3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "Hello World!"; var_dump($a[0][0]);
Output for 5.4.0 - 7.1.0
string(1) "H"
Output for 5.0.0 - 5.3.29
Fatal error: Cannot use string offset as an array in /in/ncCK4 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.4.9
NULL