3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo $_SERVER["HTTP_HOST"]; ?>
based on JOY4O
Output for 5.3.0 - 7.2.0
Notice: Undefined index: HTTP_HOST in /in/U6kSP on line 2
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HTTP_HOST in /in/U6kSP on line 2