基于分隔符切片HTML

Question

基于分隔符切片HTML

use*_*500 14 html php parsing dom dom-manipulation

我正在将Word文档转换为HTML并需要根据分隔符解析所述HTML.例如:

<div id="div1">
    <p>
        <font>
            <b>[[delimiter]]Start of content section 1.</b>
        </font>
    </p>
    <p>
        <span>More content in section 1</span>
    </p>
</div>
<div id="div2">
    <p>
        <b>
            <font>[[delimiter]]Start of section 2</font>
        </b>
    <p>
    <span>More content in section 2</span>
    <p><font>[[delimiter]]Start of section 3</font></p>
<div>
<div id="div3">
    <span><font>More content in section 3</font></span>
</div>
<!-- This continues on... -->

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应解析为:

第1节:

<div id="div1">
    <p>
        <font>
            <b>[[delimiter]]Start of content section 1.</b>
        </font>
    </p>
    <p>
        <span>More content in section 1</span>
    </p>
</div>

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第2节:

<div id="div2">
    <p>
        <b>
            <font>[[delimiter]]Start of section 2</font>
        </b>
    <p>
    <span>More content in section 2</span>
    <p></p>
<div>

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第3节:

<div id="div2">
    <p>
        <b>

        </b>
    <p>
    <p><font>[[delimiter]]Start of section 3</font></p>
<div>
<div id="div3">
    <span><font>More content in section 3</font></span>
</div>

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我不能简单地根据分隔符"爆炸"/切片,因为这会破坏HTML.每一段文本内容都有许多父元素.
我无法控制HTML结构,有时会根据Word文档的结构进行更改.最终用户将导入他们的Word文档以在应用程序中进行解析,因此生成的HTML在解析之前不会被更改.
内容通常在HTML中的深度不同.
我不能依赖元素类或ID,因为它们从doc到doc不一致.#div1,#div2和#div3仅用于我的示例中.
我的目标是解析内容,所以如果剩下的空元素没问题,我可以简单地再次运行标记并删除空标记(p,font,b等).

我的尝试:

我正在使用PHP DOM扩展来解析HTML并循环遍历节点.但我无法想出一个很好的算法来解决这个问题.

$doc = new \DOMDocument();
$doc->loadHTML($html);
$body = $doc->getElementsByTagName('body')->item(0);

foreach ($body->childNodes as $child) {
    if ($child->hasChildNodes()) {
        // Do recursive call...
    } else {
        // Contains slide identifier?
    }
}

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Answer 1

Hug*_*ing 7

为了解决这样的问题,您首先需要在开始编码之前确定获得解决方案所需的步骤.

找到以[[delimiter]]开头的元素
检查它的父母是否有 next sibling
没有？重复2
是？下一个兄弟包含内容.

现在,一旦你开始使用它,你已经准备好了90%.您需要做的就是清理不必要的标签,然后就完成了.

为了获得可以扩展的东西,不要构建一个可以工作的混淆代码的市长堆,而是将您需要的所有数据拆分成可以使用的东西.

下面的代码可以使用两个完全符合您需求的类,并在您需要时为您提供一个很好的方法来遍历所有元素.它确实使用PHP Simple HTML DOM Parser而不是DOMDocument,因为我更喜欢它.

<?php
error_reporting(E_ALL);
require_once("simple_html_dom.php");

$html = <<<XML
<body>
        <div id="div1">
                <p>
                        <font>
                                <b>[[delimiter]]Start of content section 1.</b>
                        </font>
                </p>
                <p>
                        <span>More content in section 1</span>
                </p>
        </div>
        <div id="div2">
                <p>
                        <b>
                                <font>[[delimiter]]Start of section 2</font>
                        </b>
                </p>
                <span>More content in section 2</span>
                <p>
                        <font>[[delimiter]]Start of section 3</font>
                </p>
        </div>
        <div id="div3">
                <span>
                        <font>More content in section 3</font>
                </span>
        </div>
</body>
XML;



/*
 * CALL
 */

$parser = new HtmlParser($html, '[[delimiter]]');

//dump found
//decode/encode to only show public values
print_r(json_decode(json_encode($parser)));


/*
 * ACTUAL CODE
 */


class HtmlParser
{
    private $_html;
    private $_delimiter;
    private $_dom;

    public $Elements = array();

    final public function __construct($html, $delimiter)
    {
        $this->_html = $html;
        $this->_delimiter = $delimiter;
        $this->_dom = str_get_html($this->_html);

        $this->getElements();
    }

    final private function getElements()
    {
        //this will find all elements, including parent elements
        //it will also select the actual text as an element, without surrounding tags
        $elements = $this->_dom->find("[contains(text(),'".$this->_delimiter."')]");

        //find the actual elements that start with the delimiter
        foreach($elements as $element) {
            //we want the element without tags, so we search for outertext
            if (strpos($element->outertext, $this->_delimiter)===0) {
                $this->Elements[] = new DelimiterTag($element);
            }
        }

    }

}

class DelimiterTag
{
    private $_element;

    public $Content;
    public $MoreContent;

    final public function __construct($element)
    {
        $this->_element = $element;
        $this->Content = $element->outertext;


        $this->findMore();
    }

    final private function findMore()
    {
        //we need to traverse up until we find a parent that has a next sibling
        //we need to keep track of the child, to cleanup the last parent
        $child = $this->_element;
        $parent = $child->parent();
        $next = null;
        while($parent) {
            $next = $parent->next_sibling();

            if ($next) {
                break;
            }
            $child = $parent;
            $parent = $child->parent();
        }

        if (!$next) {
            //no more content
            return;
        }

        //create empty element, to build the new data
        //go up one more element and clean the innertext
        $more = $parent->parent();
        $more->innertext = "";

