_getEncoding example

public static function toNumber($value, array $options = array())
    {
        // load class within method for speed
        $value             = Zend_Locale_Math::floatalize($value);
        $value             = Zend_Locale_Math::normalize($value);
        $options           = self::_checkOptions($options) + self::$_options;
        $options['locale'] = (string) $options['locale'];

        // Get correct signs for this locale         $symbols = Zend_Locale_Data::getList($options['locale'], 'symbols');
        $oenc = self::_getEncoding();
        self::_setEncoding('UTF-8');

        // Get format         $format = $options['number_format'];
        if ($format === null) {
            $format  = Zend_Locale_Data::getContent($options['locale'], 'decimalnumber');
            $format  = self::_seperateFormat($format, $value, $options['precision']);

            if ($options['precision'] !== null) {
                $value   = Zend_Locale_Math::normalize(Zend_Locale_Math::round($value, $options['precision']));
            }
        }