3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array('a', 'b' => false, 'c'); var_dump(is_array($a['x']));
based on Ru3Y0
Output for 5.3.0 - 7.2.0
Notice: Undefined index: x in /in/Z4tMh on line 5 bool(false)
Output for 4.3.0 - 5.2.17
Notice: Undefined index: x in /in/Z4tMh on line 5 bool(false)