php 闭包嵌套 变量如何使用？

Question

图中代码涉及到闭包嵌套，除了逐级传递还有什么方法使用$data变量嘛

    $data = Conference::pluck('date','date')
                ->flatten(1)
                ->all();

    return Admin::content(function (Content $content) use ($data) {
        $content->header('会议');
        $content->description('列表');
        $content->row(function (Row $row) use ($data) {
            $row->column(6, function (Column $column) use ($data) {
                $column->append((
                    new Box(
                    $data, $this->grid()
                )));
            });
        });
    });

Answer 1

1. 直接在 return 的最后调用原数据，不用传参

return Admin::content(function (Content $content) {
        $content->header('会议');
        $content->description('列表');
        $content->row(function (Row $row) {
            $row->column(6, function (Column $column) {
                $column->append((
                    new Box(
                    Conference::pluck('date','date')->flatten(1)->all(), $this->grid()
                )));
            });
        });
    });

1. 用 $this->tempData 代替闭包传值

$this->tempContentData = Conference::pluck('date','date')
                ->flatten(1)
                ->all();
return Admin::content(function (Content $content) {
        $content->header('会议');
        $content->description('列表');
        $content->row(function (Row $row) {
            $row->column(6, function (Column $column) {
                $column->append((
                    new Box(
                    $this->tempContentData, $this->grid()
                )));
            });
        });
    });