3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = '406429c28f5c28f6'; $num = unpack('d', $data); var_dump($num);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [1]=> float(5.704290899042211E-66) }
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
array(1) { [1]=> float(5.7042908990422E-66) }
Output for 4.3.0 - 4.3.4
array(1) { [""]=> float(5.7042908990422E-66) }
preferences:
224.45 ms | 401 KiB | 314 Q