Question

我需要帮助设计一个递归函数：

递归显示多维数组
必须使用项目符号，例如<ul>和<li>
文字必须链接到文档。例如，文本“1. Hi”将被重定向，保持其目录结构（数组结构）。但是文本必须递归显示。

将成为输入的数组将是目录层次结构的多维数组。输入：

Array
(
    [pocketmine] => Array
        (
            [tutorial] => Array
                (
                    [0] => 1. Introduction.markdown
                    [1] => part3-setting-up-your-workspace.php
                    [2] => part1-introduction.php~
                    [3] => part2-planning.php~
                    [4] => part2-planning.php
                    [5] => part5-pocketmine-says-hello-world.php
                    [6] => part4-inter-lingual-programming-basics.php
                )

            [documentation] => Array
                (
                    [0] => List of Events Alphabetical.markdown
                )

        )

)

第一个的输出将是

Pocketmine
- 教程
  - 1.简介

但是“1.简介”必须链接到“whateverURL / pocketmine / tutorial / 1.Introduction”

我需要将其显示为（例如）

<ul>
<li><a href=pocketmine/tutorial/1.-Introduction.markdown>1. Introduction</li>
</ul>

提前感谢您的帮助。

Answer 1

使用RecursiveArrayIterator处理数据和RecursiveIteratorIterator进行模板设置，您可以按照自己的方式显示数据。这是一个快速实现

<?php

$data = array(
    'pocketmine' => array
    (
        'tutorial' => array
        (
            '1.Introduction.markdown',
            'part3-setting-up-your-workspace.php',
            'part1-introduction.php~',
            'part2-planning.php~',
            'part2-planning.php',
            'part5-pocketmine-says-hello-world.php',
            'part4-inter-lingual-programming-basics.php',
        ),
        'documentation' => array
        (
            'List of Events Alphabetical.markdown'
        ),

    )   
);

class ListIterator extends RecursiveIteratorIterator
{
    protected $url_path;
    protected $top_path;

    public function beginChildren()
    {
        echo '<ul>';
    }

    public function endChildren()
    {
        //Reset url path when changing children.
        $this->url_path = "";

        echo '</ul></li>';
    }

    public function current()
    {
        // if current item has children then print only the key.
        if ($this->callHasChildren()) {
            // Store top path for urls
            if ($this->getDepth() == 0) {
                $this->top_path = $this->key();
            } else {
                // create the url path from array keys.
                $this->url_path .= "/" . $this->key();
            }
            return $this->key();
        } else {
            // Get only the title without dot extension.
            $dot = strrpos(parent::current(), '.');
            if ($dot !== false) {
                $page = substr(parent::current(), 0, $dot);
            } else {
                $page = parent::current();
            }
            // compose final url path
            $path = $this->top_path . $this->url_path . "/" . parent::current();

            return '<a href="'.$path.'">'. $page . '</a>';
        }
    }

    public function beginIteration()
    {
        echo '<ul>';
    }

    public function endIteration()
    {
        echo '</ul>';
    }
}

$iterator = new RecursiveArrayIterator($data);

$template = new ListIterator($iterator, RecursiveIteratorIterator::SELF_FIRST);

foreach ($template as $item) {
    echo '<li>' . $item;
    echo $template->callHasChildren() == false ? '</li>' : null;
}

将多维数组显示为项目符号

1 个答案: