如果值存在于另一个数组中，则替换数组值

Question

如果$b中存在月份号，请尝试替换$a的值。

顺便说一下$ a是数据库结果。

这是我的$b array

Array
(
    [1] => Array
        (
            [current] => Array
                (
                    [year] => 2019
                    [month] => 1
                )

            [past] => Array
                (
                    [year] => 2018
                    [month] => 1
                )

        )

    [2] => Array
        (
            [current] => Array
                (
                    [year] => 2019
                    [month] => 2
                )

            [past] => Array
                (
                    [year] => 2018
                    [month] => 2
                )

        )

)

这是我的$a array

Array
(
    [0] => Array
        (
            [year] => 2018
            [month] => 1
            [total_ca] => 1200.000000
        )

    [1] => Array
        (
            [year] => 2019
            [month] => 6
            [total_ca] => 6000.000000
        )

)

所以我该如何替换我的$b month and year values。通过使用$a month and year values

谢谢