按键值对关联数组排序

Question

I try to sort my array by "delais_livraison" by DESC in php but i dont know how i can do that

In the first level I expected to have in first Etoile => 25 and then Feuillage => 10

Array
(
    [A] => Array
        (
            [0] => Array
                (
                    [Feuillage] => Array
                        (
                            [delais_livraison] => 10
                        )
                )
            [1] => Array
                (
                    [Étoiles] => Array
                        (
                            [delais_livraison] => 25
                        )
                )
        )
    [B] => Array
        (
            [0] => Array
                (
                    [Grenouillère] => Array
                        (
                            [delais_livraison] => 7
                        )
                )
            [1] => Array
                (
                    [Chaussons] => Array
                        (
                            [delais_livraison] => 0
                        )
                )
        )
)

Edit : this how my array has been build pastebin

Answer 1

Just try with:

$data = array(
    'A' => array(
        array('Feuillage'    => array('delais_livraison' => 10)),
        array('Étoiles'      => array('delais_livraison' => 25)),
    ),
    'B' => array(
        array('Grenouillère' => array('delais_livraison' => 7)),
        array('Chaussons'    => array('delais_livraison' => 0)),
    ),
);

foreach ($data as &$group) {
    usort($group, function($itemA, $itemB){
        $a = current($itemA)['delais_livraison'];
        $b = current($itemB)['delais_livraison'];
        if ($a == $b) return 0;
        return ($a > $b) ? -1 : 1;
    });
}

Output:

array (size=2)
  'A' => 
    array (size=2)
      0 => 
        array (size=1)
          'Étoiles' => 
            array (size=1)
              'delais_livraison' => int 25
      1 => 
        array (size=1)
          'Feuillage' => 
            array (size=1)
              'delais_livraison' => int 10
  'B' => &
    array (size=2)
      0 => 
        array (size=1)
          'Grenouillère' => 
            array (size=1)
              'delais_livraison' => int 7
      1 => 
        array (size=1)
          'Chaussons' => 
            array (size=1)
              'delais_livraison' => int 0

Solution uses anonymous function that has been introduced in PHP 5.3.0 . For older versions just create a function and specify it in usort function:

function my_sort_function($itemA, $itemB){
    // ...
}
usort($group, 'my_sort_function');

Answer 2

Since your array has two levels, how do you want to manage a global sort ? Do you want to do a sort for each sub array ( A, B, ...) ?

In this case the approach will be to use function uksort for each sub array (A and B) and define your own compare function to compare delais_livraison values.

Answer 3

您似乎正在寻找ksort ，或者，如果您必须提供自己的比较函数，则是uksort 。