3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "Foo"; var_dump($a{4});
Output for 5.2.10 - 5.6.28, 7.0.0 - 7.1.0
Notice: Uninitialized string offset: 4 in /in/rRfvI on line 4 string(0) ""
Output for hhvm-3.10.0 - 3.12.0
string(0) ""
Output for 4.3.0 - 5.2.9
Notice: Uninitialized string offset: 4 in /in/rRfvI on line 4 string(0) ""