3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo $_SERVER[HTTP_HOST];
Output for 5.3.0 - 7.1.0
Notice: Use of undefined constant HTTP_HOST - assumed 'HTTP_HOST' in /in/pDcJ2 on line 2 Notice: Undefined index: HTTP_HOST in /in/pDcJ2 on line 2
Output for 4.3.0 - 5.2.17
Notice: Use of undefined constant HTTP_HOST - assumed 'HTTP_HOST' in /in/pDcJ2 on line 2 Notice: Undefined index: HTTP_HOST in /in/pDcJ2 on line 2