CActiveForm實(shí)際上是對(duì)Chtml類的封裝，它與Chmtl不同的地方是CActiveForm提供了驗(yàn)證機(jī)制,，有三種：
   服務(wù)器端/客戶端/ajax驗(yàn)證

   基本表單：
   <?php $form=$this->beginWidget('CActiveForm',
  array(
   'id'=>'contact_form',
   'enableAjaxValidation'=>true//是否是ajax驗(yàn)證

//'enableClientValidation'=>true,//是否客戶端驗(yàn)證
   //'action'=>'site/contact',
   //'method'=>'get',
  ) 
  ); ?>
 <p class="note">Fields with <span class="required">*</span> are required.</p>

 <div class="row">
  <?php echo $form->labelEx($model,'name');  ?>
  <?php echo $form->textField($model,'name');?>
  <?php 
   //單獨(dú)顯示錯(cuò)誤信息 
   echo $form->error($model,'name');    
  ?>
  
 </div>

 <div class="row">
  <?php echo $form->labelEx($model,'email'); ?>
  <?php echo $form->textField($model,'email'); ?>
  <?php 
   //單獨(dú)顯示錯(cuò)誤信息 
   echo $form->error($model,'email');    
  ?>
 </div>

 <div class="row">
  <?php echo $form->labelEx($model,'subject'); ?>
  <?php echo $form->textField($model,'subject',array('size'=>60,'maxlength'=>128)); ?>
 </div>

 <div class="row">
  <?php echo $form->labelEx($model,'body'); ?>
  <?php echo $form->textArea($model,'body',array('rows'=>6, 'cols'=>50)); ?>
 </div>
 <?php
   $model -> name = 0;
  
    echo $form->radioButtonList($model,'name',

       array('1'=>'Male','0'=>'Female'),

       array('separator'=>' ','labelOptions'=>array('class'=>''))

  )
  ?>
  <div class="row">
  <?php echo $form->labelEx($model,'label:'); ?>
 <?php 
 
    $model ->name = array(1,2,3,4);//設(shè)定checkbox的默認(rèn)值，其實(shí)應(yīng)該在controller里面設(shè)定最好,radio,select的設(shè)定方法和這個(gè)一樣
    echo $form->checkBoxList($model,'name',

       array('1'=>'Football','2'=>'Music','3'=>'Game','4'=>'basketball'),

       array('separator'=>' ','labelOptions'=>array('class'=>'mylabel'))

  )
 ?>
 </div>
 <?php if(extension_loaded('gd')): ?>
 <div class="row">
  <?php echo $form->labelEx($model,'verifyCode'); ?>
  <div>
  <?php $this->widget('CCaptcha'); ?>
  <?php echo $form->textField($model,'verifyCode'); ?>
  </div>
  <div class="hint">Please enter the letters as they are shown in the image above.
  <br/>Letters are not case-sensitive.</div>
 </div>
 <?php endif; ?>

 <div class="row submit">
  <?php 
   
   echo CHtml::submitButton('Submit'); 
  ?>
 </div>
  //總體顯示錯(cuò)誤信息
 <?php echo $form->errorSummary($model); ?>
<?php $this->endWidget(); ?>

1、如果開啟ajax驗(yàn)證在controller端實(shí)現(xiàn)代碼：