KeyValue.php

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<?php

namespace Sabre\VObject\Parser\XML\Element;

use Sabre\Xml as SabreXml;

class KeyValue extends SabreXml\Element\KeyValue {

    static function xmlDeserialize(SabreXml\Reader $reader) {

        // If there's no children, we don't do anything.
        if ($reader->isEmptyElement) {
            $reader->next();
            return [];
        }

        $values = [];
        $reader->read();

        do {

            if ($reader->nodeType === SabreXml\Reader::ELEMENT) {

                $name = $reader->localName;
                $values[$name] = $reader->parseCurrentElement()['value'];

            } else {
                $reader->read();
            }

        } while ($reader->nodeType !== SabreXml\Reader::END_ELEMENT);

        $reader->read();

        return $values;

    }

}