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<?php $a = ['a' => null]; $b = ['a' => false]; var_dump(array_diff($a, $b)); var_dump(array_diff_assoc($a, $b)); var_dump(array_udiff_assoc($a, $b, function ($a, $b) { return $a === $b; }));

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42.47 ms | 1355 KiB | 5 Q