XML

<?php
if (!ini_get('allow_url_fopen')) {
    die();
}
$handle = fopen('http://www.cctld.uz/rss/', 'rb');

if ($handle) {
    $rss = stream_get_contents($handle);
}
fclose($handle);
define('PUBS_FILE_NAME', 'names.xml');
if (is_file(PUBS_FILE_NAME)) {
    if ($pubsFile = fopen(PUBS_FILE_NAME, 'rb')) {
        $pubsFile = fread($pubsFile, filesize(PUBS_FILE_NAME));
        if ($pubsFile) {
            $pubsFile = new SimpleXmlElement($pubsFile, LIBXML_NOCDATA);
        }
    }
} else {
    $pubsFile = new DOMDocument("1.0", "UTF-8");
    $pubsFile->formatOutput = true;
    $tmpPubsFile = '';
}
$rss = new SimpleXmlElement($rss, LIBXML_NOCDATA);

if(isset($rss->channel->item)) parseRSS($rss);
#if(isset($rss->entry)) parseAtom($rss);

function parseRSS($rss) {
    global $pubsFile, $tmpPubsFile;
    foreach ($rss->channel->item as $e) {
        if ( stripos((string)$e->title[0], 'новые') !== false ) {
            writeRssData($e->pubDate, $e->description);
        }
    }
    # write data stored in $pubsFile variable
    $pubsFile = new DOMDocument();
    $pubsFile->loadXML($tmpPubsFile);
    $pubsFile->save(PUBS_FILE_NAME);
}
function writeRssData($pubDate, $description){
    global $pubsFile, $data, $pubsFileYears, $tmpPubsFile;
    $day = date('d', strtotime($pubDate));
    $month = date('F', strtotime($pubDate));
    $year = date('Y', strtotime($pubDate));
    if (isset($pubsFile->data)) {
        # open & read
        echo 'file';
    } else {
        if ($pubsFile->getElementById($pubDate) === NULL) {
            $data = $pubsFile->getElementsByTagName('data')->item(0);
            #if ($data->length == 0) {
            if (!$data) {
                $data = $pubsFile->createElement("data");

            }
            $pubsFile->appendChild($data);
            #if ($pubsFileYears->length == 0){
            $pubsFileYears = $pubsFile->getElementsByTagName('years')->item(0);
            if (!$pubsFileYears){
                $pubsFileYears = $pubsFile->createElement('years');
                $pubsFileYearsId = $pubsFile->createAttribute('id');
                $pubsFileYearsId->value = 'years';
                $pubsFileYears->value = $pubsFileYearsId;

            }
            $data->appendChild($pubsFileYears);

            $pubsFileYear = $pubsFile->getElementById($year);
            if (!$pubsFileYear) {
                $pubsFileYear = $pubsFile->createElement('year');
                $pubsFileYearId = $pubsFile->createAttribute('id');
                $pubsFileYearId->value = $year;
                $pubsFileYear->appendChild($pubsFileYearId);
            }
            $pubsFileYears->appendChild($pubsFileYear);

            $pubsFileMonth = $pubsFile->getElementById(date('m', strtotime($pubDate)).'.'.$year);
            if ($pubsFileMonth === NULL) {
                $pubsFileMonth = $pubsFile->createElement('month');
                $pubsFileMonthId = $pubsFile->createAttribute('id');
                $pubsFileMonthId->value = date('m', strtotime($pubDate)).'.'.$year;
                $pubsFileMonth->appendChild($pubsFileMonthId);
            }
            $pubsFileYear->appendChild($pubsFileMonth);

            $pubsFileDay = $pubsFile->createElement('day');
            $pubsFileDayId = $pubsFile->createAttribute('id');
            $pubsFileDayId->value = $day.'.'.date('m', strtotime($pubDate)).'.'.$year;
            $pubsFileDay->appendChild($pubsFileDayId);

            $pubsFileDescription = $pubsFile->createTextNode($description);
            $pubsFileDay->appendChild($pubsFileDescription);

            $pubsFileMonth->appendChild($pubsFileDay);

            $data->appendChild($pubsFileYears);

            $tmpPubsFile .= $data->ownerDocument->saveXML();
            #$tmpPubsFile = $pubsFile->saveXML();
            /*$pubsFile = new DOMDocument("1.0", "UTF-8");
            $tmpPubsFile = $pubsFile->importNode($data, TRUE);
            $pubsFile->appendChild($tmpPubsFile);*/
            #$pubsFile->loadXML($tmpPubsFile);
        }
    }