3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php putenv("foo=bar"); var_dump($_ENV['foo']);
Output for 5.3.0 - 5.6.26, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Notice: Undefined index: foo in /in/LgsBU on line 3 NULL
Output for 4.3.0 - 5.2.17
Notice: Undefined index: foo in /in/LgsBU on line 3 NULL