3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $var = NULL; var_dump(isset($var)); var_dump(array_key_exists('var', $GLOBALS));
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(false) bool(true)
Output for hhvm-3.10.0

Process exited with code 153.