3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo['bar'] = false; if(!empty($foo['bar'])) { echo 'A'; } else { echo 'B'; }
Output for 7.1.25 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.30, 8.0.0 - 8.0.22, 8.1.0 - 8.1.9
B

preferences:
47.29 ms | 409 KiB | 5 Q