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<?php $array = [ "pentrose_50_rafhan_c_kgs" => 100, "pentrose_50_rafhan_c_issued_kgs" => 300, "pentrose_50_rafhan_c_rskg" => 99.1, "pentrose_50_rafhan_c_amount" => 29730, ]; $newArray[explode('_c_', current(($keys = array_keys($array))))[0]] = array_map(fn($key) => [explode('_c_', $key)[1] => $array[$key]], $keys); var_dump($newArray);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array(1) { ["pentrose_50_rafhan"]=> array(4) { [0]=> array(1) { ["kgs"]=> int(100) } [1]=> array(1) { ["issued_kgs"]=> int(300) } [2]=> array(1) { ["rskg"]=> float(99.1) } [3]=> array(1) { ["amount"]=> int(29730) } } }

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