按值排序多维数组 [英] Sort Multi-dimensional Array by Value

问题描述

  

可能重复：结果
  我如何排序在PHP <多维数组/ p>

我怎么可以排序这个数组由序键的值？即使值是目前的顺序，它们将不会总是

 阵列
（
    [0] =＆GT;排列
        （
            [主题标签] =＆GT; a7e87329b5eab8578f4f1098a152d6f4
            [标题] =＆GT;花
            [为了] =＆GT; 3
        ）    [1] =＆GT;排列
        （
            [主题标签] =＆GT; b24ce0cd392a5b0b8dedc66c25213594
            [标题] =＆GT;自由
            [为了] =＆GT; 2
        ）    [2] =＆GT;排列
        （
            [主题标签] =＆GT; e7d31fc0602fb2ede144d18cdffd816b
            [标题] =＆GT;准备
            [为了] =＆GT; 1
        ）
）
 

解决方案

尝试 usort ：如果你仍然在PHP 5.2或更早版本，你就必须定义排序功能第一：

 函数sortByOrder（$ A，$ B）{
    返回$ a ['订单']  -  $ B ['秩序'];
}usort（$ myArray的，'sortByOrder'）;
 

在PHP 5.3开始，您可以使用匿名函数：

  usort（$ myArray的，功能（$ A，$ B）{
    返回$ a ['订单']  -  $ B ['秩序'];
}）;
 

和最后用PHP 7，您可以使用飞船运营商：

  usort（$ myArray的，功能（$ A，$ B）{
    返回$ a ['订单'＆LT; = GT; $ B ['秩序'];
}）;
 

Possible Duplicate:
How do I Sort a Multidimensional Array in PHP

How can I sort this array by the value of the "order" key? Even though the values are currently sequential, they will not always be.

Array
(
    [0] => Array
        (
            [hashtag] => a7e87329b5eab8578f4f1098a152d6f4
            [title] => Flower
            [order] => 3
        )

    [1] => Array
        (
            [hashtag] => b24ce0cd392a5b0b8dedc66c25213594
            [title] => Free
            [order] => 2
        )

    [2] => Array
        (
            [hashtag] => e7d31fc0602fb2ede144d18cdffd816b
            [title] => Ready
            [order] => 1
        )
)

解决方案

Try a usort: If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the "spaceship operator":

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

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