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<?php $arr1 = [1, 4, 5, 7]; $arr2 = [2, 3, 4, 6]; $arrint = array_uintersect($arr1, $arr2, function ($a, $b) { return ($a === $b) ? 0 : (($a > $b) ? 1 : -1); }); var_dump($arrint);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 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
array(1) { [1]=> int(4) }

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