yii\validators\NumberValidator::validateValue PHP Метод

    protected function validateValue($value)
    {
        if (is_array($value) || is_object($value)) {
            return [Yii::t('yii', '{attribute} is invalid.'), []];
        }
        $pattern = $this->integerOnly ? $this->integerPattern : $this->numberPattern;
        if (!preg_match($pattern, "{$value}")) {
            return [$this->message, []];
        } elseif ($this->min !== null && $value < $this->min) {
            return [$this->tooSmall, ['min' => $this->min]];
        } elseif ($this->max !== null && $value > $this->max) {
            return [$this->tooBig, ['max' => $this->max]];
        } else {
            return null;
        }
    }