array(5) {
  [0]=>
  array(4) {
    ["id"]=>
    string(5) "10001"
    ["class"]=>
    string(6) "一組"
    ["name"]=>
    string(6) "阿部"
    ["test"]=>
    array(3) {
      ["testId"]=>
      string(3) "111"
      ["score"]=>
      string(2) "10"
      [""]=>
      string(0) ""
    }
  }
  [1]=>
  array(4) {
    ["id"]=>
    string(5) "10002"
    ["class"]=>
    string(6) "一組"
    ["name"]=>
    string(6) "伊藤"
    ["test"]=>
    array(3) {
      ["testId"]=>
      string(3) "222"
      ["score"]=>
      string(2) "20"
      [""]=>
      string(0) ""
    }
  }
  [2]=>
  array(4) {
    ["id"]=>
    string(5) "10003"
    ["class"]=>
    string(6) "二組"
    ["name"]=>
    string(6) "内田"
    ["test"]=>
    array(3) {
      ["testId"]=>
      string(3) "333"
      ["score"]=>
      string(2) "30"
      [""]=>
      string(0) ""
    }
  }
  [3]=>
  array(4) {
    ["id"]=>
    string(5) "10004"
    ["class"]=>
    string(6) "二組"
    ["name"]=>
    string(6) "遠藤"
    ["test"]=>
    array(3) {
      ["testId"]=>
      string(3) "444"
      ["score"]=>
      string(2) "40"
      [""]=>
      string(0) ""
    }
  }
  [4]=>
  array(4) {
    ["id"]=>
    string(5) "10005"
    ["class"]=>
    string(6) "三組"
    ["name"]=>
    string(6) "太田"
    ["test"]=>
    array(3) {
      ["testId"]=>
      string(3) "555"
      ["score"]=>
      string(2) "50"
      [""]=>
      string(0) ""
    }
  }
}