如何从PHP的HTML列表中提取结构化文本? [英] How can I extract structured text from an HTML list in PHP?

问题描述

我有这个字符串:

<ul>
  <li id="1">Page 1</li>
  <li id="2">Page 2
    <ul>
      <li id="3">Sub Page A</li>
      <li id="4">Sub Page B</li>
      <li id="5">Sub Page C
        <ul>
          <li id="6">Sub Sub Page I</li>
        </ul>
      </li>
    </ul>
  </li>
  <li id="7">Page 3
    <ul>
      <li id="8">Sub Page D</li>
    </ul>
  </li>
  <li id="9">Page 4</li>
</ul>

并且我想用PHP爆炸所有信息，并使之像这样:

and I want to explode every information with PHP and make it like:

----------------------------------
| ID | ORDER | PARENT | CHILDREN |
----------------------------------
|  1 |   1   |   0   |     0     |
|  2 |   2   |   0   |   3,4,5   |
|  3 |   1   |   2   |     0     |
|  4 |   2   |   2   |     0     |
|  5 |   3   |   2   |     6     |
|  6 |   1   |   5   |     0     |
|  7 |   3   |   0   |     8     |
|  8 |   1   |   7   |     0     |
|  9 |   4   |   0   |     0     |
----------------------------------

有关其他信息，此列表对我而言意味着以下含义:

For extra information, this is what this list means for me:

ID 1是第1个(第1页)，有0个父母和0个孩子，

ID 1 is 1st (Page 1) and has 0 parents and 0 children,

ID 2是第二个(第2页)，有0个父母和孩子ID 3、4、5，

ID 2 is 2nd (Page 2) and has 0 parents and children IDs 3,4,5,

ID 3是第1个(子页面A)，并且具有父ID 2和0个孩子，

ID 3 is 1st (Sub Page A) and has parent ID 2 and 0 children,

ID 4是第二个(子页面B)，并且具有父ID 2和0个孩子，

ID 4 is 2nd (Sub Page B) and has parent ID 2 and 0 children,

ID 5是第3个(子页面C)，并且具有父ID 2和子ID 6，

ID 5 is 3rd (Sub Page C) and has parent ID 2 and children ID 6,

ID 6是第1个(子页面I)，其父ID 5和0个孩子，

ID 6 is 1st (Sub Page I) and has parent ID 5 and 0 children,

ID 7是第3页(第3页)，有0个父母和孩子ID 8，

ID 7 is 3th (Page 3) and has 0 parents and children ID 8,

ID 8是第1个(子页面I)，其父ID 7和0个孩子，

ID 8 is 1st (Sub Page I) and has parent ID 7 and 0 children,

ID 9是第4页(第4页)，有0个父母和0个孩子.

ID 9 is 4th (Page 4) and has 0 parents and 0 children.

如果这太难了，谁能建议使用另一种方法从此字符串中获取该信息?

If this is too tough, can anyone sugest how to get that info from this string with another method?

推荐答案

这不是字符串"，而是HTML.您需要使用HTML解析器，例如 DOMDocument 或

That's not "a string", it's HTML. You need to use an HTML parser like DOMDocument or simple_html_dom.

在 http://htmlparsing.com/php.html

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