php - 对大型多维数组进行排序

Question

我有一个非常大的数组，其中包含以下数据：

Array
(
    [2] => Array
        (
            [Berlin] => Array
                (
                    [1] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [name] => Joe
                                    [car_name] => Audi
                                    [car_color] => Black
                                    [sid] => 130 
                                )
                            [1] => stdClass Object
                                (
                                    [name] => Mark
                                    [car_name] => BMW
                                    [car_color] => Red
                                    [sid] => 135
                                )
                        )
                    [0] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [name] => Lucas
                                    [car_name] => Audi
                                    [car_color] => Yellow
                                    [sid] => 168
                                )
                            [1] => stdClass Object
                                (
                                    [name] => Joe
                                    [car_name] => Volkswagen
                                    [car_color] => Black
                                    [sid] => 170 
                                )
                            [2] => stdClass Object
                                (
                                    [name] => Thomas
                                    [car_name] => Ford
                                    [car_color] => Gray
                                    [sid] => 119
                                )
                        )
                )
            [Moscow] => Array
                (
                    [1] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [name] => Matt
                                    [car_name] => Mustang
                                    [car_color] => Black
                                    [sid] => 230 
                                )
                            [1] => stdClass Object
                                (
                                    [name] => Suze
                                    [car_name] => Lada
                                    [car_color] => Red
                                    [sid] => 245
                                )
                        )
                    [0] => Array
                        (
                            [0] => stdClass Object
                                (
                                    [name] => Lucas
                                    [car_name] => Unknown
                                    [car_color] => Brown
                                    [sid] => 374
                                )
                            [1] => stdClass Object
                                (
                                    [name] => Mathew
                                    [car_name] => Volkswagen
                                    [car_color] => Blue
                                    [sid] => 589 
                                )
                            [2] => stdClass Object
                                (
                                    [name] => Thomas
                                    [car_name] => Ford
                                    [car_color] => Light Blue
                                    [sid] => 741
                                )
                        )
                )
        )
)

现在我想这样排序（请阅读这些//行）：

Array
(
    [2] => Array //from min to max - eg. from 0 to 50
        (
            [Berlin] => Array //alphabetically from A to Z
                (
                    [1] => Array //from min to max eg. from 0 to 1
                        (
                        )
                 )
         )
)

我怎样才能在 PHP 中实现这一点？我希望我足够清楚，请随时在评论中询问更多信息。

Answer 1

会是这样的：

// ksort sorts the keys low to high

ksort($array[2]);

// uksort w/ natsort is a full alphanumeric sorting A-Z0-9
uksort($array[2]['Berlin'], 'natsort');

ksort($array[2]['Berlin'][1]);

关于数组和数组函数的文档：

http://us3.php.net/manual/en/book.array.php

功能示例

这个例子是真正特定于你的例子；但是，如果您的数组结构确实是动态的，则可以创建递归样式函数。

$BigArray = array();

//Sorting the initial array index
ksort($BigArray);

foreach($BigArray as $a)
{
    // Sorting Berlin / Moscow here..
    uksort($a, 'natsort');
    foreach($a as $b)
    {
        // Sorting the index inside the cities
        ksort($b);
    }
}

Answer 2

最紧凑的方法是使用递归函数。这也将允许您在代码中其他位置的不同维度的数组上重用它。

function SortArray($arr) {
    if(!is_array($InnerArray))
        return;
    foreach($arr as $InnerArray) {
        SortArray($InnerArray);
    }
    ksort($arr);
}
SortArray($array);