3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = '406429c28f5c28f6'; $num = unpack('d', $data); var_dump($num);
Output for 4.3.5 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [1]=> float(5.7042908990422E-66) }
Output for 4.3.0 - 4.3.4
array(1) { [""]=> float(5.7042908990422E-66) }