如何将元素存储在 Laravel 数组中的变量中？

我想将“区域”存储在$area变量中$school_info array。使用$area我想要将更多 3 行存储到 3 个不同的数组中，例如：$school_info1, $school_info2, $school_info3.

public function schooldetailviewid($id)
{
    $school_id = $id;
    $school_info = DB::table('school_infos')->where('school_id', '=', $school_id)->get();
    $area = $school_info->area;

    // recomendation start
    $school_info1 = DB::table('school_infos')->where('area', '=', $area)->get();
    $school_info2 = DB::table('school_infos')->where('area', '=', $area)->get();
    $school_info3 = DB::table('school_infos')->where('area', '=', $area)->get();
    // recomendation end

    return view('schooldetail', compact('school_info', 'school_info1', 'school_info2', 'school_info3'));
}

问题：元素存储不起作用，并且未提取另外 3 行！我正在尝试制作一个简单的推荐系统。

错误

此集合实例上不存在异常属性 [area]。