Helper::packUrlParameters

static function packUrlParameters($parameters = array())
{
	$params = array();
	foreach($parameters as $param => $value)
	{
		if($value <> '')
		{
			if(mb_strpos($param, '=') === 0)
			{
				// value goes as-is, unsafe
				$param = mb_substr($param, 1);
			}
			else
			{
				$value = urlencode($value);
			}

			$params[] = urlencode($param).'='.$value;
		}
	}

	return implode('&', $params);
}