php - array_merge 更改键

Question

我得到了以下数组:

$arr = array(6 => 'Somedata', 7 => 'Somedata1', 8 => 'Somedata2');

问题是，当我使用 array_merge( (array) "Select the data", $arr); 时，它确实将数组键更改为:

Array
(
    [0] => Not specified
    [1] => Somedata
    [2] => Somedata1
    [3] => Somedata2
)

是否可以跳过 array_merge 键预版本，使输出看起来像这样？

Array
(
    [0] => Not specified
    [6] => Somedata
    [7] => Somedata1
    [8] => Somedata2
)

Answer 1

使用 + operator创建 2 个数组的联合:

$arr = array(6 => 'Somedata', 7 => 'Somedata1', 8 => 'Somedata2');

$result = (array)'Select the data' + $arr;

var_dump($result);

结果:

array(4) {
  [0]=>
  string(15) "Select the data"
  [6]=>
  string(8) "Somedata"
  [7]=>
  string(9) "Somedata1"
  [8]=>
  string(9) "Somedata2"
}