yii2——自定义widget

<?php
namespace app\components;

use yii\base\Widget;
use yii\helpers\Html;

class HelloWidget extends Widget{
    public $message;
    
    public function init(){
        parent::init();
        if($this->message===null){
            $this->message= ‘Welcome User‘;
        }else{
            $this->message= ‘Welcome ‘.$this->message;
        }
    }
    
    public function run(){
        return Html::encode($this->message);
    }
}
?>


init() - should contain the widget properties,
run()  - should contain rendering result of the widget

<?php
..........
class SiteController  extends Controller
{
    ...........
    public function actionCreatewidget(){
        return $this->render(‘hellowidget‘);
    }
    ...........
}
?>

<?php
use app\components\HelloWidget;
?>
<?= HelloWidget2::widget([‘message‘ => ‘ Yii2.0‘]) ?>