3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(-1); echo r;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant r - assumed 'r' in /in/CmDRi on line 4 r
Output for hhvm-3.12.0
Notice: Use of undefined constant r - assumed 'r' in /in/CmDRi on line -1 r