3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $arr = array( null, 0, false, '' ); foreach ($arr as $key => $v) { echo "'", isset($arr[$key]), "'\n"; }
based on sb7hT
Output for 4.3.0 - 7.2.0
'' '1' '1' '1'