Yii2: Validate email after registration

-
Goals:
  1. Verify user email
    1. Deny login for unverified email
    2. Resend verification for expired/lost verification
    3. Verify within certain time frame
  2.  Recover lost password
    1. Recover within certain time frame
    2. Resend recovery for expired/lost recovery
 You may want to read this first.

Part 1: Configuration
  1. Edit config\db.php to point to your DB.
  2. Create table for users and verification token.
    CREATE TABLE `users` (
  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
  `email` varchar(255) NOT NULL,
  `password_hash` varchar(255) NOT NULL,
  `confirmed_at` datetime NOT NULL,
  `registration_ip` varchar(255) NOT NULL,
  `created_at` datetime NOT NULL,
  `updated_at` datetime NOT NULL ON UPDATE CURRENT_TIMESTAMP,
  `last_login_at` datetime NOT NULL,
  `last_login_ip` varchar(255) NOT NULL,
  PRIMARY KEY (`id`),
  KEY `email` (`email`) USING BTREE
);
    CREATE TABLE `token` (
  `uid` bigint unsigned NOT NULL,
  `code` varchar(32) COLLATE utf8_unicode_ci NOT NULL,
  `created_at` datetime NOT NULL,
  `type` smallint NOT NULL,
  PRIMARY KEY (`uid`),
  UNIQUE KEY `token_unique` (`uid`,`code`,`type`)
);
  3. Using Gii, create their models. For Users, generate CRUD too.

  4. In config/web.php:
    1. Change the user identity class
      'components' => [
        'user' => [
            'identityClass' => 'app\models\Users',
            'enableAutoLogin' => false,
           ],
    2. Setup mailer. You can use Gmail for this.    
      'components' => [
        'mailer' => [
           'class' => 'yii\swiftmailer\Mailer',
           'useFileTransport' => false,
           'transport' => [
               'class' => 'Swift_SmtpTransport',
               'host' => 'your_smtp_server',
               'username' => 'your_user_name',
               'password' => 'your_password',
               'port' => '587',  //smtp port
               'encryption' => 'tls',  //connection
           ],
        ],
    3. Use Pretty URLs
      'components' => [
        'urlManager' => [
            'class' => 'yii\web\UrlManager',
            // Hide index.php
            'showScriptName' => false,
            // Use pretty URLs
            'enablePrettyUrl' => true,
            'rules' => [
                'gii' => 'gii',
                'gii/<controller:\w+>' => 'gii/<controller>',
                'gii/<controller:\w+>/<action:\w+>' => 'gii/<controller>/<action>',
            ],
        ],
      Don't forget to create .htaccess file in web root folder:
      RewriteEngine on

# If a directory or a file exists, use the request directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Otherwise forward the request to index.php
RewriteRule . index.php
  5. Modify config/params.php 
    <?php

return [
    'adminEmail' => 'admin@example.com',

    
    /** The time before a confirmation token becomes invalid. */
    'confirmWithin' => 86400, // 24 hours

    /** @var int The time you want the user will be remembered without asking for credentials. */
   'rememberFor' => 1209600, // two weeks
 
    /** @var int The time before a recovery token becomes invalid. */
    'recoverWithin' => 21600, // 6 hours
    
];
  6. Modify model LoginForm (see this first to understand more). 
    <?php

namespace app\models;

use Yii;
use yii\base\Model;

    use yii\helpers\Html;
    

/**
 * LoginForm is the model behind the login form.
 *
 * @property User|null $user This property is read-only.
 *
 */
class LoginForm extends Model
{
    
    public $email;
    
    public $password;
    public $rememberMe = true;

    private $_user = false;


    /**
     * @return array the validation rules.
     */
    public function rules()
    {
        return [
            
                // email and password are both required
            [['email', 'password'], 'required'],
    
            // rememberMe must be a boolean value
            ['rememberMe', 'boolean'],
            // password is validated by validatePassword()
            ['password', 'validatePassword'],
            
                ['email', 'email'],
             'confirmationValidate' => [
                'email',
                function ($attribute) {
                    if ($this->user !== null) {
                        if (!$this->user->getIsConfirmed()) {
                            $this->addError($attribute, 
                                            'You need to confirm your email address. '.Html::a('Click here', ['/users/resend']).' to resend the confirmation email');
                        }
                    }
                }
            ],
    
        ];
    }

    /**
     * Validates the password.
     * This method serves as the inline validation for password.
     *
     * @param string $attribute the attribute currently being validated
     * @param array $params the additional name-value pairs given in the rule
     */
    public function validatePassword($attribute, $params)
    {
        if (!$this->hasErrors()) {
            $user = $this->getUser();

            if (!$user || !$user->validatePassword($this->password)) {
                
                    $this->addError($attribute, 'Incorrect email or password.');
    
            }
        }
    }

    /**
     * Logs in a user using the provided email and password.
     * @return bool whether the user is logged in successfully
     */
    public function login()
    {
        if ($this->validate()) {
            
                $this->user->last_login_at = date("Y-m-d H:i:s");
            $this->user->last_login_ip = \Yii::$app->request->userIP;
            $this->user->save(0);
    
            return Yii::$app->user->login($this->getUser(), $this->rememberMe ? 3600*24*30 : 0);
        }
        return false;
    }

    /**
     * Finds user by [[email]]
     *
     * @return User|null
     */
    public function getUser()
    {
        if ($this->_user === false) {
            
