yii\validators\NumberValidator::init PHP Метод

    public function init()
    {
        parent::init();
        if ($this->message === null) {
            $this->message = $this->integerOnly ? Yii::t('yii', '{attribute} must be an integer.') : Yii::t('yii', '{attribute} must be a number.');
        }
        if ($this->min !== null && $this->tooSmall === null) {
            $this->tooSmall = Yii::t('yii', '{attribute} must be no less than {min}.');
        }
        if ($this->max !== null && $this->tooBig === null) {
            $this->tooBig = Yii::t('yii', '{attribute} must be no greater than {max}.');
        }
    }