按子值对php多维数组进行排序 [英] Sort php multidimensional array by sub-value

问题描述

我有这个数组

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
            )


    )

现在我想按 [mid] 对这个数组进行排序我该怎么做?

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

目前我在 foreach 循环中对此进行排序
必须有更好的方法

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

编辑我希望输出类似

[mid] 键 =>数组值

谢谢

推荐答案

您可以使用 usort 函数.

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

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