3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump($_SESSION);
Output for 5.0.4 - 5.6.30, 7.0.0 - 7.2.0
Notice: Undefined variable: _SESSION in /in/EiBPm on line 2 NULL
Output for hhvm-3.10.1 - 3.11.1, hhvm-3.13.2 - 3.17.3
array(0) { }
Output for hhvm-3.12.14

Process exited with code 137.
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: _SESSION in /in/EiBPm on line 2 NULL