3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo $_SERVER['REMOTE_HOST'];
Output for 5.3.0 - 7.1.7
Notice: Undefined index: REMOTE_HOST in /in/0qgfM on line 2
Output for 4.3.0 - 5.2.17
Notice: Undefined index: REMOTE_HOST in /in/0qgfM on line 2