3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [null => '000', 1 => '111' ]; var_dump($a[null]); $a[null] = 'null'; //var_dump($a['']);
based on GTj4u
Output for 5.5.0 - 7.3.1
string(3) "000"