本文实例讲述了Yii框架实现的验证码、登录及退出功能。分享给大家供大家参考，具体如下：
捣鼓了一下午，总算走通了，下面贴出代码。
Model
<?php class Auth extends CActiveRecord { public static function model($className = __CLASS__) { return parent::model($className); } public function tableName() { return "{{auth}}"; } }
注：我的用户表是auth，所以模型是Auth.php
<?php class IndexForm extends CFormModel { public $a_account; public $a_password; public $rememberMe; public $verifyCode; public $_identity; public function rules() { return array( array("verifyCode", "captcha", "allowEmpty" => !CCaptcha::checkRequirements(), "message"=>"请输入正确的验证码"), array("a_account", "required", "message" => "用户名必填"), array("a_password", "required", "message" => "密码必填"), array("a_password", "authenticate"), array("rememberMe", "boolean"), ); } public function authenticate($attribute, $params) { if (!$this->hasErrors()) { $this->_identity = new UserIdentity($this->a_account, $this->a_password); if (!$this->_identity->authenticate()) { $this->addError("a_password", "用户名或密码不存在"); } } } public function login() { if ($this->_identity === null) { $this->_identity = new UserIdentity($this->a_account, $this->a_password); $this->_identity->authenticate(); } if ($this->_identity->errorCode === UserIdentity::ERROR_NONE) { $duration = $this->rememberMe ? 60*60*24*7 : 0; Yii::app()->user->login($this->_identity, $duration); return true; } else { return false; } } public function attributeLabels() { return array( "a_account" => "用户名", "a_password" => "密码", "rememberMe" => "记住登录状态", "verifyCode" => "验证码" ); } }
注：IndexForm也可以写成LoginForm，只是系统内已经有了，我就没有替换它，同时注意看自己用户表的字段，一般是password和username，而我的是a_account和a_password
Controller
<?php class IndexController extends Controller { public function actions() { return array( "captcha" => array( "class" => "CCaptchaAction", "width"=>100, "height"=>50 ) ); } public function actionLogin() { if (Yii::app()->user->id) { echo "<div>欢迎" . Yii::app()->user->id . "，<a href="" . SITE_URL . "admin/index/logout">退出</a></div>"; } else { $model = new IndexForm(); if (isset($_POST["IndexForm"])) { $model->attributes = $_POST["IndexForm"]; if ($model->validate() && $model->login()) { echo "<div>欢迎" . Yii::app()->user->id . "，<a href="" . SITE_URL . "admin/index/logout">退出</a></div>";exit; } } $this->render("login", array("model" => $model)); } } public function actionLogout() { Yii::app()->user->logout(); $this->redirect(SITE_URL . "admin/index/login"); } }
注：第一个方法是添加验证码的
view
<meta http-equiv="content-type" content="text/html;charset=utf-8"> <?php $form = $this->beginWidget("CActiveForm", array( "id"=> "login-form", "enableClientValidation" => true, "clientOptions" => array( "validateOnSubmit" => true ) )); ?> <div class="row"> <?php echo $form->labelEx($model,"a_account"); ?> <?php echo $form->textField($model,"a_account"); ?> <?php echo $form->error($model,"a_account"); ?> </div> <div class="row"> <?php echo $form->labelEx($model,"a_password"); ?> <?php echo $form->passwordField($model,"a_password"); ?> <?php echo $form->error($model,"a_password"); ?> </div> <?php if(CCaptcha::checkRequirements()) { ?> <div class="row"> <?php echo $form->labelEx($model, "verifyCode"); ?> <?php $this->widget("CCaptcha"); ?> <?php echo $form->textField($model, "verifyCode"); ?> <?php echo $form->error($model, "verifyCode"); ?> </div> <?php } ?> <div class="row rememberMe"> <?php echo $form->checkBox($model,"rememberMe"); ?> <?php echo $form->label($model,"rememberMe"); ?> <?php echo $form->error($model,"rememberMe"); ?> </div> <div class="row buttons"> <?php echo CHtml::submitButton("Submit"); ?> </div> <?php $this->endWidget(); ?>
同时修改项目下protected/components下的UserIdentity.php
<?php /** * UserIdentity represents the data needed to identity a user. * It contains the authentication method that checks if the provided * data can identity the user. */ class UserIdentity extends CUserIdentity { /** * Authenticates a user. * The example implementation makes sure if the username and password * are both "demo". * In practical applications, this should be changed to authenticate * against some persistent user identity storage (e.g. database). * @return boolean whether authentication succeeds. */ public function authenticate() { /* $users=array( // username => password "demo"=>"demo", "admin"=>"admin", ); if(!isset($users[$this->username])) $this->errorCode=self::ERROR_USERNAME_INVALID; elseif($users[$this->username]!==$this->password) $this->errorCode=self::ERROR_PASSWORD_INVALID; else $this->errorCode=self::ERROR_NONE; return !$this->errorCode; */ $user_model = Auth::model()->find("a_account=:name",array(":name"=>$this->username)); if($user_model === null){ $this -> errorCode = self::ERROR_USERNAME_INVALID; return false; } else if ($user_model->a_password !== md5($this -> password)){ $this->errorCode=self::ERROR_PASSWORD_INVALID; return false; } else { $this->errorCode=self::ERROR_NONE; return true; } } }