3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump($_SESSION);
Output for 5.0.4 - 5.6.29, 7.0.0 - 7.1.0
Notice: Undefined variable: _SESSION in /in/0a8Ie on line 3 NULL
Output for hhvm-3.10.0 - 3.13.2
array(0) { }
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: _SESSION in /in/0a8Ie on line 3 NULL