3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $t = ''; var_dump(-$t, +$t, !$t, ~$t, $t++, $t--, --$t, ++$t);
based on WmOm2
Output for 7.1.0 - 7.2.0
Warning: A non-numeric value encountered in /in/PIdUd on line 4 Warning: A non-numeric value encountered in /in/PIdUd on line 4 int(0) int(0) bool(true) string(0) "" string(0) "" string(1) "1" int(-1) int(0)
Output for 4.3.0 - 7.0.20
int(0) int(0) bool(true) string(0) "" string(0) "" string(1) "1" int(-1) int(0)