3v4l.org

run code in 150+ php & hhvm versions
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<?php $value = null; if (false === $value || (empty($value) && '0' != $value)) { echo 'invalid'; } echo empty($value); echo '0' != $value;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
invalid11