3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $len='\x10\x00\x00\x00'; $len = unpack("V", $len); print $len ?>
Output for 7.0.0 - 7.2.0
Notice: Array to string conversion in /in/4o4Dv on line 5 Array
Output for 5.4.10 - 5.6.28
Notice: Array to string conversion in /in/4o4Dv on line 6 Array
Output for 5.3.20 - 5.3.29
Array