CODEWITHSUNDEEP
phpdomdocument
user398341
user398341

Reputation: 6587

PHP DomDocument output without <?xml version="1.0" encoding="UTF-8"?>

is there an option with DomDocument to remove the first line:

<?xml version="1.0" encoding="UTF-8"?>

The class instantiation automatically adds it to the output, but is it possible to get rid of it?

Upvotes: 37

Views: 24041

Answers (5)

Nuryagdy Mustapayev
Nuryagdy Mustapayev

Reputation: 785

I had the same problem, but I am using symfony/serializer for XML creation. If you also want to achieve this with Symfony serializer you can do in this way:

$encoder = new \Symfony\Component\Serializer\Encoder\XmlEncoder();

$encoder->encode($nodes[$rootNodeName], 'xml', [
    XmlEncoder::ROOT_NODE_NAME => $rootNodeName,
    XmlEncoder::ENCODING       => $encoding,
    XmlEncoder::ENCODER_IGNORED_NODE_TYPES => [
          XML_PI_NODE, //this flag is the solution
    ],
]);

Upvotes: 3

hrvoj3e
hrvoj3e

Reputation: 2754

I think using DOMDocument is a universal solution for valid XML files:

If you have XML already loaded in a variable:

$t_xml = new DOMDocument();
$t_xml->loadXML($xml_as_string);
$xml_out = $t_xml->saveXML($t_xml->documentElement);

For XML file from disk:

$t_xml = new DOMDocument();
$t_xml->load($file_path_to_xml);
$xml_out = $t_xml->saveXML($t_xml->documentElement);

This comment helped: http://www.php.net/manual/en/domdocument.savexml.php#88525

Upvotes: 37

Luke Madhanga
Luke Madhanga

Reputation: 7487

For me, none of the answers above worked:

$dom = new \DOMDocument();
$dom->loadXXX('<?xml encoding="utf-8" ?>' . $content);  // loadXML or loadHTML
$dom->saveXML($dom->documentElement);

The above didn't work for me if I had partial HTML, e.g.

<p>Lorem</p>
<p>Ipsum</p>

As it then removed the everything after <p>Lorem</p>.

The only solution that worked for me was:

foreach ($doc->childNodes as $xx) {
    if ($xx instanceof \DOMProcessingInstruction) {
        $xx->parentNode->removeChild($xx);
    }
}

Upvotes: 0

Byron Whitlock
Byron Whitlock

Reputation: 53921

You can use output buffering to remove it. A bit of a hack but it works.

ob_start();

// dom stuff

$output = ob_get_contents();
ob_end_clean();

$clean = preg_replace("/(.+?\n)/","",$output);

Upvotes: -1

user268396
user268396

Reputation: 12006

If you want to output HTML, use the saveHTML() function. It automatically avoids a whole lot of XML idiom and handles closed/unclosed HTML idiom properly.

If you want to output XML you can use the fact that DOMDocument is a DOMNode (namely: '/' in XPath expression), thus you can use DOMNode API calls on it to iterate over child nodes and call saveXML() on each child node. This does not output the XML declaration, and it outputs all other XML content properly.

Example:

$xml = get_my_document_object();
foreach ($xml->childNodes as $node) {
   echo $xml->saveXML($node);
}

Upvotes: 15

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