                $this->_user = Users::findByEmail($this->email);
    
        }

        return $this->_user;
    }
}
  7. Create component components/Mailer.php (create new folder components in the root of your application) 




    <?php

namespace app\components;

use Yii;
use app\models\Token;
use app\models\Users;
use yii\base\Component;

class Mailer extends Component
{

    /** @var \yii\mail\BaseMailer Default: `Yii::$app->mailer` */
    public $mailerComponent;

    /** @var string */
    public $viewPath = '@app/views/mail';

    /** @var string */
    protected $welcomeSubject;

    /** @var string|array Default: `Yii::$app->params['adminEmail']` OR `no-reply@example.com` */
    public $sender;

    /** @var string */
    protected $recoverySubject;

    /**
     * Sends an email to a user after registration.
     *
     * @param User  $user
     * @param Token $token
     *
     * @return bool
     */
    public function sendWelcomeMessage(Users $user, Token $token = null)
    {
        return $this->sendMessage(
            $user->email,
            $this->getWelcomeSubject(),
            'welcome',
            ['user' => $user, 'token' => $token]
        );
    }

    /**
     * @param string $to
     * @param string $subject
     * @param string $view
     * @param array  $params
     *
     * @return bool
     */
    protected function sendMessage($to, $subject, $view, $params = [])
    {
        $mailer = $this->mailerComponent === null ? Yii::$app->mailer : Yii::$app->get($this->mailerComponent);
        $mailer->viewPath = $this->viewPath;

        if ($this->sender === null) {
            $this->sender = isset(Yii::$app->params['adminEmail']) ?
                Yii::$app->params['adminEmail']
                : 'no-reply@example.com';
        }

        return $mailer->compose($view, $params)
            ->setTo($to)
            ->setFrom($this->sender)
            ->setSubject($subject)
            ->send();
    }

    /**
     * @return string
     */
    public function getWelcomeSubject()
    {
        if ($this->welcomeSubject == null) {
            $this->setWelcomeSubject('Welcome to '. Yii::$app->name);
        }

        return $this->welcomeSubject;
    }

    /**
     * @param string $welcomeSubject
     */
    public function setWelcomeSubject($welcomeSubject)
    {
        $this->welcomeSubject = $welcomeSubject;
    }
 
    /**
     * Sends an email to a user with recovery link.
     *
     * @param User  $user
     * @param Token $token
     *
     * @return bool
     */
    public function sendRecoveryMessage(Users $user, Token $token)
    {
        return $this->sendMessage(
            $user->email,
            $this->getRecoverySubject(),
            'recovery',
            ['user' => $user, 'token' => $token]
        );
    }

    /**
     * @return string
     */
    public function getRecoverySubject()
    {
        if ($this->recoverySubject == null) {
            $this->setRecoverySubject('Complete password reset on '. Yii::$app->name);
        }

        return $this->recoverySubject;
    }

    /**
     * @param string $recoverySubject
     */
    public function setRecoverySubject($recoverySubject)
    {
        $this->recoverySubject = $recoverySubject;
    }
}
  8. Modify views/layouts/main.php To have Sign Up menu 
    <?php

/* @var $this \yii\web\View */
/* @var $content string */

use app\widgets\Alert;
use yii\helpers\Html;
use yii\bootstrap\Nav;
use yii\bootstrap\NavBar;
use yii\widgets\Breadcrumbs;
use app\assets\AppAsset;

AppAsset::register($this);
?>
<?php $this->beginPage() ?>
<!DOCTYPE html>
<html lang="<?= Yii::$app->language ?>">
<head>
    <meta charset="<?= Yii::$app->charset ?>">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <?= Html::csrfMetaTags() ?>
    <title><?= Html::encode($this->title) ?></title>
    <?php $this->head() ?>
</head>
<body>
<?php $this->beginBody() ?>

<div class="wrap">
    <?php
    
    $navItems=[
    ['label' => 'Home', 'url' => ['/site/index']],
    ['label' => 'Status', 'url' => ['/status/index']],
    ['label' => 'About', 'url' => ['/site/about']],
    ['label' => 'Contact', 'url' => ['/site/contact']]
  ];
  if (Yii::$app->user->isGuest) {
    array_push($navItems,['label' => 'Sign In', 'url' => ['/site/login']],['label' => 'Sign Up', 'url' => ['/users/create']]);
  } else {
    array_push($navItems,['label' => 'Logout (' . Yii::$app->user->identity->email . ')',
     'url' => ['/site/logout'],
     'linkOptions' => ['data-method' => 'post']]
    );
  }
 echo Nav::widget([
    'options' => ['class' => 'navbar-nav navbar-right'],
    'items' => $navItems,
 ]);
    
    ?>

    <div class="container">
        <?= Breadcrumbs::widget([
            'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [],
        ]) ?>
        <?= Alert::widget() ?>
        <?= $content ?>
    </div>
</div>

<footer class="footer">
    <div class="container">
        <p class="pull-left">&copy; My Company <?= date('Y') ?></p>

        <p class="pull-right"><?= Yii::powered() ?></p>
    </div>
</footer>

<?php $this->endBody() ?>
</body>
</html>
<?php $this->endPage() ?>
  9. Modify views/site/login.php to login using email. 
    <?php

