PHP 基于子对象值的短数组

Question

我有一个包含简单对象的数组。我的数组如下所示:

[posts] => Array
    (
        [0] => WP_Post Object
            (
                [ID] => 4
                [post_title] => Post #4
                ...
             )
        [1] => WP_Post Object
            (
                [ID] => 100
                [post_title] => Post #100
                ...
             )
        [2] => WP_Post Object
            (
                [ID] => 1
                [post_title] => Post #1
                ...
             )
        [3] => WP_Post Object
            (
                [ID] => 21
                [post_title] => Post #21
                ...
             )
    )

我还有一个数组，其中包含第一个数组帖子 ID，按照我喜欢显示该帖子的顺序排列。可以说数组映射就像这样:

[map] => Array
    (
        [0] => 4
        [1] => 21
        [2] => 100
        [3] => 1
    )

现在是方程式。我可以根据每个对象 ID 属性，使用 Map 数组作为映射来排序包含对象的数组，以获得如下所示的结果:

[posts] => Array
    (
        [0] => WP_Post Object
            (
                [ID] => 4
                [post_title] => Post #4
                ...
             )
        [1] => WP_Post Object
            (
                [ID] => 21
                [post_title] => Post #21
                ...
             )
        [2] => WP_Post Object
            (
                [ID] => 100
                [post_title] => Post #100
                ...
             )
        [3] => WP_Post Object
            (
                [ID] => 1
                [post_title] => Post #1
                ...
             )
    )

Answer 1

PHP 有一个内置的方法可以做到这一点，使用 array_multisort功能:

$col = array();
foreach ($posts as $post) {
    $col[] = array_search($post->ID, $map);
}

array_multisort($col, $posts);

// now $posts is sorted in the order specified in $map

在这里试试:http://codepad.org/5rqncj3B