private static function getLatestAvailableVersionNumber()
{
$releaseChannels = StaticContainer::get('\\Piwik\\Plugin\\ReleaseChannels');
$channel = $releaseChannels->getActiveReleaseChannel();
$url = $channel->getUrlToCheckForLatestAvailableVersion();
try {
$latestVersion = Http::sendHttpRequest($url, self::SOCKET_TIMEOUT);
} catch (\Exception $e) {
// e.g., disable_functions = fsockopen; allow_url_open = Off
$latestVersion = '';
}
return $latestVersion;
}