PHP array_multisort - 如何保持鍵值？

Question

如何深度排序多維數組並保留鍵？

$array = [ 
    '2' => [ 
     'title' => 'Flower', 
     'order' => 3 
    ], 
    '3' => [ 
     'title' => 'Rock', 
     'order' => 1 
    ], 
    '4' => [ 
     'title' => 'Grass', 
     'order' => 2 
    ] 
]; 

foreach ($array as $key => $row) { 
    $items[$key] = $row['order']; 
} 

array_multisort($items, SORT_DESC, $array); 

print_r($array); 

結果：

Array 
(
    [0] => Array 
     (
      [title] => Flower 
      [order] => 3 
     ) 

    [1] => Array 
     (
      [title] => Grass 
      [order] => 2 
     ) 

    [2] => Array 
     (
      [title] => Rock 
      [order] => 1 
     ) 

) 

我什麼後：

Array 
(
    [2] => Array 
     (
      [title] => Flower 
      [order] => 3 
     ) 

    [4] => Array 
     (
      [title] => Grass 
      [order] => 2 
     ) 

    [3] => Array 
     (
      [title] => Rock 
      [order] => 1 
     ) 

) 

任何想法？

Answer 1

可能是這是你在尋找：Online Example

保持數組鍵，與訂單欄進行排序併合並它們試。

$keys = array_keys($array); 
array_multisort(
    array_column($array, 'order'), SORT_DESC, SORT_NUMERIC, $array, $keys 
); 
$array = array_combine($keys, $array); 
echo '<pre>'; 
print_r($array); 

Answer 2

您可以嘗試uasort：

uasort($array, function ($a, $b) { return $b['order'] - $a['order']; }); 

您的代碼：

<?php 

$array = [ 
    '2' => [ 
     'title' => 'Flower', 
     'order' => 3 
    ], 
    '3' => [ 
     'title' => 'Rock', 
     'order' => 1 
    ], 
    '4' => [ 
     'title' => 'Grass', 
     'order' => 2 
    ] 
]; 

uasort($array, function ($a, $b) { return $b['order'] - $a['order']; }); 

print_r($array); 

Demo