Prado\Web\UI\WebControls\TDataTypeValidator::evaluateDataTypeCheck PHP Method

    protected function evaluateDataTypeCheck($value)
    {
        if ($value == '') {
            return true;
        }
        switch ($this->getDataType()) {
            case TValidationDataType::Integer:
                return preg_match('/^[-+]?[0-9]+$/', trim($value));
            case TValidationDataType::Float:
                return preg_match('/^[-+]?([0-9]*\\.)?[0-9]+([eE][-+]?[0-9]+)?$/', trim($value));
            case TValidationDataType::Date:
                $dateFormat = $this->getDateFormat();
                if (strlen($dateFormat)) {
                    $formatter = new TSimpleDateFormatter($dateFormat);
                    return $formatter->isValidDate($value);
                } else {
                    return strtotime($value) > 0;
                }
        }
        return true;
    }