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PHPを使用してmySQLデータからオブジェクトのインスタンスの変数を伝播するにはどうすればよいですか? 疑似コードでの私のオブジェクトは次のとおりです。

exam:{
         questions:[
             question:{
                 questionID: string
                 questionTest: string
                 categoryID: string
                 correctAnswerID: string
                 chosenAnswerID: string
                 answers:[
                     answer:{
                         answerID = string
                         answerText = string
                         isTrue = bool
                     }
                     answer:{}
                 ]
             }
             question:{}
         ]
         categoryID: string
     }

対応するクラスは次のとおりです（構文が間違っている可能性が高いです。私はphpが初めてです）：

class ExamClass
{
    // property declaration
    public $questions = 'a default value';
    public $categoryID = 'a default value';
}

class QuestionClass
{
    // property declaration
    public $questionID = 'a default value';
    public $questionTest = 'a default value';
    public $categoryID = 'a default value';
    public $correctAnswerID = 'a default value';
    public $chosenAnswerID = 'a default value';
    public $answers = 'a default value';
}

class AnswersClass
{
    // property declaration
    public $answerID = 'a default value';
    public $answerText = 'a default value';
    public $isTrue = 'a default value';
}

データベースからデータを抽出する php コードは次のとおりです。

<html>
<body>

<?php
    /*

     exam:{
         questions:[
             question:{
                 questionID: string
                 questionTest: string
                 categoryID: string
                 correctAnswerID: string
                 chosenAnswerID: string
                 answers:[
                     answer:{
                         answerID = string
                         answerText = string
                         isTrue = bool
                     }
                     answer:{}
                 ]
             }
             question:{}
         ]
         categoryID: string
     }

     */

    class ExamClass
    {
        // property declaration
        public $questions = 'a default value';
        public $categoryID = 'a default value';
    }

    class QuestionClass
    {
        // property declaration
        public $questionID = 'a default value';
        public $questionTest = 'a default value';
        public $categoryID = 'a default value';
        public $correctAnswerID = 'a default value';
        public $chosenAnswerID = 'a default value';
        public $answers = 'a default value';
    }

    class AnswersClass
    {
        // property declaration
        public $answerID = 'a default value';
        public $answerText = 'a default value';
        public $isTrue = 'a default value';
    }


    header('Content-Type: text/html; charset=utf-8');
    $con=mysqli_connect("localhost","root","root","Theory");
    // Check connection
    if (mysqli_connect_errno())
    {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
    $result = mysqli_query($con,"SELECT `questions`.`questionID` AS questionID,
                           `questions`.`questionText` AS questionText,
                           `questions`.`categoryID` AS categoryID,
                           `answers`.`answerID` AS answerID,
                           `answers`.`answerText` AS answerText,
                           `answers`.`isTrue` AS isTrue
                                 FROM `questions`,`answers`
                                 WHERE `questions`.`questionID` = `answers`.`questionID`
                                 AND `questions`.`categoryID` = 2");

    if (!$result)
    {
        die('Error: ' . mysqli_error($con));
    }

   $rows = array();
   while($r = mysqli_fetch_assoc($result)) {
        $rows[] = $r;
   }
   print json_encode($rows);

    mysqli_close($con);
    ?>

</body>
</head>

現在抽出されているデータは次のようになります。

[
  {
    "questionID": "2",
    "questionText": "question text 2",
    "categoryID": "2",
    "answerID": "1",
    "answerText": "answer text 1",
    "isTrue": "0"
  },
  {
    "questionID": "2",
    "questionText": "question text 2",
    "categoryID": "2",
    "answerID": "2",
    "answerText": "answer text 2",
    "isTrue": "1"
  },
  {
    "questionID": "2",
    "questionText": "question text 2",
    "categoryID": "2",
    "answerID": "3",
    "answerText": "answer text 3",
    "isTrue": "0"
  },
  {
    "questionID": "2",
    "questionText": "question text 2",
    "categoryID": "2",
    "answerID": "4",
    "answerText": "answer text 4",
    "isTrue": "0"
  }
]
4

2 に答える 2

0

これにより、データ ソースをクラスにマップする方法についていくつかのアイデアが得られるはずです。

  class Exam
  {
      // property declaration
      public $questions = array();
      public $categoryID;
  }

  class Question
  {
      // property declaration
      public $questionID;
      public $questionTest;
      public $categoryID;
      public $correctAnswerID;
      public $chosenAnswerID;
      public $answers = array();
  }

  class Answer
  {
      // property declaration
      public $answerID;
      public $answerText;
      public $isTrue;
  }


  class ExamBuilder{
     public function buildExam($data){
        $e = new Exam();
        $e->categoryID = $data->categoryID;
        $this->addQuestions($data->questions, $e);
        return $e;
     }

     protected function addQuestions ($questions, Exam $exam){
        foreach ($questions as $question){
           $q = new Question();
           $q->questionID = $question->questionID;
           $q->questionTest = $question->questionTest;
           $q->categoryID = $question->categoryID;
           $q->correctAnswerID = $question->correctAnswerID;
           $q->chosenAnswerID = $question->chosenAnswerID;
           $this->addAnswers($question->answers, $q);
           $exam->questions[] = $q;
        }
     }

     protected function addAnswer($answer, Question $question){
        $a = new Answer();
        $a->answerID = $a->anwerID;
        $a->answerText = $answer->answerText;
        $a->isTrue = $answer->isTrue;
     }
  }

使用するには

 $builder = new ExamBuilder();
 $exam = $builder->buildExam($data);
于 2013-07-16T19:32:47.163 に答える