3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a['c'] = 'a'; echo isset($a['b']); var_dump($a['b']);
Output for 5.3.0 - 7.1.0
Notice: Undefined index: b in /in/MXXZ7 on line 4 NULL
Output for 4.3.0 - 5.2.17
Notice: Undefined index: b in /in/MXXZ7 on line 4 NULL