3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump((int) '0xFF');
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.11.1, hhvm-3.13.2, hhvm-3.17.3, 7.0.0 - 7.1.7
int(0)
Output for hhvm-3.12.14, hhvm-3.15.4

Process exited with code 137.