3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function a($b, $c = null) { return func_num_args(); } var_dump(a('3'));
based on 9aVIH
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(1)