.0
array(3) { ["a"]=> array(2) { [0]=> string(1) "a" [1]=> string(1) "c" } ["b"]=> string(1) "b" ["z"]=> array(2) { ["c"]=> array(2) { [0]=> string(1) "c" [1]=> string(1) "e" } ["d"]=> string(1) "d" } }