php - Yii2 custom login is not working -

i new in yii2, right working custom login, did code login when go in home page through index action didn't session there, here code

public function actionindex()     {         $session = yii::$app->session;     if ($session->isactive) {             echo 'sdsd'; die;         }         return $this->render('index');     }      public function actionlogin()     {         if (!\yii::$app->user->isguest) {             return $this->gohome();         }         $model = new user();         //if ($model->load(yii::$app->request->post()) && $model->login()) {         if ($model->load(yii::$app->request->post()) && $model->validate()) {             $username = $_post['user']['username'];             $password = $_post['user']['password'];             $condition = "username = '".$username."' , password = '".md5($password)."' , status = '1' , usertype = '1' ";             $logindata = user::find()->where($condition)->all();             if(count($logindata)>0) {                 $username = $logindata[0]->username;                 $userid = $logindata[0]->userid;                 $session = yii::$app->session;                 $session->set('username',$username);                 $session->set('userid',$userid);                 $this->redirect('index');             } else {                 yii::$app->session->setflash('error', 'username or password incorrect');             }         }         return $this->render('login', [             'model' => $model,         ]);     } 

even after login still consider me guaest user, yii::$app->user->isguest changes need ?

you don't login user in yii app

you don't need set session must assign proper value function

return \yii::$app->getuser()->login($youruser, $yourrememberme ? $this->module->rememberfor : 0); 

see doc user , login