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<?php $a = [ ['rank' => '579', 'id' => '1', 'foo' => 'a'], ['rank' => '251', 'id' => '2', 'foo' => 'b'], ]; $b = [ ['size' => 'S', 'status' => 'A', 'id' => '1', 'foo' => 'c'], ['size' => 'L', 'status' => 'A', 'id' => '2', 'foo' => 'd'], ]; $result = []; foreach (array_merge($a, $b) as $row) { $result[$row['id']] = ($result[$row['id']] ?? []) + $row; } var_export(array_values($result));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 'rank' => '579', 'id' => '1', 'foo' => 'a', 'size' => 'S', 'status' => 'A', ), 1 => array ( 'rank' => '251', 'id' => '2', 'foo' => 'b', 'size' => 'L', 'status' => 'A', ), )

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