3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $options = [ 'where' => [ 'EXTID' => '1234fad34' ], 'web' => 2, ]; $options = array_merge_recursive($options, ['where' => ['web' => 1]]) ; var_dump($options); die();
based on HUNcV
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
array(2) { ["where"]=> array(2) { ["EXTID"]=> string(9) "1234fad34" ["web"]=> int(1) } ["web"]=> int(2) }