/* @var $this yii\web\View */
/* @var $form yii\bootstrap\ActiveForm */
/* @var $model app\models\LoginForm */

use yii\helpers\Html;

    use yii\bootstrap\ActiveForm;
    

$this->title = 'Login';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="site-login">
    <h1><?= Html::encode($this->title) ?></h1>

    <p>Please fill out the following fields to login:</p>

    <?php $form = ActiveForm::begin([
        'id' => 'login-form',
        'layout' => 'horizontal',
        'fieldConfig' => [
            'template' => "{label}\n<div class=\"col-lg-3\">{input}</div>\n<div class=\"col-lg-8\">{error}</div>",
            'labelOptions' => ['class' => 'col-lg-1 control-label'],
        ],
    ]); ?>

        
    <?= $form->field($model, 'email', ['errorOptions' => ['class' => 'help-block' ,'encode' => false]])->textInput(['autofocus' => true]) ?>
    

        <?= $form->field($model, 'password')->passwordInput() ?>

        <?= $form->field($model, 'rememberMe')->checkbox([
            'template' => "<div class=\"col-lg-offset-1 col-lg-3\">{input} {label}</div>\n<div class=\"col-lg-8\">{error}</div>",
        ]) ?>

        <div class="form-group">
            <div class="col-lg-offset-1 col-lg-11">
                <?= Html::submitButton('Login', ['class' => 'btn btn-primary', 'name' => 'login-button']) ?>
                
    <?= Html::a('Forget Password', ['/users/request'], ['class'=>'btn btn-primary']) ?>
    
            </div>
        </div>

    <?php ActiveForm::end(); ?>

    <div class="col-lg-offset-1" style="color:#999;">
        You may login with <strong>admin/admin</strong> or <strong>demo/demo</strong>.<br>
        To modify the email/password, please check out the code <code>app\models\User::$users</code>.
    </div>
</div>
  10. Update view views/users/create.php to register new user 
    <?php

use yii\helpers\Html;

    use yii\widgets\ActiveForm;
    

/* @var $this yii\web\View */
/* @var $model app\models\Users */
/* @var $form ActiveForm */


    $this->title = 'Sign up';
$this->params['breadcrumbs'][] = $this->title;
    
?>

    <div class="row">
    <div class="col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><?= Html::encode($this->title) ?></h3>
            </div>
            <div class="panel-body">
                <?php $form = ActiveForm::begin(); ?>

                <?= $form->field($model, 'email') ?>

                <?= $form->field($model, 'password')->passwordInput() ?>
    
                <?= $form->field($model, 'password_repeat')->passwordInput() ?>

                <?= Html::submitButton('Sign up', ['class' => 'btn btn-success btn-block']) ?>

                <?php ActiveForm::end(); ?>
            </div>
        </div>
        <p class="text-center">
            <?= Html::a('Already registered? Sign in!', ['/site/login']) ?>
        </p>
    </div>
</div>
Part 2: Verifying User
  1. Modify action Create in Users Controller 
         /**
     * Creates a new Users model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new Users();
  
        
    if (!empty(Yii::$app->request->post())) {
  
            if ($model->register(Yii::$app->request->post())) {
                return $this->render('welcome', ['email' => $model->email]);
                Yii::$app->end();
           } else {
               return $this->render('create', [
                   'model' => $model,
               ]);
               Yii::$app->end();
          }
    
        }

        return $this->render('create', [
            'model' => $model,
        ]);
    }
  2. Add these actions in Users Controller 
         /**
     * Confirms user's account. If confirmation was successful logs the user and shows success message. Otherwise
     * shows error message.
     *
     * @param int    $id
     * @param string $code
     *
     * @return string
     * @throws \yii\web\HttpException
     */
    public function actionConfirm($id, $code)
    {
        $user = Users::findOne($id);

        $user->attemptConfirmation($id, $code);

        return $this->redirect(['site/index']);
    }

    /**
     * Displays page where user can request new confirmation token. If resending was successful, displays message.
     *
     * @return string
     * @throws \yii\web\HttpException
     */
    public function actionResend()
    {

        /** @var ResendForm $model */
        $model = new ResendForm;
  
        if (!empty(Yii::$app->request->post())) {
            if ($model->load(\Yii::$app->request->post()) && $model->resend()) {
                return $this->redirect(['site/index']);
                Yii::$app->end();
            }
        }

        return $this->render('resend', [
            'model' => $model,
        ]);
    }
  3. Create model models/ResendForm.php. 
    <?php
namespace app\models;

use app\components\Mailer;
use app\models\Token;
use yii\base\Model;

/**
 * ResendForm gets user email address and if user with given email is registered it sends new confirmation message
 * to him in case he did not validate his email.
 *
 */
class ResendForm extends Model
{
    /**
     * @var string
     */
    public $email;

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            ['email', 'trim'],
            [['email'], 'required'],
            ['email', 'email'],
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'email' => 'Email',
        ];
    }

    /**
     * @inheritdoc
     */
    public function formName()
    {
        return 'resend-form';
    }

    /**
     * Creates new confirmation token and sends it to the user.
     *
     * @return bool
     */
    public function resend()
    {
        if (!$this->validate()) {
            return false;
        }

        $user = Users::find()->where(['email' => $this->email])->one();

        if ($user && !$user->getIsConfirmed()) {
            /** @var Token $token */
   
            $token = new Token;
            $token->uid = $user->id;
            $token->type = Token::TYPE_CONFIRMATION;
   
