Question

我已经查看了有关在Stack Overflow上使用PHP排序多维数组的所有答案，但没有一个直接回答我的问题。

从各种答案中我了解到我应该使用php usort函数或php array_multisort函数，但我不知道如何将这些应用于我非常具体的数组结构：

这是我的变量$array：

Array
(
    [0] => Array
        (
            [field1] => 10
            [field2] => 100
            [field3] => 100
            [subarray] => Array
                (
                    [0] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => 100
                        )

                    [1] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => abcORDERBYTHIS
                        )

                )

        )

    [1] => Array
        (
            [field1] => 10
            [field2] => 100
            [field3] => 100
            [subarray] => Array
                (
                    [0] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => 100
                        )

                    [1] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => ghiORDERBYTHIS
                        )

                )

        )

    [2] => Array
        (
            [field1] => 10
            [field2] => 100
            [field3] => 100
            [subarray] => Array
                (
                    [0] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => 100
                        )

                    [1] => Array
                        (
                            [field1] => 10
                            [field2] => 100
                            [field3] => defORDERBYTHIS
                        )

                )

        )

)

我希望能够通过field3中 last 数组的subarray对此数组进行排序。使用php end函数可以很容易地访问这个元素：

<?php
foreach($array as $array_single){
    foreach(end($array_single['subarray']) as $sub_array){
        echo $sub_array;
    }
}
?>

从现在开始，我一直困扰着如何按字母顺序对这个多维数组进行排序，以便得到以下结果：

$array[0] - 由于field3值为abcORDERBYTHIS
$array[2] - 跳到中间，因为field3值为defORDERBYTHIS
$array[1] - 现在位于底部，因为field3值为ghiORDERBYTHIS

提前致谢！

Answer 1

试试这段代码：

$array = Array();

$arraytemp['field1'] = 10;
$arraytemp['field2'] = 100;
$arraytemp['field3'] = 100;
$arraytemp['subarray'][0]["field1"] = 10;
$arraytemp['subarray'][0]["field2"] = 100;
$arraytemp['subarray'][0]["field3"] = 100;
$arraytemp['subarray'][1]["field1"] = 10;
$arraytemp['subarray'][1]["field2"] = 100;
$arraytemp['subarray'][1]["field3"] = "abcORDERBYTHIS";

$array[] = $arraytemp;

$arraytemp['field1'] = 10;
$arraytemp['field2'] = 100;
$arraytemp['field3'] = 100;
$arraytemp['subarray'][0]["field1"] = 10;
$arraytemp['subarray'][0]["field2"] = 100;
$arraytemp['subarray'][0]["field3"] = 100;
$arraytemp['subarray'][1]["field1"] = 10;
$arraytemp['subarray'][1]["field2"] = 100;
$arraytemp['subarray'][1]["field3"] = "ghiORDERBYTHIS";

$array[] = $arraytemp;

$arraytemp['field1'] = 10;
$arraytemp['field2'] = 100;
$arraytemp['field3'] = 100;
$arraytemp['subarray'][0]["field1"] = 10;
$arraytemp['subarray'][0]["field2"] = 100;
$arraytemp['subarray'][0]["field3"] = 100;
$arraytemp['subarray'][1]["field1"] = 10;
$arraytemp['subarray'][1]["field2"] = 100;
$arraytemp['subarray'][1]["field3"] = "defORDERBYTHIS";

$array[] = $arraytemp;

// Sort the multidimensional array
usort($array, "custom_sort");

// Define the custom sort function used in usort
function custom_sort($a,$b) {
    return strcmp($a['subarray'][1]["field3"], $b['subarray'][1]["field3"]);
}

在PHP中对多维数组进行高级排序

1 个答案: