3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $_SERVER['HTTP_HOST'];
Output for 5.3.0 - 5.6.30, hhvm-3.10.1 - 3.21.0, 7.0.0 - 7.1.8
Notice: Undefined index: HTTP_HOST in /in/8OoH2 on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HTTP_HOST in /in/8OoH2 on line 3