            $token->save(false);
            $mailer = new Mailer;
            $mailer->sendWelcomeMessage($user, $token);

            \Yii::$app->session->setFlash(
             'info',
             'A message has been sent to your email address. It contains a confirmation link that you must click to complete registration.'
            );

            return true;
        } else {
            \Yii::$app->session->setFlash('danger', 'Email not found');
            return false;
        }

    }
}
  4. Add this alias in Users Controller: 
    use app\models\ResendForm;
  5. Modify model Token 
    <?php

namespace app\models;

use Yii;

    use yii\db\ActiveRecord;
use yii\helpers\Url;
    

/**
 * This is the model class for table "token".
 *
 * @property string $uid
 * @property string $code
 * @property string $created_at
 * @property int $type
 */
class Token extends \yii\db\ActiveRecord
{
    
    const TYPE_CONFIRMATION      = 0;
    
 
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return 'token';
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            
    [['uid', 'code', 'type'], 'required'],
    
            [['uid', 'type'], 'integer'],
            [['created_at'], 'safe'],
            [['code'], 'string', 'max' => 32],
            [['uid', 'code', 'type'], 'unique', 'targetAttribute' => ['uid', 'code', 'type']],
            
    [['uid'], 'exist', 'skipOnError' => true, 'targetClass' => Users::className(), 'targetAttribute' => ['uid' => 'id']],
    
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'uid' => 'Uid',
            'code' => 'Code',
            'created_at' => 'Created At',
            'type' => 'Type',
        ];
    }

    
    /**
* @return \yii\db\ActiveQuery
*/
public function getUsers()
{
    return $this->hasOne(Users::className(), ['id' => 'uid']);
}
 
 /**
 * @return bool Whether token has expired.
*/
public function isExpired()
{
    switch ($this->type) {
        case self::TYPE_CONFIRMATION:
            $expirationTime = Yii::$app->params['confirmWithin'];
            break;
        default:
            throw new \RuntimeException();
    }

    return (strtotime($this->created_at) + $expirationTime) < time();
}

/**
 * @return string
 */
public function getUrl()
{
    switch ($this->type) {
       case self::TYPE_CONFIRMATION:
           $route = '/users/confirm';
           break;
       default:
          throw new \RuntimeException();
   }

   return Url::to([$route, 'id' => $this->uid, 'code' => $this->code], true);
}

public function beforeSave($insert)
{
   if ($insert) {
       static::deleteAll(['uid' => $this->uid, 'type' => $this->type]);
       $this->setAttribute('created_at', date('Y-m-d H:i:s'));
       $this->setAttribute('code', Yii::$app->security->generateRandomString());
   }

   return parent::beforeSave($insert);
}
    

}
  6. Modify model Users 
    <?php

namespace app\models;

use Yii;

    use yii\base\NotSupportedException;
use yii\db\ActiveRecord;
use yii\web\IdentityInterface;
use yii\helpers\Security;
use yii\behaviors\TimestampBehavior;
use yii\db\Expression;
use yii\web\Application as WebApplication;
use yii\helpers\Html;
use app\components\Mailer;
    

/**
 * This is the model class for table "users".
 *
 * @property string $id
 * @property string $email
 * @property string $password_hash
 */

    class Users extends \yii\db\ActiveRecord  implements IdentityInterface
    
{
 
    
    public $password;
public $password_repeat;
    
 
    /**
     * {@inheritdoc}
    */
    public static function tableName()
    {
        return 'users';
    }
 
    
    public function behaviors()
{
    return [
       [
           'class' => TimestampBehavior::className(),
           'createdAtAttribute' => 'created_at',
           'updatedAtAttribute' => 'updated_at',
           'value' => new Expression('NOW()'),
       ],
   ];
}
    

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            
    [['email', 'password_hash'], 'string', 'max' => 255],
['password_hash', 'safe'],
['password', 'string', 'min' => 6],
[['email', 'password'], 'required'],
['email', 'email'],
['email', 'unique'],
['password_repeat', 'compare', 'compareAttribute'=>'password', 'skipOnEmpty' => false, 'message'=>"Passwords do not match" ],
    
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'email' => 'Email',
            
    'password' => 'Password',
'password_repeat' => 'Repeat Password',
    
        ];
    }
 
    
    public static function findIdentity($id)
{
   return static::findOne($id);
}

public static function findIdentityByAccessToken($token, $type = null)
{
   return static::findOne(['access_token' => $token]);
}

public function getId()
{
   return $this->id;
}

public function getAuthKey()
{
   return $this->authKey;
}

public function validateAuthKey($authKey)
{
   return $this->authKey === $authKey;
}
 
/**
* Validates password
*
* @param string $password password to validate
* @return bool if password provided is valid for current user
*/

public function validatePassword($password)
{
    return password_verify($password, $this->password_hash);
}

/**
* Finds user by email
*
* @param  string      $email
* @return static|null
*/

public static function findByEmail($email)
{
   return static::findOne(['email' => $email]);
}
 
public function register($post)
{
   $transaction = $this->getDb()->beginTransaction();
   try {
       $this->load($post);
       if ($this->validate()) {
           if ($this->save()) {
               $token = \Yii::createObject(['class' => Token::className(), 'type' => Token::TYPE_CONFIRMATION]);
               $token->link('users', $this);
               $transaction->commit();
               $mailer = new Mailer;
               $mailer->sendWelcomeMessage($this, isset($token) ? $token : null);
               return true;
           } else {
               $transaction->rollBack();
               return false;
           }
       } else {
           $transaction->rollBack();
           $msg = '';
           return false;
       }
  } catch (\Exception $e) {
       $transaction->rollBack();
       \Yii::warning($e->getMessage());
       throw $e;
  }
}
 
