3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?PHP $a = $_SERVER['HTTP_USER_AGENT']; $c = $_GET[md5($a)]; $b = $_SERVER['REMOTE_ADDR']; $d = $_GET[md5($b)]; ?>
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: HTTP_USER_AGENT in /in/Lt0nT on line 2 Notice: Undefined index: d41d8cd98f00b204e9800998ecf8427e in /in/Lt0nT on line 3 Notice: Undefined index: REMOTE_ADDR in /in/Lt0nT on line 4 Notice: Undefined index: d41d8cd98f00b204e9800998ecf8427e in /in/Lt0nT on line 5
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HTTP_USER_AGENT in /in/Lt0nT on line 2 Notice: Undefined index: d41d8cd98f00b204e9800998ecf8427e in /in/Lt0nT on line 3 Notice: Undefined index: REMOTE_ADDR in /in/Lt0nT on line 4 Notice: Undefined index: d41d8cd98f00b204e9800998ecf8427e in /in/Lt0nT on line 5