3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $array = array(0 => 200, '730404' => 89730 ,'730205' => 1000 ,'730100' => 1000 ,'730601' => 2184); $key='730404'; $keys = array_keys($array,$key); print_r($keys); ?>
Output for 4.3.0 - 7.2.0
Array ( )