Php 将多维数组从（Y-m）更新为（Y）

我想知道是否有任何方法可以更改或更新此多维数组

Array ( 
       [AZ] => Array ( [1] => 2020-01 [2] => 2020-02 ) 
       [BY] => Array ( [0] => 2020-03 [1] => 2020-04 ) 
       [CX] => Array ( [1] => 2020-05 [2] => 2020-06 [3] => 2020-07 ) 
       [DW] => Array ( [106] => 2019-01 [107] => 2019-02 [108] => 2019-03)
      ) 

对此

Array ( 
       [AZ] => Array ( [1] => 2020 [2] => 2020 ) 
       [BY] => Array ( [0] => 2020 [1] => 2020 ) 
       [CX] => Array ( [1] => 2020 [2] => 2020 [3] => 2020 ) 
       [DW] => Array ( [106] => 2019 [107] => 2019 [108] => 2019)
      ) 

我不知道这是否可行，但我希望有人能帮助我

您可以使用遍历数组中的所有值，使用以下方法将与

YYYY-MM

格式匹配的值更改为

YYYY

：

注意：我们使用

&$v

作为回调的参数，以便更改数组中的值

输出：

Array
(
    [AZ] => Array
        (
            [1] => 2020
            [2] => 2020
        )
    [BY] => Array
        (
            [0] => 2020
            [1] => 2020
        )
    [CX] => Array
        (
            [1] => 2020
            [2] => 2020
            [3] => 2020
        )
    [DW] => Array
        (
            [106] => 2019
            [107] => 2019
            [108] => 2019
        )
)

---

你有没有试过什么？你能至少把

“2020-01”

改成

“2020”

吗？我想可以用

Array
(
    [AZ] => Array
        (
            [1] => 2020
            [2] => 2020
        )
    [BY] => Array
        (
            [0] => 2020
            [1] => 2020
        )
    [CX] => Array
        (
            [1] => 2020
            [2] => 2020
            [3] => 2020
        )
    [DW] => Array
        (
            [106] => 2019
            [107] => 2019
            [108] => 2019
        )
)