php | Array merge

Question

I have an array:

Array
(
    [0] => Array
        (
            [qty] => 2
            [id] => 1
            [name] => Name 1
            [sku] =>         


        

Answer 1

$result = array();
foreach ($input as $subarray) {
  $id = $subarray['id'];
  if (isset($result[$id])) { // Same ID
    $result[$id]['qty'] += $subarray['qty']; // Add quantities
  } else {
    $result[$id] = $subarray; // New ID, put in results
  }
}
$result = array_values($result); // Convert from associative array to indexed