在PHP中排序多维关联数组

Question

我有一个PHP数组，看起来像这样:

array (size=1)
  'Marriot' => 
    array (size=7)
      0 => string 'doc5.txt' (length=8)
      1 => string 'test.txt' (length=8)
      2 => string 'test1.txt' (length=9)
      3 => string 'test2.txt' (length=9)
      4 => string 'test3.txt' (length=9)
      5 => 
        array (size=1)
          'Special Docs' => 
            array (size=2)
              0 => string 'doc4.txt' (length=8)
              1 => string 'doc3.txt' (length=8)
      6 => 
        array (size=1)
          'ADocs' => 
            array (size=0)
              empty

如你所见，它保存了非关联文件，然后是两个文件夹，"Special Docs"one_answers"adoc"。我的问题是双重的:

首先，我想将这两个文件夹移动到数组的顶部，以便它们在我的视图中突出。其次，我想按字母顺序对文件夹进行排序(例如，把"ADocs"放在"Special Docs"前面)。我已经尝试过array_multisort没有成功，我有点困在这里。有人知道我该怎么做吗?

谢谢你的帮助。

Answer 1

输入示例

$dir = array(
    0 => 'doc5.txt',
    1 => 'test.txt',
    2 => 'test1.txt',
    3 => 'test2.txt',
    4 => 'test3.txt',
    5 => array(
        'Special Docs' => array (
              0 => 'doc4.txt',
              1 => 'doc3.txt'
          )
    ),
    6 => array( 
        'ADocs' => array()
    )
);

一级排序

function cmp ($a,$b) {
    if (is_array($a)){
        if (is_array ($b)) {
            return strnatcasecmp (key($a), key($b));
        } else {
            return -1;
        }
    } else {
        if (is_array ($b)) {
            return 1;
        } else {
            return strnatcasecmp ($a, $b);
        }
    }
}

示例输出

Array
(
    [0] => Array
        (
            [ADocs] => Array
                (
                )
        )
    [1] => Array
        (
            [Special Docs] => Array
                (
                    [0] => doc4.txt
                    [1] => doc3.txt
                )
        )
    [2] => doc5.txt
    [3] => test.txt
    [4] => test1.txt
    [5] => test2.txt
    [6] => test3.txt
)

多级排序(无限制)

function cmp (&$a,&$b) {
    if (is_array($a)){
        usort($a[key($a)], 'cmp');
        if (is_array ($b)) {
            return strnatcasecmp (key($a), key($b));
        } else {
            return -1;
        }
    } else {
        if (is_array ($b)) {
            return 1;
        } else {
            return strnatcasecmp ($a, $b);
        }
    }
}
usort ($dir, 'cmp');

示例输出

Array
(
    [0] => Array
        (
            [ADocs] => Array
                (
                )
        )
    [1] => Array
        (
            [Special Docs] => Array
                (
                    [0] => doc3.txt
                    [1] => doc4.txt
                )
        )
    [2] => doc5.txt
    [3] => test.txt
    [4] => test1.txt
    [5] => test2.txt
    [6] => test3.txt
)