如何排序某个键多维数组？ [英] How to sort a multidimensional array by a certain key?

问题描述

这应该是很简单的，但什么是走在这条路上。
我想通过一键进行排序的多维数组，像这样的：

 阵列（
[0] =＆GT;排列
    （
        [IID] =＆GT; 1
        [受邀者] =＆GT; 174
        [NID] =＆GT; 324343
        [欣欣] =＆GT; 2010-05-09 15:15:0​​0
        [位置] =＆GT; 13
        [现状] =＆GT; 1
        [创建] =＆GT; 2010-05-09 15:05:00
        [更新] =＆GT; 2010-05-09 16时24分○○秒
    ）[1] =＆GT;排列
    （
        [IID] =＆GT; 1
        [受邀者] =＆GT; 220
        [NID] =＆GT; 21232
        [欣欣] =＆GT; 2010-05-09 15:15:0​​0
        [位置] =＆GT; 12
        [现状] =＆GT; 0
        [创建] =＆GT; 2010-05-10 18时11分00秒
        [更新] =＆GT; 2010-05-10 18时11分00秒
    ））
 

说我想[状态]排序这一点，我将如何实现这一目标？
在此先感谢！

解决方案

  //定义一个比较函数
功能CMP（$ A，$ B）{
    如果（$ A ['状态'] == $ B ['状态']）{
        返回0;
    }
    返回（$ A ['状态'＆LT; $ B ['状态']）？ -1：1;
}usort（$阵列，CMP）;
 

这是应该做你想要什么，你可以改变比较函数来排序任何你想要的关键。

This should be really simple, but what is the way to go on this. I want to sort an multidimensional array by a key, like this:

Array (
[0] => Array
    (
        [iid] => 1
        [invitee] => 174
        [nid] => 324343
        [showtime] => 2010-05-09 15:15:00
        [location] => 13
        [status] => 1
        [created] => 2010-05-09 15:05:00
        [updated] => 2010-05-09 16:24:00
    )

[1] => Array
    (
        [iid] => 1
        [invitee] => 220
        [nid] => 21232
        [showtime] => 2010-05-09 15:15:00
        [location] => 12
        [status] => 0
        [created] => 2010-05-10 18:11:00
        [updated] => 2010-05-10 18:11:00
    ))

Say i want to sort this by [status], how would I achieve this? Thanks in advance!

解决方案

//define a comparison function
function cmp($a, $b) {
    if ($a['status'] == $b['status']) {
        return 0;
    }
    return ($a['status'] < $b['status']) ? -1 : 1;
}

usort($array, "cmp");

That should do what you want, you can alter the comparison function to sort on whatever key you want.

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