如何使用PHP Dom提取innerHTML

Question

我目前使用nodeValue为我提供HTML输出，但它剥离了HTML代码，只提供纯文本。有人知道我如何修改代码，通过使用元素的ID为我提供元素的内部HTML吗？

function getContent($url, $id){
// This first section gets the HTML stuff using a URL
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
$html = curl_exec($ch);
curl_close($ch);
// This second section analyses the HTML and outputs it
$newDom = new domDocument;
$newDom->loadHTML($html);
$newDom->preserveWhiteSpace = false;
$newDom->validateOnParse = true;
$sections = $newDom->getElementById($id)->nodeValue;
echo $sections;

}

Answer 1

这对我有效：

$sections = $newDom->saveXML($newDom->getElementById($id));

http://www.php.net/manual/en/domdocument.savexml.php

如果你有PHP 5.3.6，这可能也是一个选项：

$sections = $newDom->saveHTML($newDom->getElementById($id));

http://www.php.net/manual/en/domdocument.savehtml.php

Answer 2

我已经修改了代码，它对我来说很好。请在下面找到代码

    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
    $html = curl_exec($ch);
    curl_close($ch);
    $newDom = new domDocument;
    libxml_use_internal_errors(true);
    $newDom->loadHTML($html);
    libxml_use_internal_errors(false);
    $newDom->preserveWhiteSpace = false;
    $newDom->validateOnParse = true;
    $sections = $newDom->saveHTML($newDom->getElementById('colophon'));   
    echo $sections;