3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function whipme($a = NULL) { $a--; $a++; var_dump($a); } whipme(); whipme(0);
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(1) int(0)