3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = ''; $b = ''; $c = ''; $d = ''; var_dump($a, $b, $c, $d); var_dump($a++, ++$b, $c--, --$d); var_dump($a, $b, $c, $d);
based on GF9EI
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(0) "" string(0) "" string(0) "" string(0) "" string(0) "" string(1) "1" string(0) "" int(-1) string(1) "1" string(1) "1" int(-1) int(-1)