1.在控制器里面新建Helloworld控制器

class HelloworldController extends Controller{
    public function actionFeedback(){
        $model= new FeedbackForm;//实例化一个from
        $model->unsetAttributes();  // 清除默认值
        if(isset($_POST['FeedbackForm'])){//判断是否提交
            $model->attributes=$_POST['FeedbackForm'];//获得from表单的内容
            if($model->validate()){//进行验证（FeedbackForm方法里面的rules验证）
                $this->renderPartial('feedbackshow',array('model'=>$model));
            }else{
                var_dump($model->geterrors());//验证失败把失败原因打印出来
            } 
        }else{
            $this->renderPartial('feedback',array('model'=>$model));
        }
    }
}

2.在model下面新建FeedbackForm

class FeedbackForm extends CFormModel{
    public $name;
    public $email;
    public $subject;
    public $body;
    public function rules(){
        return array(
                array('name,email,subject,body','required'),//不能为空
                array('email','email'),//email格式验证
                );
    }
    public function attributeLabels()//给变量别名
    {
        return array(
            'subject'=>'主题',
            'name'=>'用户名',
            'email'=>'E-mail',
            'body'=>'内容'
        );
    }
}

3.在view里面新建Helloworld文件夹，在文件夹里面新建feedback、feedbackshow视图 feedback:

<?php header('Content-Type:text/html;charset=UTF-8');?>
<div>
<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'feedback-form',
    'enableAjaxValidation'=>false,//是否使指定的属性的AJAX验证可用。默认值是false。
    'enableClientValidation'=>true,  //是否使客户端验证可用。默认值是false。 
    //下面是当表单被提交时是否执行AJAX验证。如果存在任何验证错误，表单的提交动作将被停止。默认值是false。   
    'clientOptions'=>array('validateOnSubmit'=>true),

)); ?>
<?php echo $form->hiddenField($model,'uid',array('value'=>Yii::app()->user->userid));//隐藏input示例 ?>
    <div>
        <?php echo $form->labelEx($model,'name');?>
        <?php echo $form->textField($model,'name');?>
        <?php echo $form->error($model,'name'); ?>
    </div>
    <div>
        <?php echo $form->labelEx($model,'email');?>
        <?php echo $form->textField($model,'email');?>
        <?php echo $form->error($model,'email'); ?>
    </div>
    <div>
        <?php echo $form->labelEx($model,'subject');?>
        <?php echo $form->textField($model,'subject',array('size'=>60,'maxlength'=>128));?>
        <?php echo $form->error($model,'subject'); ?>
    </div>
    <div>
        <?php echo $form->labelEx($model,'body');?>
        <?php echo $form->textArea($model,'body',array('rows'=>6,'cols'=>50));?>
        <?php echo $form->error($model,'body'); ?>
    </div>
    <div>
        <?php echo CHtml::submitButton('提交');?>
    </div>
<?php $this->endWidget();?>
</div>

feedbackshow:

<?php header('Content-Type:text/html;charset=UTF-8');?>
<div>
    <div>
        <?php echo "姓名:";?>
        <?php echo $model->name;?>
    </div>
    <div>
        <?php echo "E-mail:";?>
        <?php echo $model->email;?>
    </div>
    <div>
        <?php echo "主题：";?>
        <?php echo $model->subject;?>
    </div>
    <div>
        <?php echo "内容:";?>
        <?php echo $model->body;?>
    </div>
</div>