3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = ''; $b = 'hello'; if(isset($a[$b]['RML_ZONE'])){ print 'Empty'; }
Output for 4.3.0 - 5.2.9, 5.3.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.10 - 5.3.5
Notice: Uninitialized string offset: 0 in /in/gkBdW on line 4