CouponStatus::all PHP Method

    public static function all()
    {
        return [self::STATUS_ACTIVE => Yii::t('CouponModule.coupon', 'Active'), self::STATUS_NOT_ACTIVE => Yii::t('CouponModule.coupon', 'Not active')];
    }

echo Yii::t('CouponModule.coupon', 'are required');
?>
        </div>

        <?php 
echo $form->errorSummary($model);
?>
        <div class="row">
            <div class="col-sm-3">
                <?php 
echo $form->dropDownListGroup($model, 'type', ['widgetOptions' => ['data' => CouponType::all()]]);
?>
            </div>
            <div class="col-sm-3">
                <?php 
echo $form->dropDownListGroup($model, 'status', ['widgetOptions' => ['data' => CouponStatus::all()]]);
?>
            </div>
        </div>

        <div class="row">
            <div class="col-sm-7">
                <?php 
echo $form->textFieldGroup($model, 'name');
?>
            </div>
        </div>
        <div class="row">
            <div class="col-sm-7">
                <?php 
echo $form->textFieldGroup($model, 'code');