rex_formatter::format PHP Method

    public static function format($value, $formatType, $format)
    {
        if (!is_callable([__CLASS__, $formatType])) {
            throw new InvalidArgumentException('Unknown $formatType: "' . $formatType . '"!');
        }
        return self::$formatType($value, $format);
    }

 function formatValue()
 {
     $value = $this->getValue();
     $format_type = $this->getFormatType();
     if ($format_type != '') {
         $value = rex_formatter::format($value, $format_type, $this->getFormat());
     }
     return $value;
 }