3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php header("LOcation: test.php"); echo $_SERVER["HTTP_HOST"];
Output for 5.5.0 - 7.1.0
Notice: Undefined index: HTTP_HOST in /in/TBoYK on line 3
Output for 4.3.0 - 5.4.45