What does the null out of curly bracket mean?

Yii 2.0 REST APIs
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my controller code :

<?php 

namespace app\controllers;

use Yii;
use yii\rest\ActiveController;
use yii\web\Response;
use app\models\submodels\SubPresensi;
use yii\filters\VerbFilter;

class PresensiApiController extends ActiveController
{
    public $modelClass = 'app\models\submodels\Presensi';

    public function behaviors() {
	    $behaviors = parent::behaviors();
		$behaviors['contentNegotiator']['formats']['text/html'] = Response::FORMAT_JSON;
        // remove authentication filter
        $auth = $behaviors['authenticator'];
        unset($behaviors['authenticator']);
            
        // add CORS filter
        $behaviors['corsFilter'] = [
            'class' => \yii\filters\Cors::className(),
        ];
            
        // re-add authentication filter
        $behaviors['authenticator'] = $auth;
        // avoid authentication on CORS-pre-flight requests (HTTP OPTIONS method)
        $behaviors['authenticator']['except'] = ['options'];
		
        return $behaviors;
        // return [
        //     'verbs' => ['class' => VerbFilter::className(),
        //     'actions' => [
        //         'index'=>['get'],
        //         'view'=>['get'],
        //         'create'=>['post'],
        //         'update'=>['post'],
        //         'delete' => ['delete'],
        //         'deleteall'=>['post'],
        //     ],
              
        //     ]
        // ], $behaviors;
	}

    private function setHeader($status) {
          
          $status_header = 'HTTP/1.1 ' . $status . ' ' . $this->_getStatusCodeMessage($status);
          $content_type="application/json; charset=utf-8";
        
          header($status_header);
          header('Content-type: ' . $content_type);
          header('X-Powered-By: ' . "Presensi Telkom Polban");
      }
      private function _getStatusCodeMessage($status) {
          $codes = Array(
          200 => 'OK',
          400 => 'Bad Request',
          401 => 'Unauthorized',
          402 => 'Payment Required',
          403 => 'Forbidden',
          404 => 'Not Found',
          500 => 'Internal Server Error',
          501 => 'Not Implemented',
          );
          return (isset($codes[$status])) ? $codes[$status] : '';
          // return $codes[$status];
      }

    public function actionCreatePresensi($nim,$idjadwalmatkul) {
        date_default_timezone_set("Asia/Jakarta");
        // $params=$_REQUEST;
        $params = Yii::$app->request->post();  
        $model = new SubPresensi();

        $model->attributes=$params;     
        $model->NIM = $nim;
        $model->Id_Jadwal_Matkul = $idjadwalmatkul;
        $model->Waktu_Presensi = date('Y-m-d H:i:s');
        $model->save();

        if ($model->save()) {   
            // $this->setHeader(200);
            echo json_encode(array('status'=>1,'data'=>array_filter($model->attributes)));
        } 
        else {
            $this->setHeader(400);
            echo json_encode(array('status'=>0,'error_code'=>400,'errors'=>$model->errors),JSON_PRETTY_PRINT);
        }
    }  
}
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image934×575 33 KB

5

Hi @achmaddrf, welcome to the forum.

You should not echo the output in the action method. You have to return it.

        if ($model->save()) {   
            // $this->setHeader(200);
            return json_encode(array('status'=>1,'data'=>array_filter($model->attributes)));
        }

BTW, please use the code tags (</> button on the editor’s header) to show your code.

6

thankyou, iam thankful.
i’m sorry for my bad.