3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = printf; $a("hallo");
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant printf - assumed 'printf' in /in/vfd50 on line 2 hallo
Output for hhvm-3.10.0

Process exited with code 153.