/**
* @return bool Whether the user is confirmed or not.
*/

public function getIsConfirmed()
{
   return $this->confirmed_at != '0000-00-00 00:00:00';
}

/**
 * Attempts user confirmation.
 *
 * @param string $code Confirmation code.
 *
 * @return boolean
 */
 
public function attemptConfirmation($id, $code)
{
    $token = Token::find()->where(['uid' =>$id, 'code' => $code, 'type' => Token::TYPE_CONFIRMATION])->one();
  
    if ($token && !$token->isExpired()) {
       $token->delete();
       if (($success = $this->confirm())) {
            \Yii::$app->user->login($this, Yii::$app->params['rememberFor']);
            $this->last_login_at = date("Y-m-d H:i:s");
            $this->last_login_ip = \Yii::$app->request->userIP;
            $this->save(0);
            $message = 'Thank you, registration is now complete.';
       } else {
            $message = 'Something went wrong and your account has not been confirmed.';
       }
   } else {
        $success = false;
        $message = 'The confirmation link is invalid or expired. Please try '.Html::a('requesting', ['/users/resend']).' a new one.';
   }

   Yii::$app->session->setFlash($success ? 'success' : 'danger', $message);

   return $success;
}

/**
 * Confirms the user by setting 'confirmed_at' field to current time.
 */

public function confirm()
{
    $result = (bool) $this->updateAttributes(['confirmed_at' => date('Y-m-d H:i:s')]);
    return $result;
}

/**
 * Displays page where user can request new confirmation token. If resending was successful, displays message.
 *
 * @return string
 * @throws \yii\web\HttpException
 */

public function actionResend()
{
    /** @var ResendForm $model */
    $model = new ResendForm;
    if ($model->load(\Yii::$app->request->post()) && $model->resend()) {
       Yii::$app->session->setFlash('info', 'A new confirmation link has been sent');
       return $this->redirect(['site/index']);
    }

    return $this->render('resend', [
       'model' => $model,
    ]);
}

public function beforeSave($insert)
{
   if ($insert) {
      $this->setAttribute('registration_ip', \Yii::$app->request->userIP);
   }

   if (!empty($this->password)) {
      $this->setAttribute('password_hash', password_hash($this->password, PASSWORD_DEFAULT));
   }
   return parent::beforeSave($insert);
}
    
}
  7. Create view views/mail/welcome.php 
    <?php

use yii\helpers\Html;

?>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
   Hello,
</p>

<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
 Your account on <?php echo Yii::$app->name; ?> has been created.
</p>

<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
 In order to complete your registration, please click the link below.
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
 <?php echo Html::a(Html::encode($token->url), $token->url); ?>
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
 If you cannot click the link, please try pasting the text into your browser.
</p>

<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
   If you did not make this request you can ignore this email.
</p>
  8. You also need to create layout view for email: views/mail/layouts/html.php 
    <?php $this->beginPage() ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
<head>
    <meta name="viewport" content="width=device-width" />
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <?php $this->head() ?>
</head>
<body bgcolor="#f6f6f6" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; -webkit-font-smoothing: antialiased; -webkit-text-size-adjust: none; width: 100% !important; height: 100%; margin: 0; padding: 0;">
<table class="body-wrap" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; width: 100%; margin: 0; padding: 20px;">
    <tr style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
        <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;"></td>
        <td class="container" bgcolor="#FFFFFF" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto; padding: 0; border: 1px solid #f0f0f0;">
            <div class="content" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; max-width: 600px; display: block; margin: 0 auto; padding: 20px;">
                <table style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; width: 100%; margin: 0; padding: 0;">
                    <tr style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
                        <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
                            <?php $this->beginBody() ?>
                            <?= $content ?>
                            <?php $this->endBody() ?>
                        </td>
                    </tr>
                </table>
            </div>
        </td>
        <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;"></td>
    </tr>
</table>
<table class="footer-wrap" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; width: 100%; clear: both !important; margin: 0; padding: 0;"><tr style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;"><td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;"></td>
    <td class="container" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; display: block !important; max-width: 600px !important; clear: both !important; margin: 0 auto; padding: 0;">
        <div class="content" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; max-width: 600px; display: block; margin: 0 auto; padding: 20px;">
            <table style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; width: 100%; margin: 0; padding: 0;">
                <tr style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
                    <td align="center" style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;">
                        <p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 12px; line-height: 1.6; color: #666; font-weight: normal; margin: 0 0 10px; padding: 0;">
                            © <?= Yii::$app->name ?> <?= date('Y') ?>.
                        </p>
                    </td>
                </tr>
            </table>
        </div>
    </td>
    <td style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 100%; line-height: 1.6; margin: 0; padding: 0;"></td>
    </tr>
</table>
</body>
</html>
<?php $this->endPage() ?>
  9. Create view views/users/resend.php 
    <?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;


