3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php error_reporting(E_ALL); $foo = 'hello'; echo $foo[0]; echo $foo[0][0];
Output for 5.4.0 - 7.2.0
hh
Output for 5.0.0 - 5.3.29
h Fatal error: Cannot use string offset as an array in /in/r5PJ4 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.4.9
h