php - 如何在数据库中插入正确的值

Question

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Answer 1

$POST 似乎没有所有信息，我建议您更改帖子结构以将问题与答案联系起来，如下所示:

array(2) { 
            ["numQuestion"]=> array(2) { 
                                        [0]=> string(1) "1" 
                                        [1]=> string(1) "2" 
                                       }
           ["submitDetails"]=> string(14) "Submit Details" 
           ["question_1"] => array(2) {
                                        [0] => string(1) "A"
                                        [1] => string(1) "C"
                                      }
           ["question_2"] => array(2) {
                                        [0] => string(1) "A"
                                        [1] => string(1) "B"
                                        [2] => string(1) "E"
                                      }
        }

现在，如果帖子有那个结构，你可以做这样的事情来插入数据:

$numQuestionArray = $_POST["numQuestion"];

for($i =0; $i < count($numQuestionArray);$i++)
{
    $questionId = $numQuestionArray[$i];

    $questionsql = "INSERT INTO Question (QuestionId) VALUES (?)";

    if (!$insert = $mysqli->prepare($questionsql)) {
      // Handle errors with prepare operation here
    }

    $insert->bind_param("i", $questionId);

    $insert->execute();

    if ($insert->errno) {
      // Handle query error here
    }

    $insert->close();

    $lastID = $mysqli->insert_id;

    $questionAnswerPostStr = "question_".$questionId;

    $answerArray = $_POST[$questionAnswerPostStr];

    for($j =0; $j < count($numQuestionArray);$j++)
    {
        $answer = $numQuestionArray[$j];

        $answersql = "INSERT INTO Answer (QuestionId, Answer) VALUES (?, ?)";

        if (!$insertanswer = $mysqli->prepare($answersql)) {
          // Handle errors with prepare operation here
        }  

        $insertanswer->bind_param("is", $lastID, $answer);

        $insertanswer->execute();

        if ($insertanswer->errno) {
          // Handle query error here
        }

        $insertanswer->close();
    }
}

但是，我仍然认为 question_id 应该在表中自动递增，而不是插入 $POST 值。