3v4l.org

run code in 150+ php & hhvm versions
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<?php $str = '0'; if ($str) { echo "not empty\n"; } if (strlen($str)) { echo "not empty\n"; } if (!empty($str)) { echo "not empty\n"; } if ($str !== '') { echo "not empty\n"; }
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
not empty not empty