105

在 PHP DOM 实现中,您使用什么函数来获取给定 DOMNode 的 innerHTML?有人可以提供可靠的解决方案吗?

当然,outerHTML 也可以。

4

9 回答 9

164

将此更新的变体与PHP Manual User Note #89718进行比较

<?php 
function DOMinnerHTML(DOMNode $element) 
{ 
    $innerHTML = ""; 
    $children  = $element->childNodes;

    foreach ($children as $child) 
    { 
        $innerHTML .= $element->ownerDocument->saveHTML($child);
    }

    return $innerHTML; 
} 
?> 

例子:

<?php 
$dom= new DOMDocument(); 
$dom->preserveWhiteSpace = false;
$dom->formatOutput       = true;
$dom->load($html_string); 

$domTables = $dom->getElementsByTagName("table"); 

// Iterate over DOMNodeList (Implements Traversable)
foreach ($domTables as $table) 
{ 
    echo DOMinnerHTML($table); 
} 
?> 
于 2010-01-18T15:38:51.747 回答
31

这是函数式编程风格的版本:

function innerHTML($node) {
    return implode(array_map([$node->ownerDocument,"saveHTML"], 
                             iterator_to_array($node->childNodes)));
}
于 2016-08-28T16:38:26.327 回答
15

要返回html元素的,可以使用C14N()

$dom = new DOMDocument();
$dom->loadHtml($html);
$x = new DOMXpath($dom);
foreach($x->query('//table') as $table){
    echo $table->C14N();
}
于 2016-05-13T19:25:36.823 回答
9

Haim Evgi 回答的简化版本:

<?php

function innerHTML(\DOMElement $element)
{
    $doc = $element->ownerDocument;

    $html = '';

    foreach ($element->childNodes as $node) {
        $html .= $doc->saveHTML($node);
    }

    return $html;
}

示例用法:

<?php

$doc = new \DOMDocument();
$doc->loadHTML("<body><div id='foo'><p>This is <b>an <i>example</i></b> paragraph<br>\n\ncontaining newlines.</p><p>This is another paragraph.</p></div></body>");

print innerHTML($doc->getElementById('foo'));

/*
<p>This is <b>an <i>example</i></b> paragraph<br>

containing newlines.</p>
<p>This is another paragraph.</p>
*/

无需设置preserveWhiteSpaceformatOutput

于 2016-06-28T14:42:28.597 回答
4

除了 trincot 的漂亮版本之外,还有array_mapimplode但这次是array_reduce

return array_reduce(
   iterator_to_array($node->childNodes),
   function ($carry, \DOMNode $child) {
        return $carry.$child->ownerDocument->saveHTML($child);
   }
);

仍然不明白,为什么没有reduce()接受数组和迭代器的方法。

于 2016-10-05T08:21:50.213 回答
3
function setnodevalue($doc, $node, $newvalue){
  while($node->childNodes->length> 0){
    $node->removeChild($node->firstChild);
  }
  $fragment= $doc->createDocumentFragment();
  $fragment->preserveWhiteSpace= false;
  if(!empty($newvalue)){
    $fragment->appendXML(trim($newvalue));
    $nod= $doc->importNode($fragment, true);
    $node->appendChild($nod);
  }
}
于 2014-06-05T18:55:46.640 回答
3

这是另一种基于Drupella 在 php.net上的评论的方法,它对我的​​项目很有效。innerHTML()通过创建一个新的DOMDocument、导入并附加到目标节点来定义 ,而不是显式地迭代子节点。

内部HTML

让我们定义这个辅助函数:

function innerHTML( \DOMNode $n, $include_target_tag = true ) {
  $doc = new \DOMDocument();
  $doc->appendChild( $doc->importNode( $n, true ) );
  $html = trim( $doc->saveHTML() );
  if ( $include_target_tag ) {
      return $html;
  }
  return preg_replace( '@^<' . $n->nodeName .'[^>]*>|</'. $n->nodeName .'>$@', '', $html );
}

我们可以通过第二个输入参数包含/排除外部目标标签。

使用示例

在这里,我们为“first”id 属性给出的目标标签提取内部 HTML:

$html = '<div id="first"><h1>Hello</h1></div><div id="second"><p>World!</p></div>';
$doc  = new \DOMDocument();
$doc->loadHTML( $html );
$node = $doc->getElementById( 'first' );

if ( $node instanceof \DOMNode ) {

    echo innerHTML( $node, true );
    // Output: <div id="first"><h1>Hello</h1></div>    

    echo innerHTML( $node, false );
    // Output: <h1>Hello</h1>
}

现场示例:

http://sandbox.onlinephpfunctions.com/code/2714ea116aad9957c3c437d46134a1688e9133b8

于 2018-12-12T10:05:37.917 回答
2

旧查询,但有一个内置方法可以做到这一点。只需将目标节点传递给DomDocument->saveHtml().

完整示例:

$html = '<div><p>ciao questa è una <b>prova</b>.</p></div>';
$dom = new DomDocument($html);
@$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
$node = $xpath->query('.//div/*'); // with * you get inner html without surrounding div tag; without * you get inner html with surrounding div tag
$innerHtml = $dom->saveHtml($node);
var_dump($innerHtml);

输出:<p>ciao questa è una <b>prova</b>.</p>

于 2020-03-13T15:49:35.550 回答
1

对于想要从 XPath 查询中获取 HTML 的人,这是我的版本:

$xpath = new DOMXpath( $my_dom_object );

$DOMNodeList = $xpath->query('//div[contains(@class, "some_custom_class_in_html")]');

if( $DOMNodeList->count() > 0 ) {
    $page_html = $my_dom_object->saveHTML( $DOMNodeList->item(0) );
}
于 2021-10-26T03:31:58.783 回答