比较两个多维键值并合并非重复项

Question

我有两个多维数组。我正在遍历两个数组，检查某些值并创建一个新数组。

$full_cats array

Array
(
[0] => Array
    (
        [parent_cats] => Array
            (
                [id] => 384
                [name] => Beers & Ales
                [parent] => 0
            )

    )

[1] => Array
    (
        [parent_cats] => Array
            (
                [id] => 387
                [name] => Wines
                [parent] => 0
            )

    )

)


$sub_cats array

Array
(
[0] => Array
    (
        [sub_cats] => Array
            (
                [id] => 386
                [name] => Ales
                [parent] => 384
            )

    )

[1] => Array
    (
        [sub_cats] => Array
            (
                [id] => 385
                [name] => Beers
                [parent] => 384
            )

    )

[2] => Array
    (
        [sub_cats] => Array
            (
                [id] => 403
                [name] => Red
                [parent] => 387
            )

    )

)

我正在遍历两个数组以检查 $sub_cat['sub_cats']['parent'] 值是否与 $full_cat['parent_cats']['id'] 值。如果为真，则两个值都添加到 $master_cats 数组。

$master_cats = array();
foreach ($sub_cats as $sub_cat) {
    foreach ($full_cats as $full_cat) {
        if( $sub_cat['sub_cats']['parent'] == $full_cat['parent_cats']['id'] ){

            $master_cats[] = array(
                "parent_cats" => array(
                    $full_cat['parent_cats'],
                ),
                "sub_cats" => array(
                    $sub_cat['sub_cats'],
                )
            );

        };
    };
};

$master_cats输出-

Array
(
[0] => Array
    (
        [parent_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 384
                        [name] => Beers & Ales
                        [parent] => 0
                    )

            )

        [sub_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 386
                        [name] => Ales
                        [parent] => 384
                    )

            )

    )

[1] => Array
    (
        [parent_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 384
                        [name] => Beers & Ales
                        [parent] => 0
                    )

            )

        [sub_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 385
                        [name] => Beers
                        [parent] => 384
                    )

            )

    )

[2] => Array
    (
        [parent_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 387
                        [name] => Wines
                        [parent] => 0
                    )

            )

        [sub_cats] => Array
            (
                [0] => Array
                    (
                        [id] => 403
                        [name] => Red
                        [parent] => 387
                    )

            )

    )

)

$master_cats 数组有两个问题。

第一个问题 - 如您所见，索引 0 和 1 具有相同的 [parent_cats] 值。如果 [parent_cats] key/values 不存在，我只想添加它们。

第二个问题 - $master_cats 数组索引 0 和 1，sub_cats 数组，一些值不同但都具有相同的 [sub_cats][parent] => 384 所以它们属于同一个数组索引，例如 0.

下面是我希望使用上面 foreach/loop 中的 $master_cats 数组实现的

    Array
(
    [0] => Array
        (
            [parent_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 384 <-- Parent ID
                            [name] => Beers &amp; Ales
                            [parent] => 0
                        )

                )

            [sub_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 386
                            [name] => Ales
                            [parent] => 384 <-- belongs to [parent_cats][id]
                        )
                    [1] => array 
                        (
                            [id] => 385
                            [name] => Beers
                            [parent] => 384 <-- belongs to [parent_cats][id]
                        )
                )

        )
    [1] => Array
        (
            [parent_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 387 <-- Parent ID
                            [name] => Wines
                            [parent] => 0
                        )

                )

            [sub_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 403
                            [name] => Red
                            [parent] => 387 <-- belongs to [parent_cats][id]
                        )

                )

        )

)

Answer 1

这是一种解决方法。注意：你的数组结构有点过度嵌套......但这是给定结构的解决方案

$all = [];
$tmpsubs = [];
foreach ($full_cats as $parent) {
    $tmp = ['parent_cats' => $parent['parent_cats'], 'sub_cats' => []];
    foreach ($sub_cats as $sub) {
        if ($sub['sub_cats']['parent'] == $parent['parent_cats']['id']) {
            $tmp['sub_cats'][]=$sub['sub_cats'];
        }
    }
    $all[] = $tmp;
}
print_r($all);

示例：https://3v4l.org/01oLF

输出：

Array
(
    [0] => Array
        (
            [parent_cats] => Array
                (
                    [id] => 384
                    [name] => Beers & Ales
                    [parent] => 0
                )

            [sub_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 386
                            [name] => Ales
                            [parent] => 384
                        )

                    [1] => Array
                        (
                            [id] => 385
                            [name] => Beers
                            [parent] => 384
                        )

                )

        )

    [1] => Array
        (
            [parent_cats] => Array
                (
                    [id] => 387
                    [name] => Wines
                    [parent] => 0
                )

            [sub_cats] => Array
                (
                    [0] => Array
                        (
                            [id] => 403
                            [name] => Red
                            [parent] => 387
                        )

                )

        )

)

注意：这是一个简化数组结构的示例（这需要更改我的答案中的代码，但最终可能会让您的生活更轻松）

  $parent_cats= array( 
    array(
            "id" => "384",
            "name" => "Beers & Ales",
            "parent" => "0"
        ),
    array(
            "id" => "387",
            "name" => "Wines",
            "parent" => "0"
        ));