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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; }));
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(0) { } array(0) { } array(0) { }

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