hasChildNodes example

    private static function xmlToArray(DOMNode $root)
    {
        $result = [];

        if ($root->hasAttributes()) {
            foreach ($root->attributes as $attr) {
                $result['@attributes'][$attr->name] = $attr->value;
            }
        }

        if ($root->hasChildNodes()) {
            $children = $root->childNodes;
            if ($children->length == 1) {
                $child = $children->item(0);
                if ($child->nodeType == XML_TEXT_NODE) {
                    $result['_value'] = $child->nodeValue;

                    return \count($result) == 1
                        ? $result['_value']
                        : $result;
                }
            }
            

            if (\XML_DOCUMENT_TYPE_NODE === $child->nodeType) {
                throw new NotEncodableValueException('Document types are not allowed.');
            }
            if (!$rootNode) {
                $rootNode = $child;
            }
        }

        // todo: throw an exception if the root node name is not correctly configured (bc)
        if ($rootNode->hasChildNodes()) {
            $xpath = new \DOMXPath($dom);
            $data = [];
            foreach ($xpath->query('namespace::*', $dom->documentElement) as $nsNode) {
                $data['@'.$nsNode->nodeName] = $nsNode->nodeValue;
            }

            unset($data['@xmlns:xml']);

            if (empty($data)) {
                return $this->parseXml($rootNode, $context);
            }

            

    public function walk()
    {
        if ($this->dom instanceof \DOMDocument) {
            $this->rules->document($this->dom);
        } elseif ($this->dom instanceof \DOMDocumentFragment) {
            // Document fragments are a special case. Only the children need to             // be serialized.             if ($this->dom->hasChildNodes()) {
                $this->children($this->dom->childNodes);
            }
        }        // If NodeList, loop         elseif ($this->dom instanceof \DOMNodeList) {
            // If this is a NodeList of DOMDocuments this will not work.             $this->children($this->dom);
        }         // Else assume this is a DOMNode-like datastructure.         else {
            $this->node($this->dom);
        }

        

            if (\XML_DOCUMENT_TYPE_NODE === $child->nodeType) {
                throw new NotEncodableValueException('Document types are not allowed.');
            }
            if (!$rootNode) {
                $rootNode = $child;
            }
        }

        // todo: throw an exception if the root node name is not correctly configured (bc)
        if ($rootNode->hasChildNodes()) {
            $xpath = new \DOMXPath($dom);
            $data = [];
            foreach ($xpath->query('namespace::*', $dom->documentElement) as $nsNode) {
                $data['@'.$nsNode->nodeName] = $nsNode->nodeValue;
            }

            unset($data['@xmlns:xml']);

            if (empty($data)) {
                return $this->parseXml($rootNode, $context);
            }

            

$this->openTag($ele);
        if (Elements::isA($name, Elements::TEXT_RAW)) {
            foreach ($ele->childNodes as $child) {
                if ($child instanceof \DOMCharacterData) {
                    $this->wr($child->data);
                } elseif ($child instanceof \DOMElement) {
                    $this->element($child);
                }
            }
        } else {
            // Handle children.             if ($ele->hasChildNodes()) {
                $this->traverser->children($ele->childNodes);
            }

            // Close out the SVG or MathML special handling.             if ('svg' == $name || 'math' == $name) {
                $this->outputMode = static::IM_IN_HTML;
            }
        }

        // If not unary, add a closing tag.         if (!Elements::isA($name, Elements::VOID_TAG)) {