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Export particular element in DOMDocument to string

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一个人的身影
一个人的身影 2021-01-18 01:34

I\'m importing some arbitrary HTML into a DOMDocument using the loadHTML() function, eg.:

$html = \'
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  • 暖寄归人
    2021-01-18 02:12

    Perhaps the source code of this will help - They're using a regex to strip out the unnecessary strings:

    http://beerpla.net/projects/smartdomdocument-a-smarter-php-domdocument-class/

    $content = preg_replace(array("/^\<\!DOCTYPE.*?<html><body>/si",
                                  "!</body></html>$!si"),
                            "",
                            $this->saveHTML());

return $content;

    saveHTMLExact() - DOMDocument has an extremely badly designed "feature" where if the HTML code you are loading does not contain <html> and <body> tags, it adds them automatically (yup, there are no flags to turn this behavior off).

    Thus, when you call $doc->saveHTML(), your newly saved content now has <html><body> and DOCTYPE in it. Not very handy when trying to work with code fragments (XML has a similar problem).

    SmartDOMDocument contains a new function called saveHTMLExact() which does exactly what you would want – it saves HTML without adding that extra garbage that DOMDocument does.

    Also, other questions have asked similar things:

    How to saveHTML of DOMDocument without HTML wrapper?

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  • 花落未央
    2021-01-18 02:16

    Try using DOMDocument->saveXML()?

    <?php
$html = '<p><a href="test.php">Test</a></p>';
$doc = new DOMDocument();
$doc->loadHTML($html);
$domnodelist = $doc->getElementsByTagName('p');
$domnode = $domnodelist->item(0);
echo $doc->saveXML($domnode);
?>

    It outputs <p><a href="test.php">Test</a></p>

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  • 情话喂你
    2021-01-18 02:21

    Thanks but I won't necessarily know the type of the first tag in the body, it needs to be generic

    $domnodelist = $doc->getElementsByTagName('*');
$domnode = $domnodelist->item(0);
echo $doc->saveXML($domnode);
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