3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = 'hello'; echo $str[-1];
Output for 7.1.0
o
Output for 5.2.10 - 5.6.21, 7.0.0 - 7.0.14
Notice: Uninitialized string offset: -1 in /in/j3NT9 on line 4
Output for hhvm-3.10.0 - 3.12.0
Output for 4.3.0 - 5.2.9
Notice: Uninitialized string offset: -1 in /in/j3NT9 on line 4