在 POST 數組中傳遞默認值

Question

我有一個 MCQ 測試問題頁面。 問題和選項由 foreach 循環打印，並以 JSON 格式存儲。 當用戶提交時，我有一個 POST 數組，我在其中存儲為特定問題單擊的單選按鈕。 我已經完成了所有工作，但其中有一個錯誤，即如果用戶留下任何問題，post 數組會因一些未知的索引/值值而受到干擾。 並且正確答案數組中包含所有索引。 所以我無法比較 arrays。 如果沒有索引/鍵，我如何將 0 作為數組中的值放置。

HTML FORN

 <form id="gi" method="post" name="mockForm" 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' required>" ." " , $value['op1']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op2' required>" ." " , $value['op2']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op3' required>"." "  , $value['op3']."</pre>".
          "<pre>"."<input type='radio' name='question" . $value['number']."' value='op4' required>"." " , $value['op4']."</pre>"

              "</p>";
      }
      ?>
            <input class="submitBtn" type="submit" name="btnsubmit" value="SUBMIT">
            <button onclick="hit(); handleClick();">click</button>
       </form>

PHP CHECKANSWER.php

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

$correctAnswerArray = [];

$wrongCount = 0;
$correctCount = 0;
foreach ($JsonData as $key => $value) {
    array_push($correctAnswerArray, $value['correct_answer']);
}

    $userAnswerArray = $_POST;

$breakForeach = count($userAnswerArray) - 1;
$loopRun = 0;
foreach ($userAnswerArray as $key => $answer) {


    $questionNumber = substr($key, -1);

    if ($correctAnswerArray[$questionNumber] === $answer) {
        # increment correct
        $correctCount++;
    } else if($correctAnswerArray[$questionNumber] === 0) {
        # increment wrong
        $wrongCount++;
    }
    else {
        $wrongCount++;
    }


$loopRun++;

    if($breakForeach == $loopRun ) break;
}
echo "<br>".$correctCount."<br>";
echo $wrongCount;

?>

Answer 1

嘆息...請嘗試從中學習一些東西。

<form id="gi" method="post" action="checkAnswer.php">
  <?php foreach ($json_data as $value): ?>
    <p>
        <span class="que">Question</span>
        <?php echo $value["number"]; ?>
    </p>

    <hr class="line">

    <?php 
        for ($i = 1, $i <= 4; $i++) {
            echo sprintf('<input type="radio" name="question[%d] value="%s" required> %s', 
                $value["number"], 
                $value["op{$i}"], 
                $value["op{$i}"]);
        }
    ?>
  <?php endforeach; ?>

<?php
// FIXME Database
$answerKey = json_decode(file_get_contents("example_10.json"), true);

$score = 0;
foreach ($_POST as $i => $answer) {
    if (isset($answerKey[$i]) && $answerKey[$i] == $answer) {
        // increment correct
        $score++;
    }
}

echo "<br>{$score}<br>";
echo count($answerKey) - $score;