3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $def = array( 1 => 1, 2 => 1, 3 => 1); $fill = array( 2 => 0 ); $res = array_merge($def, $fill); print_r($res);
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 1 [1] => 1 [2] => 1 [3] => 0 )