3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function wer($x) { echo $x; } $e = 'ert'; call_user_func('wer', $e);
based on QT9Gd
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.1
ert