passing parameter to widget

I create a widget , but I need to pass a parameter to this widget. I need to give channel_id of channel already created to $chn that I use in my widget

my widget is :




<?php

namespace app\components\content\create;


use Yii;

use yii\base\Widget;

use yii\helpers\Html;

use app\models\PostGallery;

use app\models\Permission;

use app\accions\content\AxPostGallery;


class UploadGalleryWidget extends \yii\base\Widget {


    public function run() {

		

		$model = new PostGallery;   $permission = new Permission;   $acc_PGallery = new AxPostGallery;

		

		if ($model->load(Yii::$app->request->post()) )

		{

			$acc_PGallery->CreateGallery($model, $chn);

		}

        return $this->render('/postgallery/_formUploadGallery', [

            'model' => $model,

	    'permission' => $permission,

        ]);

    }

}


?>



My view of form is :




<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>


	<?= $form->field($model_PstGlr, 'PGalleryFile[]')->fileInput(['multiple' => true, 'accept' => 'image/*']) ?>

				

    <?= $form->field($model_PstGlr, 'post_text')->textarea(['rows' => 2]) ?>

	

	<?= $form->field($model_PstGlr, 'permission_id')->dropdownList($model_Permission->PermissionOn()) ?>


    <div class="form-group">

        <?= Html::submitButton('Save', ['class' => 'btn btn-success']) ?>

    </div>


    <?php ActiveForm::end(); ?>



And inside my view of channel I use :




<?= UploadGalleryWidget::widget() ?>



I need to give channel_id of channel already created to $chn that I use in my widget