3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $ip = gethostbyname($_SERVER['HTTP_X_FORWARDED_FOR']); echo $ip;
Output for 5.3.0 - 5.6.28, hhvm-3.10.0, 7.0.0 - 7.1.0
Notice: Undefined index: HTTP_X_FORWARDED_FOR in /in/6nCrd on line 2
Output for hhvm-3.12.0 - 3.13.2
Notice: Undefined index: HTTP_X_FORWARDED_FOR in /in/6nCrd on line 2 Warning: gethostbyname() expects parameter 1 to be string, null given in /in/6nCrd on line 2
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HTTP_X_FORWARDED_FOR in /in/6nCrd on line 2