3v4l.org

run code in 300+ PHP versions simultaneously
<?php $test['aaa'] = null; echo isset($test); echo empty($test);
Output for 8.1.0 - 8.1.30, 8.2.0 - 8.2.24, 8.3.0 - 8.3.12
1

preferences:
40.71 ms | 406 KiB | 5 Q