在下面的场景中，如何在父数组中创建内部数组

我是PHP中复杂数组的新手。我有一个名为$questions的关联数组，如下所示（供您参考，我只打印这个关联数组的前两个元素，实际数组太大）：

Array
(
    [0] => Array
        (
            [question_id] => 33185
            [question_parent_id] => 0
            [question_subject_id] => 4
            [question_topic_id] => 503
            [question_directions] => 
            [question_text] => Two gases are at 300 K and 350 K respectively Ratio of average kinetic energy of their molecules is
            [question_file] => 
            [question_description] => 
            [question_difficulty_type] => 1
            [question_has_sub_ques] => 0
            [question_picked_individually] => no
            [question_appeared_count] => 0
            [question_manual] => 0
            [question_site_id] => 
            [question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
            [question_added_date] => 1328180210
            [question_updated_staff_id] => 
            [question_updated_date] => 0
        )
    [1] => Array
        (
            [question_id] => 33187
            [question_parent_id] => 0
            [question_subject_id] => 4
            [question_topic_id] => 503
            [question_directions] => 
            [question_text] => what will be the temperature when the rms velocity is double the rms velocity at 300 K
            [question_file] => 
            [question_description] => 
            [question_difficulty_type] => 1
            [question_has_sub_ques] => 0
            [question_picked_individually] => no
            [question_appeared_count] => 0
            [question_manual] => 0
            [question_site_id] => 
            [question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
            [question_added_date] => 1328180274
            [question_updated_staff_id] => 
            [question_updated_date] => 0
        )
)

现在我对这个数组的操作代码如下：

/*Compare each question with all the questions present within an array*/
            foreach ($questions as $outer_data) {
        $outer_question = $outer_data['question_text'];
        foreach ($questions as $inner_data) {
          $inner_question = $inner_data['question_text'];  
            $same_chars = similar_text($outer_question, $inner_question, $percent);
            $percentage = number_format((float)$percent, 2, '.', '');
            if($percentage > 50) {
                //I'm not able to write a perfect code to create an array here, please help me out in writing this code
            }
        }
      }

在上面的代码中，我在遇到问题的地方写了一条评论。实际上，当条件（即$percentage > 50）得到满足时，我想将所有问题ID附加到原始数组$questions。假设对于问题id 33185，以下id具有类似的问题，那么具有question_id值33185的数组元素应该如下所示：

Array
    (
        [0] => Array
            (
                [question_id] => 33185
                [question_parent_id] => 0
                [question_subject_id] => 4
                [question_topic_id] => 503
                [question_directions] => 
                [question_text] => Two gases are at 300 K and 350 K respectively Ratio of average kinetic energy of their molecules is
                [question_file] => 
                [question_description] => 
                [question_difficulty_type] => 1
                [question_has_sub_ques] => 0
                [question_picked_individually] => no
                [question_appeared_count] => 0
                [question_manual] => 0
                [question_site_id] => 
                [question_created_staff_id] => fbfee12504bf3c4a038d4c9f142f894e
                [question_added_date] => 1328180210
                [question_updated_staff_id] => 
                [question_updated_date] => 0
                [similar_questions_ids] => Array
                (
                    [0] => 60905
                    [1] => 60929
                    [2] => 60912
                )

            )
)

现在，我面临着一个问题，那就是为这个期望的输出编写完美的代码。如果我以错误的方式编写了当前代码，您可以将其重新提供，因为我是PHP数组的新手。任何形式的建议都将受到欢迎。有人能在这方面帮我吗？如有任何帮助，我们将不胜感激。