3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $test = []; var_dump(filter_input(INPUT_POST, 'country', FILTER_SANITIZE_NUMBER_INT));
based on S0Z0J
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
NULL