Prado\Web\UI\WebControls\TCompareValidator::evaluateIsValid PHP Method

    public function evaluateIsValid()
    {
        if (($value = $this->getValidationValue($this->getValidationTarget())) === '') {
            return true;
        }
        if (($controlToCompare = $this->getControlToCompare()) !== '') {
            if (($control2 = $this->findControl($controlToCompare)) === null) {
                throw new TInvalidDataValueException('comparevalidator_controltocompare_invalid');
            }
            if (($value2 = $this->getValidationValue($control2)) === '') {
                return false;
            }
        } else {
            $value2 = $this->getValueToCompare();
        }
        $values = $this->getComparisonValues($value, $value2);
        switch ($this->getOperator()) {
            case TValidationCompareOperator::Equal:
                return $values[0] == $values[1];
            case TValidationCompareOperator::NotEqual:
                return $values[0] != $values[1];
            case TValidationCompareOperator::GreaterThan:
                return $values[0] > $values[1];
            case TValidationCompareOperator::GreaterThanEqual:
                return $values[0] >= $values[1];
            case TValidationCompareOperator::LessThan:
                return $values[0] < $values[1];
            case TValidationCompareOperator::LessThanEqual:
                return $values[0] <= $values[1];
        }
        return false;
    }