3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_export($_SERVER['SERVER_NAME']);
Output for 5.3.0 - 7.2.0
Notice: Undefined index: SERVER_NAME in /in/mBhk3 on line 3 NULL
Output for 4.3.0 - 5.2.17
Notice: Undefined index: SERVER_NAME in /in/mBhk3 on line 3 NULL