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排序PHP多维数组由子值

分类: 技术问答 • 2022-07-20 20:41:39
问题描述：

我有这样的阵列

Array
(
[data] => Array
    (
        [0] => Array
            (

                [id] => 1293005125
                [viewed] => TRUE
                [active] => TRUE
                [time] => December 22, 2010 13:00 hours
                [timestamp] => 1293006034
                [initial_timestamp] => 1293005125
                [user] => administrator
            )

        [1] => Array
            (

                [mid] => 1293001908
                [viewed] => TRUE
                [active] => TRUE
                [time] => December 22, 2010 13:00 hours
                [timestamp] => 1293001908
                [initial_timestamp] => 1293001908
                [user] => administrator
            )

        [2] => Array
            (

                [mid] => 1293009999
                [viewed] => TRUE
                [active] => TRUE
                [time] => December 22, 2010 13:00 hours
                [timestamp] => 1293009999
                [initial_timestamp] => 1293009999
                [user] => administrator
            )

        [3] => Array
            (

                [mid] => 1293006666
                [viewed] => TRUE
                [active] => TRUE
                [time] => December 22, 2010 13:00 hours
                [timestamp] => 1293006666
                [initial_timestamp] => 1293006666
                [user] => administrator
            )

        [4] => Array
            (

                [mid] => 1293005125
                [viewed] => TRUE
                [active] => TRUE
                [time] => December 22, 2010 13:00 hours
                [timestamp] => 1293006125
                [initial_timestamp] => 1293005125
                [user] => administrator2
            )


    )

现在我想排序这个数组[MID]
我该怎么做呢？

Now I would like to sort this array by [mid] How do I do this?

目前我在foreach循环结果进行排序本
必须有一个更好的办法

Currently I sort this in a foreach loop
There has to be a better way

修改
我希望输出像

EDIT I hoped to output something like

[MID]键=＆GT;数组值

感谢

答

您可以使用 usort 功能。

function cmp($a, $b) {
        return $a["mid"] - $b["mid"];
}
usort($arr, "cmp");

查看它

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