Yii 用户登录验证

http://blog.sina.com.cn/s/blog_685213e70101mo4i.html

1）首先在model文件夹中新建文件 LoginForm.php 代码如下
 <?php

class LoginForm extends CFormModel
{
 public $username;
 public $password;
 public $rememberMe;
 private $_identity;
 
 public function rules()
 {
  return array(
   // username and password are required
   array('username, password', 'required'),
   // rememberMe needs to be a boolean
   array('rememberMe', 'boolean'),
   // password needs to be authenticated
   array('password', 'authenticate'),
  );
 }
 
 public function attributeLabels()
 {
  return array(
   'rememberMe'=>'Remember me next time',
  );
 }
 
 public function authenticate($attribute,$params)
 {
  if(!$this->hasErrors())
  {
   $this->_identity=new UserIdentity($this->username,$this->password);
   if(!$this->_identity->authenticate())
    $this->addError('password','Incorrect username or password.');
  }
 }
 
 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 days
   Yii::app()->user->login($this->_identity,$duration);
   return true;
  }
  else
   return false;
 }
}
 
2）在controller中添加 public function Login 代码如下
 
public function actionLogin() {
        // set the login page layout
        $this->layout = '/layouts/login_page';
        $model = new LoginForm;
        // if it is ajax validation request
        if (isset($_POST['ajax']) && $_POST['ajax'] === 'login-form') {
            echo CActiveForm::validate($model);
            Yii::app()->end();
        }
        // collect user input data
        if (isset($_POST['LoginForm'])) {
            $model->attributes = $_POST['LoginForm'];
            // validate user input and redirect to the previous page if valid
            if ($model->validate()) {
                $user_model = Users::model()->findByAttributes(array('username' => $model->username));
                if ($model->login()) {
                    // Set ip and date attributes to update user record
                    $attributes = array(
                        'last_loginip' => ip2long(Yii::app()->request->userHostAddress),
                        'last_logindate' => date('Y-m-d H:i:s', time()),
                    );

                    $this->redirect('index');
                }
            }
        }
        // display the login form
        $this->render('login', array(
            'model' => $model,
        ));
    }
 
 
3）编辑protected/component/UserIdentity.php文件 代码如下
 
<?php

class UserIdentity extends CUserIdentity {
  
    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;
        $record = Users::model()->findByAttributes(array('username' => $this->username));
        if ($record === null)
            $this->errorCode = self::ERROR_USERNAME_INVALID;
        else if ($record->password !== $this->password)
            $this->errorCode = self::ERROR_PASSWORD_INVALID;
        else {