Export particular element in DOMDocument to string
Question
I'm importing some arbitrary HTML into a DOMDocument using the loadHTML() function, eg.:
$html = '<p><a href="test.php">Test</a></p>';
$doc = new DOMDocument;
$doc->loadHTML($html);
I then want to change a few attributes/node values using DOMDocument methods which I can do no problem.
Once I've made these changes I'd like to export the HTML string (using ->saveHTML() ), without the <html><body>... tags that the DOMDocument automatically adds to the HTML.
I understand why these are added (to ensure a valid document), but how would I go about just getting my edited HTML back (essentially everything between the <body> tags)?
I have read this post and while it offers some solutions I would rather do this 'properly', ie without using a string replace on the <body> tags. Validity of the HTML is not an issue as it's run through an HTML purifier before hand.
Any ideas? Thanks.
EDIT
I'm aware of the $node parameter added to saveHTML() in PHP 5.3.6, unfortunately I'm stuck with 5.2.
3 answers
solution1
4 ACCPTED 2011-11-02 10:51:06
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:
solution2
2 2011-11-02 11:05:26
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>
solution3
-1 2017-02-01 09:04:51
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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