3v4l.org

run code in 300+ PHP versions simultaneously
<?php $box = new stdClass(); echo empty($box) ? 'Nothing here...' : 'define "empty"...'; // empty() does not generate a warning if the variable does not exist. // echo empty($space); // 1
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
define "empty"...
preferences:
210.95 ms | 404 KiB | 227 Q