Php 如何使用ajax发送2d数组？

我目前正在尝试用ajax发送一个从数据库（sql，phpmyadmin）接收的2d数组

我的ajax函数如下所示：（它是用php生成的）

我的resultQuizGet.php文件如下所示

 $sql = "SELECT `quiz`.question,`quiz`.rightAnswer 
 FROM `quiz` 
 WHERE `quiz`.quizID=:qID";
$stmt = $dbh->prepare($sql);
$stmt->bindParam(":qID", $_POST['quiz']);
$stmt->execute();
$resultsQuiz = $stmt->fetchAll();
echo ...

我现在要做什么来接收2d数组而不是普通字符串

---

我希望msg变量是一个2d数组，它等于$resultsquick

修改php，如下所示，以json格式的字符串形式输出数据：

$sql = "SELECT `quiz`.question,`quiz`.rightAnswer 
 FROM `quiz` 
 WHERE `quiz`.quizID=:qID";
$stmt = $dbh->prepare($sql);
$stmt->bindParam(":qID", $_POST['quiz']);
$stmt->execute();
$resultsQuiz = $stmt->fetchAll();
echo json_encode($resultsQuiz);

然后，修改jQuery，如下所示，将该结构化字符串解析回数组/对象：

$.ajax({
        type: "POST",
        url: "resultQuizGet.php",
        data: "getAnswer="+question, //question is just a int variable
        success: function(msg) {
           // Note: if it's not json, this can cause a problem
           var data = $.parseJSON(msg);
           // output to your console so you can see the structure
           console.log(data);
           // Utilize the data somehow
           $.each(data, function(key, arr) {
               // Arr should contain an object / array representing the rows from your php results
               console.log(arr);
               // If your row has a field titled `question`, you can access it one of two ways:
               alert(arr.question); // Object notation
               alert(arr['question']); // Array notation
           });
        }
 });

---

在php中，如果是数组，则使用

json\u encode

将其作为结构化数组传递给ajax调用。然后，在jQuery中，使用

$.parseJSON（）

将其从json字符串转换为数组。我发现了一些关于json_encode（）和json.stringify（）的信息，但无法使其正常工作。我尝试过这一点，但无法继续了解如何从here@RobinAndersson-见我的修订。你问的很有趣，因为在你的评论出现之前，我正在编辑以显示这一点。。。

$.ajax({
        type: "POST",
        url: "resultQuizGet.php",
        data: "getAnswer="+question, //question is just a int variable
        success: function(msg) {
           // Note: if it's not json, this can cause a problem
           var data = $.parseJSON(msg);
           // output to your console so you can see the structure
           console.log(data);
           // Utilize the data somehow
           $.each(data, function(key, arr) {
               // Arr should contain an object / array representing the rows from your php results
               console.log(arr);
               // If your row has a field titled `question`, you can access it one of two ways:
               alert(arr.question); // Object notation
               alert(arr['question']); // Array notation
           });
        }
 });