3v4l.org

run code in 300+ PHP versions simultaneously
<?php $company = '1'; $fn = ''; $ln = ''; if (empty($company) && (empty($fn) && empty($ln))) { echo 'error'; } else { echo 'good'; }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
good

preferences:
146.52 ms | 403 KiB | 212 Q