Online PHP editor | refs for KAR6k

<?php $arr1 = ["101","206", "206"]; $arr2 = ["PA701", "PA700", "PA700"]; $arr3 = ["2022-04-01", "2022-04-07", "2022-04-07"]; $arr4 = [70, 1040, 1625]; foreach ($arr1 as $i => $value) { $compositeKey = "{$value}_{$arr2[$i]}_{$arr3[$i]}"; if (!isset($res1[$compositeKey])) { $res1[$compositeKey] = $value; $res2[$compositeKey] = $arr2[$i]; $res3[$compositeKey] = $arr3[$i]; $res4[$compositeKey] = $arr4[$i]; } else { $res4[$compositeKey] += $arr4[$i]; } } var_export(array_values($res1)); var_export(array_values($res2)); var_export(array_values($res3)); var_export(array_values($res4));