'php DOMDocument adds <html> headers with DOCTYPE declaration

I'm adding a #b hash to each link via the DOMDocument class.

        $dom = new DOMDocument();
        $dom->loadHTML($output);

        $a_tags = $dom->getElementsByTagName('a');

        foreach($a_tags as $a)
        {
            $value = $a->getAttribute('href');
            $a->setAttribute('href', $value . '#b');
        }

        return $dom->saveHTML();

That works fine, however the returned output includes a DOCTYPE declaration and a <head> and <body> tag. Any idea why that happens or how I can prevent that?

phpdomdocument


Solution 1:[1]

The real problem is the way the DOM is loaded. Use this instead:

$html->loadHTML($content, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

Please upvote the original answer here.

Solution 2:[2]

Adding $doc->saveHTML(false); will not work and it will return a error because it expects a node and not bool.

The solution I used:

return preg_replace('/^<!DOCTYPE.+?>/', '', str_replace( array('<html>', '</html>', '<body>', '</body>'), array('', '', '', ''), $doc->saveHTML()));

I`m using PHP >5.4

Solution 3:[3]

I solved this problem by creating new DOMDocument and copying child nodes from original to new one.

function removeDocType($oldDom) {
  $node = $oldDom->documentElement->firstChild
  $dom = new DOMDocument();
  foreach ($node->childNodes as $child) {
    $dom->appendChild($doc->importNode($child, true));
  }
  return $dom->saveHTML();
}

So insted of using 

return $dom->saveHTML();

I use:

return removeDocType($dom);

Solution 4:[4]

I was in the case where I want the html wrapper but not the DOCTYPE, the solution was in line with Tiago A.:

// Avoid adding the DOCTYPE header    
$dom->loadHTML($bodyContent, LIBXML_HTML_NODEFDTD);

// Avoid adding the DOCTYPE header AND html/body wrapper
$dom->loadHTML($bodyContent, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Bender the Greatest
Solution 2
Solution 3 Sigismund
Solution 4 Yhensel Benitez Tapia

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