3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $header = array(); if (isset($header[0]['bla'])) { echo 'set'; } else { echo 'not set'; }
based on e10TK
Output for 4.3.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
not set
Output for hhvm-3.10.0

Process exited with code 153.