3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $len=\x10\x00\x00\x00; $len = unpack("V", $len); print $len ?>
based on 4o4Dv
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Undefined constant 'x10\x00\x00\x00' in /in/tv30N:3 Stack trace: #0 {main} thrown in /in/tv30N on line 3
Process exited with code 255.
Output for 5.3.20 - 5.6.28
Fatal error: Undefined constant 'x10\x00\x00\x00' in /in/tv30N on line 3
Process exited with code 255.