yii验证码的使用跟验证过程

如果要实现这个过程的话，需要几个步骤

第一步就是controller的操作

在要操作的控制器中添加如下代码：

public function actions(){return array( // captcha action renders the CAPTCHA image displayed on the contact page'captcha'=>array('class'=>'CCaptchaAction','backColor'=>0xFFFFFF, 'maxLength'=>'8', // 最多生成几个字符'minLength'=>'7', // 最少生成几个字符'height'=>'40','width'=>'230',), ); }public function accessRules(){return array(array('allow','actions'=>array('captcha'),'users'=>array('*'),),);}

第二步就是view的操作

在要显示验证码的地方添加如下代码：

widget('CCaptcha',array('showRefreshButton'=>true,'clickableImage'=>false,'buttonLabel'=>'刷新验证码','imageOptions'=>array('alt'=>'点击换图','title'=>'点击换图','style'=>'cursor:pointer','padding'=>'10'))); ?>

第三步就是LoginForm的操作

'登录帐号不能为空'),array('password','required','message'=>'密码不能为空'),array('verifyCode','required','message'=>'验证码不能为空'),array('verifyCode','captcha', 'on'=>'login','allowEmpty'=>!Yii::app()->admin->isGuest),// rememberMe needs to be a booleanarray('rememberMe', 'boolean'),// password needs to be authenticatedarray('password', 'authenticate'),);}/*** Declares attribute labels.*/public function attributeLabels(){return array('rememberMe'=>'下次记住我','verifyCode' =>'验证码');}/*** Authenticates the password.* This is the 'authenticate' validator as declared in rules().*/public function authenticate($attribute,$params){if(!$this->hasErrors()){$this->_identity=new UserIdentity($this->username,$this->password);if(!$this->_identity->authenticate())$this->addError('password','帐号或密码错误.');}}public function validateVerifyCode($verifyCode){if(strtolower($this->verifyCode) === strtolower($verifyCode)){return true;}else{$this->addError('verifyCode','验证码错误.');}}/*** Logs in the user using the given username and password in the model.* @return boolean whether login is successful*/public function login(){if($this->_identity===null){$this->_identity=new UserIdentity($this->username,$this->password);$this->_identity->authenticate();}if($this->_identity->errorCode===UserIdentity::ERROR_NONE){$duration=$this->rememberMe ? 3600*24*30 : 0; // 30 daysYii::app()->user->login($this->_identity,$duration);return true;}else{return false;}	}}

第四步，实现验证的过程，那么具体的查看我自己的写的一个方式，在第三部已经写好了
validateVerifyCode就是啦，可以在controller里面调用

我的调用如下：

public function actionLogin(){$model=new LoginForm;if(isset($_POST['ajax']) && $_POST['ajax']==='login-form'){echo CActiveForm::validate($model);Yii::app()->end();}if(isset($_POST['LoginForm'])){$model->attributes=$_POST['LoginForm'];// validate user input and redirect to the previous page if validif($model->validate() && $model->validateVerifyCode($this->createAction('captcha')->getVerifyCode()) && $model->login()){$this->redirect(CController::createUrl('default/index'));}}$this->render('login',array('model'=>$model));}