javascript - Post 数组与 Json 数组的比较

Question

我正在开展一个大学项目，其中我正在进行在线 MCQ 考试测试。我创建了一个 json 文件来存储问题的数据。我使用 foreach 循环在 php 文件中打印问题。我被困在一个地方，我有一个选定单选按钮的 POST 数组，而在另一个页面上有一个 JSON 文件中的正确答案数组。我想比较两个数组来计算正确答案和错误答案的数量。我的代码唯一的错误是有人没有选择任何有问题的选项。那么我的 POST 数组将无法完美地进行比较。第二个是 Post 数组的格式为

Array ( [question1] => op3 [question2] => op2 [question3] => op3 [question4] => op1 [question5] => op3 [submit] => SUBMIT )

而 JSON 数组是这样的

 [0] => op1 [1] => op1 [2] => op1 [3] => op1 [4] => op1 ) 

我如何比较这两个不同索引的数组，以便我可以计算错误和正确的数量..

这是我的总代码 HTML

form id="gi" method="post" action="checkAnswer.php">

      <?php
      foreach ($json_data as $key => $value) {
          echo
          "<p><span class='que'> Question</span>&nbsp;&nbsp". $value['number']."&nbsp;&nbsp". "<br><hr class='line'>". $value['question']."<br><br>".
          "<pre>"."<input type='radio'  name='question" . $value['number']."' value='op1'>" ." " , $value['op1']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op2'>" ." " , $value['op2']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op3'>"." "  , $value['op3']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op4'>"." " , $value['op4']."</pre>".
          "</p>";
      }
      ?>
      <input class="submitBtn" type="submit" name="submit" value="SUBMIT">
      <!-- <button onclick="handleClick()">click</button> -->
       </form>

这是 json

[

      {
          "number": 1,
          "question": "Eighteen thousandths, written as a decimal, is:",
          "op1" : 20,
          "op2" : 30,
          "op3" : 59,
          "op4" : 54,
          "correct_answer": "op1"
      },
      {
          "number": 2,
          "question": "Eighteen thousandths, written as a decimal, is:",
          "op1" : 20,
          "op2" : 30,
          "op3" : 59,
          "op4" : 54,
          "correct_answer": "op1"
      },
      {
          "number": 3,
          "question": "Eighteen thousandths, written as a decimal, is:",
          "op1" : 20,
          "op2" : 30,
          "op3" : 59,
          "op4" : 54,
          "correct_answer": "op1"
      }
]

这是我执行常见操作的代码

<?php
$contentOfJsonFile = file_get_contents("example_10.json");
$JsonData = json_decode($contentOfJsonFile, true);

$correctAnswerArray = [];



// Defination of all global variables 
$wrongCount = 1;


// this will push the correct answer from the json to an array

foreach ($JsonData as $key => $value) {
    array_push($correctAnswerArray, $value['correct_answer']);
}

print_r($correctAnswerArray);

// this is printing the post array

$userAnswerArray = $_POST;
print_r($userAnswerArray);



//comparing two arrays 
for ($i = 0; $i <= count($userAnswerArray); $i++) {
    for ($j = 0; $j < count($correctAnswerArray); $j++) {
        if ($correctAnswerArray[$j] != $userAnswerArray[$i])
            $wrongCount++;
        else
            $correctCount++;
    }
}

echo $correctCount;
echo $wrongCount;
?>```

Answer 1

foreach ($userAwnserArray as $key => $answer) {
    # get question number
    $questionNumber = substr($key, -1);
    # get answer of the question in the foreach loop and compare to the correct answer
    if ($correctAnswerArray[$questionNumber] === $answer) {
        # increment correct
        $correctCount++;
    } else {
        # increment wrong
        $wrongCount++;
    }
}

我还没有测试过它，但我认为它会插入你走向正确的方向