找到带有“simple_HTML_DOM”的元素并将它们合并

Question

我想通过 simple_html_dom 提取 html 字符串的所有 p 元素。应该得到p元素的顺序。

<section class="box_1">
    <header class="trigger"><h2>Title</h2></header>
    <div class="content">
        <div class="box_2">
            <div class="class"></div>
            <div class="content">
                <p>Text Level 2</p>
                <p>More Text Level 2</p>
            </div>
        </div>
        <div class="box_2">
            <div class="class"></div>
            <div class="content">
                <p>Text Level 2</p>
                <div class="box_3">
                    <div class="content">
                        <p>Text Level 3</p>
                    </div>
                </div>
            </div>
        </div>
    </div>
</section>

但是同一个内容容器中的所有 p 元素都应该合并在一起。

我试过这个：

foreach($html->find('p') as $element) { 
    if ($element->parent()->parent()) {
        $class= $element->parent()->parent()->getAttribute('class');
        if ($class=="box_3") $level = 3;
        else if ($class=="box_2") $level = 2;
        else if ($class=="box_1") $level = 1;
    }
    else { $level = 0; }
    $array_content_element = array("level" => $level, "inhalt" => $element->plaintext);
    array_push($array_content, $array_content_element);
}

但是有了这个，即“Text Level 2”和“More Text Level 2”将作为两个元素处理。但它们应该合并到“Text Level 2\nMore Text Level 2”中，这应该作为一个元素来处理。

所以在这个例子中，结果应该是一个包含三个元素（而不是四个）的数组。

更新：我忘记了一些事情。在节元素之外可以有 p 元素。请看下面的“Lorem ipsum”。

<p>Lorem ipsum</p>
<p>Lorem ipsum</p>
<section class="box_1">
    <header class="trigger"><h2>Title</h2></header>
    <div class="content">
        <div class="box_2">
            <div class="class"></div>
            <div class="content">
                <p>Text Level 2</p>
                <p>More Text Level 2</p>
            </div>
        </div>
        <div class="box_2">
            <div class="class"></div>
            <div class="content">
                <p>Text Level 2</p>
                <div class="box_3">
                    <div class="content">
                        <p>Text Level 3</p>
                    </div>
                </div>
            </div>
        </div>
    </div>
</section>
<p>Lorem ipsum</p>
<p>Lorem ipsum</p>
<section class="box_1">
    <header class="trigger"><h2>Title</h2></header>
    <div class="content">
       <p>Text Level 1</p>
    </div>
</section>
<p>Lorem ipsum</p>
<p>Lorem ipsum</p>

这些 p 元素应该像其他元素一样对待（总结一个块的 p 元素）。在这种情况下，级别 = 0。

Answer 1

您必须首先确定哪个是哪个。是不是孤儿。然后，如果它到达批次的末尾，只需更改为下一个键/批次（不再有 p 标记）。考虑这个例子：

include 'simple_html_dom.php';
$html_string = '<p>Lorem ipsum</p><p>Lorem ipsum</p><section class="box_1"> <header class="trigger"><h2>Title</h2></header> <div class="content"> <div class="box_2"> <div class="class"></div> <div class="content"> <p>Text Level 2</p> <p>More Text Level 2</p> </div> </div> <div class="box_2"> <div class="class"></div> <div class="content"> <p>Text Level 2</p> <div class="box_3"> <div class="content"> <p>Text Level 3</p> </div> </div> </div> </div> </div></section><p>Lorem ipsum</p><p>Lorem ipsum</p><section class="box_1"> <header class="trigger"><h2>Title</h2></header> <div class="content"> <p>Text Level 1</p> </div></section><p>Lorem ipsum</p><p>Lorem ipsum</p>';
$html = str_get_html($html_string);
$array_content = array();
$index = 0;
foreach($html->find('p') as $key => $tag) {
    if($tag->parent()->tag == 'root') {
        // if alone p tag
        if(!isset($array_content[$index])) {
            $array_content[$index] = array('level' => 0, 'inhalt' => $tag->innertext);
        } else {
            $array_content[$index]['inhalt'] .= "\n" . $tag->innertext;
        }

    } elseif($tag->parent->class == 'content') {
        // handle tags with proper parents
        $type = $tag->parent->parent->class;
         switch($type) {
            case 'box_1': $level = 1; break;
            case 'box_2': $level = 2; break;
            case 'box_3': $level = 3; break;
        }

        if(!isset($array_content[$index])) {
            $array_content[$index] = array('level' => $level, 'inhalt' => $tag->innertext);
        } else {
            $array_content[$index]['inhalt'] .= "\n" . $tag->innertext;
        }

    }

    // change index if set to next batch
    if(!isset($tag->next_sibling()->tag) || $tag->next_sibling()->tag != 'p') {
        $index++;   
    }

}

echo '<pre>';
print_r($array_content);

应该输出：

Array
(
    [0] => Array
        (
            [level] => 0
            [inhalt] => Lorem ipsum
Lorem ipsum
        )

    [1] => Array
        (
            [level] => 2
            [inhalt] => Text Level 2
More Text Level 2
        )

    [2] => Array
        (
            [level] => 2
            [inhalt] => Text Level 2
        )

    [3] => Array
        (
            [level] => 3
            [inhalt] => Text Level 3
        )

    [4] => Array
        (
            [level] => 0
            [inhalt] => Lorem ipsum
Lorem ipsum
        )

    [5] => Array
        (
            [level] => 1
            [inhalt] => Text Level 1
        )

    [6] => Array
        (
            [level] => 0
            [inhalt] => Lorem ipsum
Lorem ipsum
        )

)