如何在php数组中更改№10的结果？

$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

$array[9] = "新的结果";

$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
$array[9] = "新的结果";
print_r($array);

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
    [6] => 7
    [7] => 8
    [8] => 9
    [9] => 新的结果
)