3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $number = 15; $packed = pack('h*', dechex($number)); $v = unpack('h*', $packed); $v = hexdec($v[1]); var_dump($packed); var_dump($number); var_dump($v);
Output for 4.3.5 - 4.3.9, 4.3.11 - 4.4.1, 4.4.3 - 5.0.2, 5.0.5 - 5.1.1, 5.1.3 - 7.1.0
string(1) "" int(15) int(240)
Output for 4.4.2, 5.1.2
string(1) "" int(15) int(3840)
Output for 4.3.10, 5.0.3 - 5.0.4
Warning: unpack(): Type h: outside of string in /in/b2Wne on line 4 string(1) "" int(15) int(240)
Output for 4.3.0 - 4.3.4
Notice: Undefined offset: 1 in /in/b2Wne on line 5 string(1) "" int(15) int(0)