$this->title = 'Request new confirmation message';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="row">
    <div class="col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><?php echo Html::encode($this->title) ?></h3>
            </div>
            <div class="panel-body">
                <?php $form = ActiveForm::begin([
                    'id' => 'resend-form',
                    'enableAjaxValidation' => false,
                    'enableClientValidation' => true,
                ]); ?>

                <?php echo $form->field($model, 'email')->textInput(['autofocus' => true]); ?>

                <?php echo Html::submitButton('Continue', ['class' => 'btn btn-primary btn-block']); ?><br>

                <?php ActiveForm::end(); ?>
            </div>
        </div>
    </div>
</div>
  10. Create view views/users/welcome.php 
    <?php

use yii\bootstrap\Alert;

$this->title = 'Welcome';
$this->params['breadcrumbs'][] = $this->title;            
?>
<div class="row">
 <div class="col-xs-12">
  Your account has been created and a message with further instructions has been sent to <?php echo $email; ?>.
 </div>
</div>
By now you should be able to verify user's email in your Yii app. Give it a try!

Part 3: Recover Lost Password
  1. Create model models/RecoveryForm.php. 
    <?php

namespace app\models;

use app\components\Mailer;
use yii\base\Model;

/**
 * Model for collecting data on password recovery.
 *
 * @author Dmitry Erofeev <dmeroff@gmail.com>
 */
class RecoveryForm extends Model
{
    const SCENARIO_REQUEST = 'request';
    const SCENARIO_RESET = 'reset';

    /**
     * @var string
     */
    public $email;

    /**
     * @var string
     */
    public $password;
    public $password_repeat;

    /**
     * @var Mailer
     */
    protected $mailer;

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
        return [
            'email'    => 'Email',
            'password' => 'Password',
            'password_repeat' => 'Repeat Password',
        ];
    }

    /**
     * @inheritdoc
     */
    public function scenarios()
    {
        return [
            self::SCENARIO_REQUEST => ['email'],
            self::SCENARIO_RESET => ['password', 'password_repeat'],
        ];
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            ['email', 'trim'],
            ['email', 'required'],
            ['email', 'email'],
            ['password', 'required'],
            ['password', 'string', 'min' => 6],
            ['password_repeat', 'compare', 'compareAttribute'=>'password', 'skipOnEmpty' => false, 'message'=>"Passwords do not match"],
        ];
    }

    /**
     * Sends recovery message.
     *
     * @return bool
     */
    public function sendRecoveryMessage()
    {
        if (!$this->validate()) {
            return false;
        }

        $user = Users::find()->where(['email' => $this->email])->one();

        if ($user) {
            /** @var Token $token */
            $token = new Token;
            $token->uid = $user->id;
            $token->type = Token::TYPE_RECOVERY;
            $token->save(false);

            $mailer = new Mailer;

            if (!$mailer->sendRecoveryMessage($user, $token)) {
                return false;
            }
            \Yii::$app->session->setFlash(
                'info',
                'An email has been sent with instructions for resetting your password'
            );

            return true;
        } else {
            \Yii::$app->session->setFlash('danger', 'Email not found');
            return false;
        }
    }

    /**
     * Resets user's password.
     *
     * @param Token $token
     *
     * @return bool
     */
    public function resetPassword(Token $token)
    {
        if (!$this->validate() || $token->users === null) {
            return false;
        }

        if ($token->users->resetPassword($this->password)) {
            \Yii::$app->session->setFlash('success', 'Your password has been changed successfully.');
            $token->delete();
        } else {
            \Yii::$app->session->setFlash(
                'danger',
                'An error occurred and your password has not been changed. Please try again later.'
            );
        }

        return true;
    }

    /**
     * @inheritdoc
     */
    public function formName()
    {
        return 'recovery-form';
    }
}
  2. Add this alias in Users Controller: 
    use app\models\RecoveryForm;
  3. Add these actions in Users Controller 
         /**
     * Shows page where user can request password recovery.
     *
     * @return string
     */
    public function actionRequest()
    {

        /** @var RecoveryForm $model */
        $model = new RecoveryForm;
        $model->scenario = RecoveryForm::SCENARIO_REQUEST;

        if (!empty(Yii::$app->request->post())) {
            if ($model->load(\Yii::$app->request->post()) && $model->sendRecoveryMessage()) {
                return $this->redirect(['site/index']);
                Yii::$app->end();
            }
        }

        return $this->render('request', [
            'model' => $model,
        ]);
    }

    /**
     * Displays page where user can reset password.
     *
     * @param int    $id
     * @param string $code
     *
     * @return string
     * @throws \yii\web\NotFoundHttpException
     */
    public function actionReset($id, $code)
    {

        /** @var Token $token */
        $token = Token::find()->where(['uid' => $id, 'code' => $code, 'type' => Token::TYPE_RECOVERY])->one();
        if (!$token || $token->isExpired()) {
            \Yii::$app->session->setFlash(
                'danger',
               'Recovery link is invalid or expired. Please try '.Html::a('requesting', ['/users/request']).' a new one.'
            );
            return $this->redirect(['site/login']);
            Yii::$app->end();
        }

