FileDiskProperty::getLength

static function getLength($property, $value)
{
	if(is_array($value['VALUE']))
	{
		$value['VALUE'] = array_diff($value['VALUE'], array(''));
		$value['VALUE'] = implode(',', $value['VALUE']);
		return mb_strlen(trim($value['VALUE'], "nrt"));
	}
	else
	{
		return mb_strlen(trim($value['VALUE'], "nrt"));
	}
}