3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 123 => true]; var_dump($array[123] ?? null);
Output for 7.0.19, 7.3.24 - 7.3.33, 7.4.12 - 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
bool(true)

preferences:
99.75 ms | 402 KiB | 115 Q