如何基于另一个数组值而不是键对数组进行排序？

Question

我有这两个数组，我需要按ID订购第二个数组，就像第一个数组一样

如何根据第一个值重新订购第二个？我尝试了这个想法，但只适用于简单数组：https://develike.com/en/articles/sorting-an-array-by-values-based-on-another-array-in-php

有序ID数组：

Array
(
    [0] => 16351
    [1] => 18468
    [2] => 17160
    [3] => 1851
    [4] => 10734
    [5] => 18623
    [6] => 17813
    [7] => 14341
)

无序数组：

Array
(
    [0] => WP_Post Object
        (
            [ID] => 18623
            [post_author] => 57
         )
    [1] => WP_Post Object
        (
            [ID] => 18468
            [post_author] => 57
        )
      etc...

Answer 1

您可以从循环键数组开始，它最终将包含有序值。

在keys数组循环中，为无序内容启动一个循环，对照无序键检查有序键，如果它们相同，则将有序数组值设置为无序值。

像这样的。

// $ordered_arr is the keys array
// $unordered_arr is the objects arrau

foreach ($ordered_arr as &$ordered_key) {
    foreach ($unordered_arr as $unordered_value) {
        // check if both unordered object id is equal to ordered key
        if ($unordered_value->ID == $ordered_key) {
            // set the object as value, we can do it this way because
            // $ordered_key is by referance
            $ordered_key = $unordered_value;
            break;
        }
    }
}

Answer 2

$arr = [ 16351, 18468, 17160, 1851, 10734, 18623, 17813, 14341 ];

class WP_Post {
  public $ID;
  public $post_author = 0;
  public function __construct($ID, $post_author = 0) {
    $this->ID = $ID;
    $this->post_author = $post_author;
  }
}

$arr2 = [
  new WP_Post(18623, 1),
  new WP_Post(18468, 2),
  new WP_Post(1851, 3),
  new WP_Post(14341, 4),
  new WP_Post(16351, 5),
  new WP_Post(17813, 6)
];

$result = array_filter(
  array_map(static fn($value) => array_values(
    array_filter($arr2, static fn($value2) => $value2->ID === $value)
  ), $arr)
);