php - 将数组分解成多维数组(parent->child->sub-child)

Question

我有一个数组($categories_final)，看起来类似于:

Array
(
    [0] => Accessories/Apron
    [1] => Accessories/Banners
    [2] => Accessories/Belts
    [3] => Brand/Brand1
    [4] => Brand/Brand2
    [5] => Apparel/Men/Belts
    [6] => Apparel/Men/Socks
    [7] => Apparel/Women/Leggings
)

我试图让它看起来像这样，这样我就可以将它作为我商店的类别结构添加到数据库中:

Array
(
    [Accessories] => Array
        (
            [0] => Apron
            [1] => Banners
            [2] => Belts
        )
    [Apparel] => Array
        (
            [0] => Men => Array
                (
                    [0] => Belts
                    [1] => Socks
                )
            [1] => Women => Array
                (
                    [0] => Leggings
                )
        )

        ...etc

这是我到目前为止所得到的，但我无法弄清楚如何在 Men/& Women/下添加 child :

$categories = array();
foreach ($categories_final as $cat) {
    $levels = explode('/', $cat);
    if (isset($categories[$levels[0]])) {
        if (!in_array($levels[1], $categories[$levels[0]])) {
            $categories[$levels[0]][]= $levels[1];
        }
    }
    else {
        $categories[$levels[0]][]= $levels[1];
    }
}
print_r($categories);

再一次，我被困在如何将/Belts、/Socks 和/Leggings 添加到它们各自的父项下。

感谢任何帮助，谢谢!

Answer 1

由于可以有无限数量的分支，您可能应该有一个递归解决方案。我尽了最大努力得到了这段代码:

$arr = ['Accessories/Apron', 'Accessories/Banners', 'Accessories/Belts','Brand/Brand1','Brand/Brand2',
        'Apparel/Men/Belts', 'Apparel/Men/Socks', 'Apparel/Women/Leggings'];

$final = [];
foreach ($arr as $branch) {
    $temp = branchRecursive($branch);
    $final = array_merge_recursive($final, $temp);
}



function branchRecursive($branch) {
    // explode only first
    $newBranch = explode('/', $branch, 2);

    // A leaf, no more branches
    if(count($newBranch) != 2) {

        return $newBranch[0];
    }

    $array [ $newBranch[0] ]= branchRecursive($newBranch[1]);
    return $array;

}

它返回这个:

Array
(
    [Accessories] => Array
        (
            [0] => Apron
            [1] => Banners
            [2] => Belts
        )

    [Brand] => Array
        (
            [0] => Brand1
            [1] => Brand2
        )

    [Apparel] => Array
        (
            [Men] => Array
                (
                    [0] => Belts
                    [1] => Socks
                )

            [Women] => Leggings
        )

)

唯一与您的代码不同的是

[Women] => Leggings

代替

[0] => Leggings

但我想 sleep ，但我的脑袋不工作，所以如果有人能指出要更改的内容，我将不胜感激。我希望这不是什么大问题:)