如何显示更高的值yii2

Question

how to display a higher value, for example, if mass > volume then the mass price appears in gridview, if mass < volume then the volume price appears. I use source code like this but still can't.

    [
        'label' => 'Tarif',
        'format' => 'Currency',
        'value' => function ($model) {
            if ($volume= $model['rate'] * Yii::$app->request->get('TarifCargoSearch')['panjang'] * Yii::$app->request->get('TarifCargoSearch')['lebar'] * Yii::$app->request->get('TarifCargoSearch')['tinggi'] / 4000)
                return $volume;
            else if ($mass= $model['rate'] * Yii::$app->request->get('TarifCargoSearch')['massa'])
                return $mass;
            else if ($volume > $mass)
                return $volume;
            else if ($volume < $mass)
                return $mass;
        }
    ],

Answer 1

[
    'label' => 'Tarif',
    'format' => 'Currency',
    'value' => function ($model) {
        $volume = $model['rate'] * Yii::$app->request->get('TarifCargoSearch')['panjang'] * Yii::$app->request->get('TarifCargoSearch')['lebar'] * Yii::$app->request->get('TarifCargoSearch')['tinggi'] / 4000;
        $mass = $model['rate'] * Yii::$app->request->get('TarifCargoSearch')['massa'];

        return $mass > $volume? $mass : $volume;
    }
],

Check this out and let me know, please make sure that your calculations are correct.

Edited

[
    'label' => 'Tarif',
    'format' => 'Currency',
    'value' => function ($model) {
        // Please note that the $model will be object not an array
        $volume = $model->rate * Yii::$app->request->get('TarifCargoSearch')['panjang'] * Yii::$app->request->get('TarifCargoSearch')['lebar'] * Yii::$app->request->get('TarifCargoSearch')['tinggi'] / 4000;
        $mass = $model->rate * Yii::$app->request->get('TarifCargoSearch')['massa'];

        return $mass > $volume? $mass : $volume;
    }
],

Make sure that your calculations are correct. Reference https://www.yiiframework.com/doc/guide/2.0/en/output-data-widgets