render("example",[ 
            'message' => $message 
         ]); 
      } 
   } 
?>

'defaultRoute' => 'main'

 'basic', 
      'basePath' => dirname(__DIR__), 
      'bootstrap' => ['log'], 
      'components' => [ 
         'request' => [ 
            // !!! insert a secret key in the following (if it is empty) - this is
               //required by cookie validation 
            'cookieValidationKey' => 'ymoaYrebZHa8gURuolioHGlK8fLXCKjO', 
         ], 
         'cache' => [ 
            'class' => 'yii\caching\FileCache', 
         ], 
         'user' => [ 
            'identityClass' => 'app\models\User', 
            'enableAutoLogin' => true, 
         ], 
         'errorHandler' => [ 
            'errorAction' => 'site/error', 
         ], 
         'mailer' => [ 
            'class' => 'yii\swiftmailer\Mailer', 
            // send all mails to a file by default. You have to set 
            // 'useFileTransport' to false and configure a transport 
            // for the mailer to send real emails. 
            'useFileTransport' => true, 
         ], 
         'log' => [ 
            'traceLevel' => YII_DEBUG ? 3 : 0, 
            'targets' => [ 
               [ 
                  'class' => 'yii\log\FileTarget',
                  'levels' => ['error', 'warning'], 
               ], 
            ], 
         ], 
         'db' => require(__DIR__ . '/db.php'), 
      ], 
      //changing the default controller 
      'defaultRoute' => 'example', 
      'params' => $params, 
   ]; 
   if (YII_ENV_DEV) { 
      // configuration adjustments for 'dev' environment 
      $config['bootstrap'][] = 'debug'; 
      $config['modules']['debug'] = [ 
         'class' => 'yii\debug\Module', 
      ]; 
      $config['bootstrap'][] = 'gii'; 
      $config['modules']['gii'] = [ 
         'class' => 'yii\gii\Module', 
      ]; 
   } 
   return $config; 
?>