3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = array( 'foo' => NULL, ); print_r($array + array('foo' => 'bar', 'baz' => 'fizz'));
Output for 4.3.0 - 7.2.0
Array ( [foo] => [baz] => fizz )