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Hi there, Today I would like to write a simple tutorial on creating custom Component in Yii2 and I will show you how to use created component in your application.

Here is the simple steps, just follow the step at the end you will have your first custom component.

Step1:

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

Step2:

Crate a file with desired component name inside components folder and copy past the below code.

namespace app\components;
use Yii;
use yii\base\Component;
use yii\base\InvalidConfigException;
class MyComponent extends Component
{
public function welcome()
{
  echo "Welcome to MyComponent";
}
}

Step3:

Add your component inside the config/web.php file

'components' => [
          'mycomponent' => [
            'class' => 'app\components\MyComponent',
             ],
           ]

Step4:

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()
    {
       Yii::$app->mycomponent->welcome();
    }
}

I hope you like this Post, Please feel free to comment below, your suggestion and problems if you face – we are here to solve your problems.

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Posted by Editorial Staff