PHP高级多维数组排序

我递归读取一个文件夹，得到一个多维数组，如下所示：

Array
(
   [folder1] => Array
       (
           [sub-folder1] => Array
               (
                   [0] => sub-folder-1-file1.xx
                   [1] => sub-folder-1-file2.xx
                   [2] => sub-folder-1-file3.xx
               )

            [0] => folder-1-file1.xx
            [1] => folder-1-file2.xx
            [2] => folder-1-file3.xx
            [3] => folder-1-file4.xx
            [sub-folder2] => Array
                (
                   [0] => sub-folder-2-file1.xx
                   [1] => sub-folder-2-file1.xx
                )
  ...

ksort($test['folder1'], SORT_STRING); //SORT_STRING compares items as strings

我想把它分类

(
   [folder1] => Array
       (
            [0] => folder-1-file1.xx
            [1] => folder-1-file2.xx
            [2] => folder-1-file3.xx
            [3] => folder-1-file4.xx
            [sub-folder1] => Array
               (
                   [0] => sub-folder-1-file1.xx
                   [1] => sub-folder-1-file2.xx
                   [2] => sub-folder-1-file3.xx
               )
            [sub-folder2] => Array
                (
                   [0] => sub-folder-2-file1.xx
                   [1] => sub-folder-2-file1.xx
                )

就像我们按类型而不是简单按名称列出一样

我想我必须使用usort，但我无法正确理解： 以下是我的作品：

usort($array, function($a, $b){
    if ( (is_array($a) && is_array($b)) || (!is_array($a) && !is_array($b)) )
       return 0;
    if ( is_array($a) )
       return -1;
    return 1;
});

任何帮助都将不胜感激。谢谢

我是这样解决的：

 foreach ($array as $key => $value)
 {
    ksort($array[$key], SORT_STRING);
 }

---

您可以使用

ksort（）

函数并将所需的排序类型作为第二个参数传递

假设阵列的名称为

$test

，则需要如下内容：

Array
(
   [folder1] => Array
       (
           [sub-folder1] => Array
               (
                   [0] => sub-folder-1-file1.xx
                   [1] => sub-folder-1-file2.xx
                   [2] => sub-folder-1-file3.xx
               )

            [0] => folder-1-file1.xx
            [1] => folder-1-file2.xx
            [2] => folder-1-file3.xx
            [3] => folder-1-file4.xx
            [sub-folder2] => Array
                (
                   [0] => sub-folder-2-file1.xx
                   [1] => sub-folder-2-file1.xx
                )
  ...

ksort($test['folder1'], SORT_STRING); //SORT_STRING compares items as strings

如果你做了一个

echo '<pre>',print_r($test,1),'</pre>';

echo''，打印（$test，1），''；

您将能够看到所需的结果。

请改用ksort（）。