为什么我的数组是递增php laravel 5

我有一个数组，其中包含来自数据库的数据：

$responses = FormResponses::where('form_id', '>=', $phoneFirstElement->id)->where('form_id', '<=', $phoneLastElement->id)->get();
$responsesArray = $responses->toArray();

然后我的嵌套循环：

  foreach ($phone as $key => $value2) // Populate Phone Numbers Horizontally
  {
      $sheet->cell($start.'9', $value2->phone);
      // This will fill the responses for each number
      foreach ($metrics as $key => $value)
      {
        $form_id = $value2->id;
        $metrics_id =  $value->id;
        $neededObjects = array_filter(
            $responsesArray,
            function ($e) use ($form_id, $metrics_id) {
                return $e['form_id'] == $form_id && $e['metrics_id'] == $metrics_id;
            }
        );
        var_dump($neededObjects); 
        exit;
        //$responses = FormResponses::where('form_id', '=', $value2->id)->where('metrics_id', '=', $value->id)->get();
        //$sheet->cell($start.$count, $neededObjects[$counter]['response']);
        $sheet->cell('C'.$count, $value->question);
        $sheet->cell('B'.$count, $value->description);
        $sheet->cell('A'.$count, $value->metrics_name);
        $counter++;
        $count++;
        $neededObjects = array();
      }
      $start++;
      $count = 10;
      //$counter = 0;
  }

我的$responsesArray是有很多记录的数据，所以我想使用array_filter提取这些数据以获得我需要的特定数据，并将其存储在中

$neededObjects

然而，当我制作var_dump时，我会得到类似的东西

  array (size=1)
  0 => 
    array (size=7)
      'id' => int 141730
      'form_id' => int 4430
      'metrics_id' => int 1
      'response' => string 'Yes' (length=3)
      'remarks' => string '' (length=0)
      'created_at' => string '2015-11-23 19:30:07' (length=19)
      'updated_at' => string '2015-11-23 19:30:07' (length=19)

然后当中的下一条记录循环时

    array (size=1)
    1 => 
    array (size=7)
      'id' => int 141731
      'form_id' => int 4430
      'metrics_id' => int 2
      'response' => string 'Yes' (length=3)
      'remarks' => string '' (length=0)
      'created_at' => string '2015-11-23 19:30:07' (length=19)
      'updated_at' => string '2015-11-23 19:30:07' (length=19)

我不明白为什么它在增加。第一个是0，然后是1。是的，因为我在嵌套循环中创建了一个array_filter，但我没有向它添加任何有效值，并且数组筛选器会给我一条数据记录，所以我希望它至少是索引0或类似的格式：

array (size=7)
  'id' => int 141731
  'form_id' => int 4430
  'metrics_id' => int 2
  'response' => string 'Yes' (length=3)
  'remarks' => string '' (length=0)
  'created_at' => string '2015-11-23 19:30:07' (length=19)
  'updated_at' => string '2015-11-23 19:30:07' (length=19)