3v4l.org

run code in 500+ PHP versions simultaneously
<?php $string = null; if (empty($string)) { echo 'empty'; }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
empty
preferences:
94.8 ms | 1230 KiB | 4 Q