使用递归将 PHP 多维数组转换为多级菜单？

Question

我正在尝试创建一个 PHP 递归函数来从多维数组创建多级菜单，但仍然失败。

我有这样的数据：

<?php
$json = '{"id":1,"name":"john","member":[{"id":9,"name":"jane","member":[]},{"id":10,"name":"lorem","member":[{"id":12,"name":"ipsum","member":[{"id":99,"name":"dolor","member":[]},{"id":109,"name":"sit","member":[{"id":999,"name":"rose","member":[]}]}]}]}]}';

$raw = json_decode($json, true);
?>

所以现在我有了一个多维数组：

(
    [id] => 1
    [name] => john
    [member] => Array
        (
            [0] => Array
                (
                    [id] => 9
                    [name] => jane
                    [member] => Array
                        (
                        )

                )

            [1] => Array
                (
                    [id] => 10
                    [name] => lorem
                    [member] => Array
                        (
                            [0] => Array
                                (
                                    [id] => 12
                                    [name] => ipsum
                                    [member] => Array
                                        (
                                            [0] => Array
                                                (
                                                    [id] => 99
                                                    [name] => dolor
                                                    [member] => Array
                                                        (
                                                        )

                                                )

                                            [1] => Array
                                                (
                                                    [id] => 109
                                                    [name] => sit
                                                    [member] => Array
                                                        (
                                                            [0] => Array
                                                                (
                                                                    [id] => 999
                                                                    [name] => rose
                                                                    [member] => Array
                                                                        (
                                                                        )

                                                                )

                                                        )

                                                )

                                        )

                                )

                        )

                )

        )

)

我的问题是，如何生成如下最终数据：

<ul>
        <li>john
            <ul>
                <li>jane</li>
                <li>lorem
                    <ul>
                        <li>ipsum
                            <ul>
                                <li>dolor</li>
                                <li>sit
                                    <ul>
                                        <li>rose</li>
                                    </ul>
                                </li>
                            </ul>
                        </li>
                    </ul>
                </li>
            </ul>
        </li>
    </ul>

使用PHP递归函数？

我一直在研究几个例子，但不幸的是给定的解决方案和数据 sample/condition 完全不同。

Answer 1

<?php

$json = '{"id":1,"name":"john","member":[{"id":9,"name":"jane","member":[]},{"id":10,"name":"lorem","member":[{"id":12,"name":"ipsum","member":[{"id":99,"name":"dolor","member":[]},{"id":109,"name":"sit","member":[{"id":999,"name":"rose","member":[]}]}]}]}]}';

$raw = json_decode($json, true);
//var_dump($raw);

function outputSubmenu($items) {
    echo '<ul>';
    foreach ($items as $data) {
        echo '<li>';
        echo $data['name'];
        if (count($data['member'])) {
            outputSubmenu($data['member']);
        }
        echo '</li>';
    }
    echo '</ul>';
}

echo outputSubmenu([$raw]);

https://3v4l.org/Gnvai

请注意，我必须如何将 $raw 变量放入数组中，以便第一个 foreach 起作用。

使用递归将 PHP 多维数组转换为多级菜单？

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