网格视图中2个日期之间的Yii2计数天

use yii\grid\GridView;
use yii\data\ArrayDataProvider;
use yii\i18n\Formatter;
use yii\helpers\VarDumper;

// 假设有一个数据提供者，提供了相关的数据
$dataProvider = new ArrayDataProvider([
    'allModels' => [
        ['id' => 1, 'start_date' => '2022-01-01', 'end_date' => '2022-01-05'],
        ['id' => 2, 'start_date' => '2022-02-10', 'end_date' => '2022-02-15'],
        // 其他数据...
    ],
]);

// 创建网格视图，并设置数据提供者和列
echo GridView::widget([
    'dataProvider' => $dataProvider,
    'columns' => [
        'id',
        'start_date',
        'end_date',
        [
            'label' => '天数差异',
            'value' => function ($model) {
                $startDate = new DateTime($model['start_date']);
                $endDate = new DateTime($model['end_date']);
                $diff = $endDate->diff($startDate)->days;
                return $diff;
            },
        ],
    ],
]);