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run code in 300+ PHP versions simultaneously
<?php class A { public int|null $x = 1; } $a = [['x' => null], ['x' => new A()]]; foreach ($a as $b) { var_dump($b['x']?->y ?? 0); }
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
int(0) int(0)

preferences:
52.22 ms | 478 KiB | 5 Q