3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo $_SERVER['HOST_NAME'];
Output for 5.3.0 - 7.1.0
Notice: Undefined index: HOST_NAME in /in/aohei on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HOST_NAME in /in/aohei on line 3