3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = 'abc'[-2]; echo $foo[-1];
based on tnfjL
Output for 7.1.0 - 7.3.0rc3
b
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.0.20
Notice: Uninitialized string offset: -2 in /in/H1fRo on line 3 Notice: Uninitialized string offset: -1 in /in/H1fRo on line 5