DOMDocument, Create new element node with several associated namespace

Question

Trying to create this structure, using DOMDocument.

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

  <xbrli:xbrl
      xmlns:link        = "http://www.xbrl.org/2003/linkbase"
      xmlns:se-gen-base = "http://www.taxonomier.se/se/fr/gen-base/2017-09-30"
      xmlns:iso4217     = "http://www.xbrl.org/2003/iso4217"
      xmlns:xlink       = "http://www.w3.org/1999/xlink"
      xmlns:xbrli       = "http://www.xbrl.org/2003/instance"
      xmlns:se-cd-base  = "http://www.taxonomier.se/se/fr/cd-base/2017-09-30"
  >

</xbrli:xbrl>

My current code:

$xml = new DomDocument('1.0', 'utf-8');
$xml->formatOutput = true;

$element = $xml->createElementNS('http://www.example.com/XFoo', 'xbrli:xbrl');
$xml->appendChild($element);

echo $xml->saveXML();

Result:

<?xml version="1.0" encoding="utf-8"?>
<xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/linkbase"/>

Joffrey Schmitz · Accepted Answer · 2020-02-06 21:11:56Z

1

You can add additional namespaces as standard attributes :

$xml = new DomDocument('1.0', 'utf-8');
$xml->formatOutput = true;

$element = $xml->createElement('xbrli:xbrl');

$namespaceList = array(
    'xmlns:link'        => "http://www.xbrl.org/2003/linkbase",
    'xmlns:se-gen-base' => "http://www.taxonomier.se/se/fr/gen-base/2017-09-30",
    'xmlns:iso4217'     => "http://www.xbrl.org/2003/iso4217",
    'xmlns:xlink'       => "http://www.w3.org/1999/xlink",
    'xmlns:xbrli'       => "http://www.xbrl.org/2003/instance",
    'xmlns:se-cd-base'  => "http://www.taxonomier.se/se/fr/cd-base/2017-09-30",
)
;

foreach($namespaceList as $key => $uri){
    $attr = $xml->createAttribute($key);
    $attr->value =  $uri;
    $element->appendChild($attr);
}

$xml->appendChild($element);

echo $xml->saveXML();

Output :

<?xml version="1.0" encoding="utf-8"?>
<xbrli:xbrl xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:se-gen-base="http://www.taxonomier.se/se/fr/gen-base/2017-09-30" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:se-cd-base="http://www.taxonomier.se/se/fr/cd-base/2017-09-30"/>

edited Feb 6, 2020 at 21:11

answered Feb 6, 2020 at 20:38

Joffrey Schmitz

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1 Comment

Joffrey Schmitz Over a year ago

It should be OK now

ThW · Accepted Answer · 2020-02-07 13:15:49Z

You're on the right track. If you work with namespaces, you should use the namespace aware methods (suffix NS). This will add namespace definitions implicitly (on use). You can still define them explicitly by setting them as an attribute:

$document = new DOMDocument('1.0', 'UTF-8');
$document->formatOutput = true;

// append returns the node, the create call can be nested
$element = $document->appendChild(
    // use the namespace aware method - this will add the namespace definition as needed
    $document->createElementNS('http://www.xbrl.org/2003/instance', 'xbrli:xbrl')
);

$namespaces = [
    'link' => "http://www.xbrl.org/2003/linkbase",
    'se-gen-base' => "http://www.taxonomier.se/se/fr/gen-base/2017-09-30",
    'iso4217' => "http://www.xbrl.org/2003/iso4217",
    'xlink' => "http://www.w3.org/1999/xlink",
    // 'xbrli' => "http://www.xbrl.org/2003/instance",
    'se-cd-base' => "http://www.taxonomier.se/se/fr/cd-base/2017-09-30",
];

foreach ($namespaces as $prefix => $namespaceURI) {
    // namespace definitions use a resevered namespace
    $element->setAttributeNS('http://www.w3.org/2000/xmlns/', 'xmlns:'.$prefix, $namespaceURI);
};

echo $document->saveXML();

Output:

<?xml version="1.0" encoding="UTF-8"?>
<xbrli:xbrl xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:se-gen-base="http://www.taxonomier.se/se/fr/gen-base/2017-09-30" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:se-cd-base="http://www.taxonomier.se/se/fr/cd-base/2017-09-30"/>

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