PHP数组合并问题？

Question

如何将如下数组

array(2) {
  [0]=>
  array(2) {
    [0]=>
    string(20) "18052910110100956524"
    [1]=>
    string(12) "102101016056"
  }
  [1]=>
  array(1) {
    [0]=>
    string(12) "101101502347"
  }
}

合并成

array(2) {
    [0]=>
    string(20) "18052910110100956524"
    [1]=>
    string(12) "102101016056"
    [2]=>
    string(12) "101101502347"
}

Answer 1

$arr = [
  ["18052910110100956524", "102101016056"],
  ["101101502347"]
];

$result = array_merge(...$arr);

var_dump($result);