3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = 'foooooooo'; var_dump($x[0], $x[-1]);
Output for 7.1.0
string(1) "f" string(1) "o"
Output for 5.2.10 - 7.0.14
Notice: Uninitialized string offset: -1 in /in/YS5Ri on line 4 string(1) "f" string(0) ""
Output for 4.3.0 - 5.2.9
Notice: Uninitialized string offset: -1 in /in/YS5Ri on line 4 string(1) "f" string(0) ""