/home/joan/000www/repo/spirit/1.0/core/extensions/xml/xml.php

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<?php
class SimpleXMLResponse
{
    private $_xml = NULL;
    public function __construct ()
    {
        if ($this->_xml == NULL) {
            $this->_xml = new XMLWriter();
        }
        $this->_xml->openMemory();
        $this->_xml->startDocument('1.0', 'UTF-8');
        $this->_xml->openURI('php://output');
        $this->_xml->setIndent(true);
        $this->_xml->startElement('response');
    }
    public function add_node ($arr)
    {
        $this->_xml->startElement('row');
        if (! is_array($arr)) {
            $arr = Util::getParams(func_get_args());
        }
        foreach ($arr as $key => $value) {
            $this->_xml->writeAttribute($key, $value);
        }
        $this->_xml->endElement();
    }
    public function add_data ($content)
    {
        $this->_xml->startElement('data');
        $this->_xml->writeCData($content);
        $this->_xml->endElement();
    }
    public function out_response ()
    {
        header('Content-Type: text/xml');
        header('Pragma: no-cache');
        header('Expires: 0');
        $this->_xml->endElement(); // end <response>
        print $this->_xml->outputMemory(true);
    }
}

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