如何基于php中的键对关联数组进行排序

Question

I am building a nested menu with custom sorting function. I am stuck in sorting the sub menu items of each menu. How can i sort the sub menu items of About, Services, etc of user defined order? Any help would be greatly appreciated.

Array
(
    [About] => Array
        (
            [0] => Array
                (
                    [0] => About us
                    [1] => about.php
                )
            [5] => Array
                (
                    [0] => Who we are
                    [1] => who-we-are.php
                )

        )

    [Services] => Array
        (
            [5] => Array
                (
                    [0] => Web Design
                    [1] => web-design.php
                )

            [10] => Array
                (
                    [0] => Web development
                    [1] => web-development.php
                )

            [15] => Array
                (
                    [0] => SEO
                    [1] => seo.php
                )

        )
)

Answer 1

We are going to sort each submenu array (eg about us, services) separately. But if we add an outer loop we can sort them at once

foreach ($subMenuArray as $key => $row) 
{
    $innerArray = $row;        // This is the array that holds the menu items 
    $value = $row[0];          // That is the word About us, Who we are
    // Here we build an array that holds the actual values we want to sort.
    $sortingReference[$key] = $value;
}

// Using array_multisort we are sorting our main array 
// referencing to the array we built above
// Sort the subMenuArray with menu items descending
array_multisort($sortingReference, SORT_DESC, $subMenuArray);