3v4l.org

run code in 500+ PHP versions simultaneously
<?php $a = null; $b = 2; $c = $a ?? $b = 3; echo "$a $b $c"; // 3 3
Output for 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
3 3
preferences:
44.01 ms | 861 KiB | 4 Q