3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(isset($bar)); var_dump(empty($bar)); $bar = ''; var_dump(isset($bar)); var_dump(empty($bar));
based on 7fZVO
Output for 4.3.0 - 7.2.0
bool(false) bool(true) bool(true) bool(true)