3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test($var) { //$var = 3; debug_zval_dump($var); } $a = 0; debug_zval_dump($a); test($a); debug_zval_dump($a);
Output for 7.0.0 - 7.1.0
int(0) int(0) int(0)
Output for 4.3.0 - 5.6.28
long(0) refcount(2) long(0) refcount(4) long(0) refcount(2)