        /** @var RecoveryForm $model */
        $model = new RecoveryForm;
        $model->scenario = RecoveryForm::SCENARIO_RESET;

        if (!empty(Yii::$app->request->post())) {
            if ($model->load(\Yii::$app->getRequest()->post()) && $model->resetPassword($token)) {
                \Yii::$app->session->setFlash(
                    'success',
                    'Password has been changed'
                );
                return $this->redirect(['site/login']);
                Yii::$app->end();
           }
        }

        return $this->render('reset', [
            'model' => $model,
        ]);
    }
  4. Add this alias in Users Controller: 
    use yii\helpers\Html;
  5. Modify model Token 
    <?php

namespace app\models;

use Yii;
use yii\db\ActiveRecord;
use yii\helpers\Url;

/**
 * This is the model class for table "token".
 *
 * @property string $uid
 * @property string $code
 * @property string $created_at
 * @property int $type
 */
class Token extends \yii\db\ActiveRecord
{
    const TYPE_CONFIRMATION      = 0;
    
    const TYPE_RECOVERY          = 1;
    
 
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return 'token';
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['uid', 'code', 'type'], 'required'],
            [['uid', 'type'], 'integer'],
            [['created_at'], 'safe'],
            [['code'], 'string', 'max' => 32],
            [['uid', 'code', 'type'], 'unique', 'targetAttribute' => ['uid', 'code', 'type']],
            [['uid'], 'exist', 'skipOnError' => true, 'targetClass' => Users::className(), 'targetAttribute' => ['uid' => 'id']],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'uid' => 'Uid',
            'code' => 'Code',
            'created_at' => 'Created At',
            'type' => 'Type',
        ];
    }

    /**
     * @return \yii\db\ActiveQuery
     */
    public function getUsers()
    {
        return $this->hasOne(Users::className(), ['id' => 'uid']);
    }
 
    /**
     * @return bool Whether token has expired.
     */
    public function isExpired()
    {
        switch ($this->type) {
            case self::TYPE_CONFIRMATION:
                $expirationTime = Yii::$app->params['confirmWithin'];
                break;
            
    case self::TYPE_RECOVERY:
    $expirationTime = Yii::$app->params['recoverWithin'];
    break;
    
            default:
                throw new \RuntimeException();
        }

        return (strtotime($this->created_at) + $expirationTime) < time();
    }

    /**
     * @return string
     */
    public function getUrl()
    {
        switch ($this->type) {
            case self::TYPE_CONFIRMATION:
                $route = '/users/confirm';
                break;
            case self::TYPE_RECOVERY:
                $route = '/users/reset';
                break;
            default:
                throw new \RuntimeException();
        }

        return Url::to([$route, 'id' => $this->uid, 'code' => $this->code], true);
    }

 public function beforeSave($insert)
    {
        if ($insert) {
            static::deleteAll(['uid' => $this->uid, 'type' => $this->type]);
            $this->setAttribute('created_at', date('Y-m-d H:i:s'));
            $this->setAttribute('code', Yii::$app->security->generateRandomString());
        }

        return parent::beforeSave($insert);
    }

}
  6. Add this alias in Users Controller: 
    use app\models\Token;
  7. Modify model Users 
    <?php

namespace app\models;

use Yii;
use yii\base\NotSupportedException;
use yii\db\ActiveRecord;
use yii\web\IdentityInterface;
use yii\helpers\Security;
use yii\behaviors\TimestampBehavior;
use yii\db\Expression;
use yii\web\Application as WebApplication;
use yii\helpers\Html;
use app\components\Mailer;

/**
 * This is the model class for table "users".
 *
 * @property string $id
 * @property string $email
 * @property string $password_hash
 */
class Users extends \yii\db\ActiveRecord  implements IdentityInterface
{
 
 public $password;
 public $password_repeat;
 
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return 'users';
    }
 
    public function behaviors()
    {
     return [
      [
       'class' => TimestampBehavior::className(),
       'createdAtAttribute' => 'created_at',
       'updatedAtAttribute' => 'updated_at',
       'value' => new Expression('NOW()'),
      ],
     ];
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['email', 'password_hash'], 'string', 'max' => 255],
            ['password_hash', 'safe'],
   ['password', 'string', 'min' => 6],
   [['email', 'password'], 'required'],
   ['email', 'email'],
   ['email', 'unique'],
   ['password_repeat', 'compare', 'compareAttribute'=>'password', 'skipOnEmpty' => false, 'message'=>"Passwords do not match" ],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'email' => 'Email',
            'password' => 'Password',
   'password_repeat' => 'Repeat Password',
        ];
    }
 
 public static function findIdentity($id)
    {
        return static::findOne($id);
    }

    public static function findIdentityByAccessToken($token, $type = null)
    {
        return static::findOne(['access_token' => $token]);
    }

    public function getId()
    {
        return $this->id;
    }

    public function getAuthKey()
    {
        return $this->authKey;
    }

    public function validateAuthKey($authKey)
    {
        return $this->authKey === $authKey;
    }
 
 /**
     * Validates password
     *
     * @param string $password password to validate
     * @return bool if password provided is valid for current user
     */

    public function validatePassword($password)
    {
        return password_verify($password, $this->password_hash);
    }

 /**
     * Finds user by email
     *
     * @param  string      $email
     * @return static|null
     */
    public static function findByEmail($email)
    {
        return static::findOne(['email' => $email]);
    }
 
 public function register($post)
    {
  $transaction = $this->getDb()->beginTransaction();
  
  try {
   $this->load($post);
   if ($this->validate()) {
    if ($this->save()) {
     $token = \Yii::createObject(['class' => Token::className(), 'type' => Token::TYPE_CONFIRMATION]);
     $token->link('users', $this);
     $transaction->commit();
     $mailer = new Mailer;
     $mailer->sendWelcomeMessage($this, isset($token) ? $token : null);
     return true;
    } else {
     $transaction->rollBack();
     return false;
    }
   } else {
    $transaction->rollBack();
    $msg = '';
    return false;
   }
        } catch (\Exception $e) {
            $transaction->rollBack();
            \Yii::warning($e->getMessage());
            throw $e;
        }
    }
 
