3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(isset($some->variable->that["doesn't"]->exist)); var_dump($some->variable->that["doesn't"]->exist ?? 'default value');
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
bool(false) string(13) "default value"
preferences:
116.64 ms | 1476 KiB | 4 Q