CNumberValidator

public function clientValidateAttribute($object,$attribute)
{
    $label=$object->getAttributeLabel($attribute);

    if(($message=$this->message)===null)
        $message=$this->integerOnly ? Yii::t('yii','{attribute} must be an integer.') : Yii::t('yii','{attribute} must be a number.');
    $message=strtr($message, array(
        '{attribute}'=>$label,
    ));

    if(($tooBig=$this->tooBig)===null)
        $tooBig=Yii::t('yii','{attribute} is too big (maximum is {max}).');
    $tooBig=strtr($tooBig, array(
        '{attribute}'=>$label,
        '{max}'=>$this->max,
    ));

    if(($tooSmall=$this->tooSmall)===null)
        $tooSmall=Yii::t('yii','{attribute} is too small (minimum is {min}).');
    $tooSmall=strtr($tooSmall, array(
        '{attribute}'=>$label,
        '{min}'=>$this->min,
    ));

    $pattern=$this->integerOnly ? $this->integerPattern : $this->numberPattern;
    $js="
if(!value.match($pattern)) {
messages.push(".CJSON::encode($message).");
}
";
    if($this->min!==null)
    {
        $js.="
if(value<{$this->min}) {
messages.push(".CJSON::encode($tooSmall).");
}
";
    }
    if($this->max!==null)
    {
        $js.="
if(value>{$this->max}) {
messages.push(".CJSON::encode($tooBig).");
}
";
    }

    if($this->allowEmpty)
    {
        $js="
if(jQuery.trim(value)!='') {
$js
}
";
    }

    return $js;
}

protected function validateAttribute($object,$attribute)
{
    $value=$object->$attribute;
    if($this->allowEmpty && $this->isEmpty($value))
        return;
    if(!is_numeric($value))
    {
        // https://github.com/yiisoft/yii/issues/1955
        // https://github.com/yiisoft/yii/issues/1669
        $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be a number.');
        $this->addError($object,$attribute,$message);
        return;
    }
    if($this->integerOnly)
    {
        if(!preg_match($this->integerPattern,"$value"))
        {
            $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be an integer.');
            $this->addError($object,$attribute,$message);
        }
    }
    else
    {
        if(!preg_match($this->numberPattern,"$value"))
        {
            $message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be a number.');
            $this->addError($object,$attribute,$message);
        }
    }
    if($this->min!==null && $value<$this->min)
    {
        $message=$this->tooSmall!==null?$this->tooSmall:Yii::t('yii','{attribute} is too small (minimum is {min}).');
        $this->addError($object,$attribute,$message,array('{min}'=>$this->min));
    }
    if($this->max!==null && $value>$this->max)
    {
        $message=$this->tooBig!==null?$this->tooBig:Yii::t('yii','{attribute} is too big (maximum is {max}).');
        $this->addError($object,$attribute,$message,array('{max}'=>$this->max));
    }
}