如何获得DOMNode的innerHTML?

时间:2010-01-18 15:34:43

标签: php dom innerhtml

在PHP DOM实现中,您使用什么函数来获取给定DOMNode的innerHTML?有人能给出可靠的解决方案

当然,outerHTML也会这样做。

8 个答案:

答案 0 :(得分:138)

Compare此更新版本PHP Manual User Note #89718

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

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

    return $innerHTML; 
} 
?> 

示例:

<?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); 
} 
?> 

答案 1 :(得分:22)

以下是函数式编程样式的版本:

function innerHTML($node) {
    return implode(array_map([$node->ownerDocument,"saveHTML"], 
                             iterator_to_array($node->childNodes)));
}

答案 2 :(得分:11)

要返回元素的html,您可以使用C14N()

$dom = new DOMDocument();
$dom->loadHtml($html);
$x = new DOMXpath($dom);
foreach($x->query('//table') as $table){
    echo $table->C14N();
}

答案 3 :(得分:6)

Haim Evgi答案的简化版本:

catch

使用示例:

<?php

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

    $html = '';

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

    return $html;
}

无需设置<?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> */ preserveWhiteSpace

答案 4 :(得分:4)

除了包含array_mapimplode的trincot不错的版本,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,为什么没有接受数组和迭代器的reduce()方法。

答案 5 :(得分: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);
  }
}

答案 6 :(得分:1)

这是Drupella在php.net上基于this comment的另一种方法,对我的项目效果很好。它通过创建新的innerHTML()来定义DOMDocument,然后将目标节点导入并附加到目标节点,而不是显式遍历子节点。

InnerHTML

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来包含/排除外部目标标签。

用法示例

在这里,我们提取由“ first” id属性给定的目标标签的内部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>
}

实时示例:

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

答案 7 :(得分:1)

旧查询,但是有一个内置方法可以做到这一点。只需将目标节点传递到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>