Component in yii 2

Step1:Make a folder named “components” in your project root folder.

write your custom component inside components folder eg:MyComponent.php

namespace app\components;

use Yii;
use yii\base\Component;
use yii\base\InvalidConfigException;

class MyComponent extends Component
public function welcome()
echo “Hello..Welcome to MyComponent”;


Step3:Add your component inside the config/web.php file


‘components’ => [

‘mycomponent’ => [

‘class’ => ‘app\components\MyComponent’,


You are done!. Now you can use your component method “welcome” inside any of your app controller actions. eg:controllers/TestController.php

namespace app\controllers;
use Yii;

class TestController extends \yii\web\Controller
public function actionWelcome()

or use it in view



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