3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $username = $_POST['username']; if ($username == "letmein") { print ("Welcome back, friend!"); } else { print ("You're not a member of this site"); }
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
Notice: Undefined index: username in /in/kgRHD on line 3 You're not a member of this site