<?php $a[] = ["ID" => 101, "CODE" => 1]; $a[] = ["ID" => 105, "CODE" => 2]; $b[] = ["ID" => 105, "Amount" => 200]; $b[] = ["ID" => 101, "Amount" => 100]; $a = array_column($a, null, "ID"); $b = array_column($b, null, "ID"); ksort($a); ksort($b); $res = array_map('array_merge', $a, $b); print_r(array_values($res));
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