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<?php $arrays = [ [ "a1" => true, "b1" => "abc", "c1" => "def" ], [ "a2" => true, "b2" => "fgh", "c2" => "ijk", "d2" => "lmn", "e2" => "opq" ] ]; $result = array_reduce($arrays, function ($carry, $item) { $carry += $item; return $carry; }, []); var_dump($result);
Output for 5.6.38, 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.27, 8.0.0 - 8.0.15, 8.1.0 - 8.1.2
array(8) { ["a1"]=> bool(true) ["b1"]=> string(3) "abc" ["c1"]=> string(3) "def" ["a2"]=> bool(true) ["b2"]=> string(3) "fgh" ["c2"]=> string(3) "ijk" ["d2"]=> string(3) "lmn" ["e2"]=> string(3) "opq" }

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