3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = '406429c28f5c28f6'; $num = pack('h', $data); var_dump($num);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(1) ""