3v4l.org

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<?php $array1 = array(1, 2, 3, 4); $array2 = array(1, 2, 5, 6); $array3 = array(1, 2, 6); // The result should contain ONLY: 1 and 2. 6 is not in all 3 results $result = array(); for ($i = 1; $i <= 3; $i++) { $array = 'array' . $i; if (empty($result)) { $result = ${$array}; } else { $inBoth = array_intersect($result, ${$array}); //$notInBoth = array_diff($result, ${$array}); $result = array_diff($result, array_unique(array_merge($result, $inBoth))); } } var_dump($result);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(6) }
preferences:
217.38 ms | 405 KiB | 329 Q