    /**
     * @return bool Whether the user is confirmed or not.
     */
    public function getIsConfirmed()
    {
        return $this->confirmed_at != '0000-00-00 00:00:00';
    }

    /**
     * Attempts user confirmation.
     *
     * @param string $code Confirmation code.
     *
     * @return boolean
     */
    public function attemptConfirmation($id, $code)
    {
        $token = Token::find()->where(['uid' =>$id, 'code' => $code, 'type' => Token::TYPE_CONFIRMATION])->one();
  
        if ($token && !$token->isExpired()) {
            $token->delete();
            if (($success = $this->confirm())) {
                \Yii::$app->user->login($this, Yii::$app->params['rememberFor']);
    $this->last_login_at = date("Y-m-d H:i:s");
    $this->last_login_ip = \Yii::$app->request->userIP;
    $this->save(0);
                $message = 'Thank you, registration is now complete.';
            } else {
                $message = 'Something went wrong and your account has not been confirmed.';
            }
        } else {
            $success = false;
            $message = 'The confirmation link is invalid or expired. Please try '.Html::a('requesting', ['/users/resend']).' a new one.';
        }

        Yii::$app->session->setFlash($success ? 'success' : 'danger', $message);

        return $success;
    }

    /**
     * Confirms the user by setting 'confirmed_at' field to current time.
     */
    public function confirm()
    {
        $result = (bool) $this->updateAttributes(['confirmed_at' => date('Y-m-d H:i:s')]);
        return $result;
    }

    /**
     * Displays page where user can request new confirmation token. If resending was successful, displays message.
     *
     * @return string
     * @throws \yii\web\HttpException
     */
    public function actionResend()
    {
        /** @var ResendForm $model */
        $model = new ResendForm;
        if ($model->load(\Yii::$app->request->post()) && $model->resend()) {
   
           Yii::$app->session->setFlash('info', 'A new confirmation link has been sent');
           return $this->redirect(['site/index']);
        }

        return $this->render('resend', [
            'model' => $model,
        ]);
    }

    
    /**
 * Resets password.
 *
 * @param string $password
 *
 * @return bool
 */
public function resetPassword($password)
{
   return (bool)$this->updateAttributes(['password_hash' => password_hash($password, PASSWORD_DEFAULT)]);
}
    

    public function beforeSave($insert)
    {
        if ($insert) {
            $this->setAttribute('registration_ip', \Yii::$app->request->userIP);
        }

        if (!empty($this->password)) {
            $this->setAttribute('password_hash', password_hash($this->password, PASSWORD_DEFAULT));
        }

        return parent::beforeSave($insert);
    }

}
  8. Create view views/mail/recovery.php 
    <?php

use yii\helpers\Html;

?>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
    Hello
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
    We have received a request to reset the password for your account on <?php echo Yii::$app->name; ?>
    Please click the link below to complete your password reset
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
    <?php echo Html::a(Html::encode($token->url), $token->url); ?>
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
    If you cannot click the link, please try pasting the text into your browser.
</p>
<p style="font-family: 'Helvetica Neue', 'Helvetica', Helvetica, Arial, sans-serif; font-size: 14px; line-height: 1.6; font-weight: normal; margin: 0 0 10px; padding: 0;">
    If you did not make this request you can ignore this email'.
</p>
  9. Create view views/users/request.php 
    <?php

use yii\helpers\Html;
use yii\widgets\ActiveForm;


$this->title = 'Recover your password';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="row">
    <div class="col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><?= Html::encode($this->title) ?></h3>
            </div>
            <div class="panel-body">
                <?php $form = ActiveForm::begin([
                    'id' => 'password-recovery-form',
                    'enableAjaxValidation' => false,
                    'enableClientValidation' => true,
                ]); ?>

                <?= $form->field($model, 'email')->textInput(['autofocus' => true]) ?>

                <?= Html::submitButton('Continue', ['class' => 'btn btn-primary btn-block']) ?><br>

                <?php ActiveForm::end(); ?>
            </div>
        </div>
    </div>
</div>
  10. Create view views/users/reset.php 
    <?php
use yii\helpers\Html;
use yii\widgets\ActiveForm;

$this->title = 'Reset your password';
$this->params['breadcrumbs'][] = $this->title;
?>
<div class="row">
    <div class="col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h3 class="panel-title"><?= Html::encode($this->title) ?></h3>
            </div>
            <div class="panel-body">
                <?php $form = ActiveForm::begin(); ?>

                <?= $form->field($model, 'password')->passwordInput() ?>
    
                <?= $form->field($model, 'password_repeat')->passwordInput() ?>

                <?= Html::submitButton('Finish', ['class' => 'btn btn-success btn-block']) ?><br>

                <?php ActiveForm::end(); ?>
            </div>
        </div>
    </div>
</div>
Credit:
https://www.cloudways.com/blog/user-authentication-yii2/
https://github.com/dektrium

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