如何在函数中使用 $categoryId

Question

在这里，我在 yii2 GridView

中生成 动态列

$gridColumns = [];
$gridColumns[] = [
    'class' => 'yii\grid\SerialColumn',
    'contentOptions' => ['width' => 10],
];

foreach ($CategoryList as $categoryId => $categoryName) {
    $gridColumns[] = [
        'label' => $categoryName,
        'value' => function($model) {
            return $categoryId;    <---- categoryId use in function
        }
    ];
}


GridView::widget([
    'dataProvider' => $dataProvider,
    'filterModel' => $searchModel,
    'columns' => $gridColumns,
]);

如何在gridView闭包函数中使用categorId

每列都有唯一的 $categoryId，例如 1,2,3 循环

Answer 1

使用匿名函数use()

$gridColumns[] = [
    'label' => $categoryName,
    'value' => function($model) use ($categoryId) {
        return $categoryId;
    }
];

Answer 2

foreach ($CategoryList as $categoryId => $categoryName) {

    $categoryIdVariable = "$categoryId"; <---- store value in a variable
    $$categoryIdVariable = $categoryIdVariable; <---- store variable in another variable


    $gridColumns[] = [
        'label' => $categoryName,
        'value' => function($model) use($categoryIdVariable) { <---- and use it like a string variable

            $categoryId = $categoryIdVariable;
            return $categoryId;    <---- dynamic categoryId use in function
        }
    ];
}

如何在函数中使用 $categoryId

how can use $categoryId in function

gridview

yii2

yii2-advanced-app