3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "0"; var_dump($a != NULL); // "0" != "" var_dump((bool)$a == NULL);// false == false var_dump((bool)$a); // false var_dump($a != NULL && (bool) $a == NULL); var_dump($a == false);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) bool(true) bool(false) bool(true) bool(true)