        //add the parent, because this is where the actual content lies
        //but we only want to add the child to the parent, in case there are more delimiters
        $parent->innertext = $child->outertext;
        $more->innertext .= $parent->outertext;

        //add the next sibling, because this is where more content lies
        $more->innertext .= $next->outertext;

        //set the variables
        if ($more->tag=="body") {
            //Your section 3 works slightly different as it doesn't show the parent tag, where the first two do.
            //That's why i show the innertext for the root tag and the outer text for others.
            $this->MoreContent = $more->innertext;
        } else {
            $this->MoreContent = $more->outertext;
        }

    }
}




?>

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清理输出:

stdClass Object
(
  [Elements] => Array
  (
    [0] => stdClass Object
    (
        [Content] => [[delimiter]]Start of content section 1.
        [MoreContent] => <div id="div1">
                            <p><font><b>[[delimiter]]Start of content section 1.</b></font></p>
                            <p><span>More content in section 1</span></p>
                          </div>
    )

    [1] => stdClass Object
    (
        [Content] => [[delimiter]]Start of section 2
        [MoreContent] => <div id="div2">
                            <p><b><font>[[delimiter]]Start of section 2</font></b></p>
                            <span>More content in section 2</span>
                         </div>
    )

    [2] => stdClass Object
    (
        [Content] => [[delimiter]]Start of section 3
        [MoreContent] => <div id="div2">
                            <p><font>[[delimiter]]Start of section 3</font></p>
                         </div>
                         <div id="div3">
                            <span><font>More content in section 3</font></span>
                          </div>
    )
  )
)

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我已经决定这是一个有趣的理论练习,但却是一个实际的噩梦.您可能需要数百个示例来确保任何解决方案都能正常工作,然后正如您所说,有人带着示例101来再次破坏代码. (2认同)
TBH - 没有OP的输入,甚至很难验证对该文档所做的基本假设.即使是"父母有下一个兄弟"逻辑的跟踪备份文档的基础也可能过于简单化了可能的组合. (2认同)

Answer 2

Nig*_*Ren 3

到目前为止我得到的最近的是......

$html = <<<XML
<body>
    <div id="div1">
        <p>
            <font>
                <b>[[delimiter]]Start of content section 1.</b>
            </font>
        </p>
        <p>
            <span>More content in section 1</span>
        </p>
    </div>
    <div id="div2">
        <p>
            <b>
                <font>[[delimiter]]Start of section 2</font>
            </b>
        </p>
        <span>More content in section 2</span>
        <p>
            <font>[[delimiter]]Start of section 3</font>
        </p>
    </div>
    <div id="div3">
        <span>
            <font>More content in section 3</font>
        </span>
    </div>
</body>
XML;
$doc = new \DOMDocument();
$doc->loadHTML($html);
$xp = new DOMXPath($doc);
$div = $xp->query("body/node()[descendant::*[contains(text(),'[[delimiter]]')]]");

foreach ($div as $child) {
    echo "Div=".$doc->saveHTML($child).PHP_EOL;
}

echo "Last bit...".$doc->saveHTML($child).PHP_EOL;
$div = $xp->query("following-sibling::*", $child);
foreach ($div as $remain) {
    echo $doc->saveHTML($remain).PHP_EOL;
}

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我想我必须调整 HTML 来纠正（希望如此）错误的缺失</div>.

看看它有多强大会很有趣，但很难测试。

“最后一位”尝试获取 in 中最后一个标记的元素（在本例中为 div2），直到文档末尾（使用following-sibling::*）。

另请注意，它假定 body 标记是文档的基础。因此，需要对此进行调整以适合您的文档。这可能就像将其更改为一样简单//body...

更新具有更多的灵活性和处理同一整体段中多个部分的能力......

$html = <<<XML
    <html>
    <body>
        <div id="div1">
            <p>
                <font>
                    <b>[[delimiter]]Start of content section 1.</b>
                </font>
            </p>
            <p>
                <span>More content in section 1</span>
            </p>
        </div>
        <div id="div1a">
            <p>
                <span>More content in section 1</span>
            </p>
        </div>
        <div id="div2">
            <p>
                <b>
                    <font>[[delimiter]]Start of section 2</font>
                </b>
            </p>
            <span>More content in section 2</span>
            <p>
                <font>[[delimiter]]Start of section 3</font>
            </p>
        </div>
        <div id="div3">
            <span>
                <font>More content in section 3</font>
            </span>
        </div>
    </body>
    </html>
XML;

$doc = new \DOMDocument();
$doc->loadHTML($html);
$xp = new DOMXPath($doc);
$div = $xp->query("//body/node()[descendant::*[contains(text(),'[[delimiter]]')]]");

$partCount = $div->length;
for ( $i = 0; $i < $partCount; $i++ )  {
    echo "Div $i...".$doc->saveHTML($div->item($i)).PHP_EOL;

    // Check for multiple sections in same element
    $count = $xp->evaluate("count(descendant::*[contains(text(),'[[delimiter]]')])",
            $div->item($i));
    if ( $count > 1 )   {
        echo PHP_EOL.PHP_EOL;
        for ($j = 0; $j< $count; $j++ ) {
            echo "Div $i.$j...".$doc->saveHTML($div->item($i)).PHP_EOL;
        }
    }
    $div = $xp->query("following-sibling::*", $div->item($i));
    foreach ($div as $remain) {
        if ( $i < $partCount-1 && $remain === $div->item($i+1)  )   {
            break;
        }
        echo $doc->saveHTML($remain).PHP_EOL;
    }

    echo PHP_EOL.PHP_EOL;
}

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