使用PHP从MariaDB数据创建嵌套JSON

我需要帮助。
我有三张桌子。
1.带有列的post\U表格：id\U post，post\U text。
2.附上带有列的图片：id图片、图片名称、id帖子。
3.带有列的注释表：id\u comment、comment\u text、id\u post

<?php 
$con = mysqli_connect('localhost', 'root', '', 'postingan');

// Check connection
if (mysqli_connect_errno())
  {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }
  else {
    echo "success";
  }

$postinganlist_array  = array();
$postingan_array = array();
$image_array = array();
$comment_array = array();
$fetch_postingan = mysqli_query($mysqli, 
    "SELECT id_post, post_text FROM post_table")
 or die(mysqli_error($mysqli));
while ($row_postingan = mysqli_fetch_assoc($fetch_postingan)){
$postingan_array['id'] = $row_postingan['id_post'];
$postingan_array['text'] = $row_postingan['post_text'];
$postingan_array['image']=array();
$postingan_array['comment']=array();

$fetch_images = mysqli_query($mysqli, "SELECT id_picture, picture_name FROM attach_picture WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($mysqli));
while ($row_image = mysqli_fetch_assoc($fetch_images)) {
    $image_array['id']=$fetch_images['id_picture'];
    $image_array['pict']=$fetch_images['picture_name'];
    array_push($postingan_array['image'], $image_array);
}
$fetch_comments = mysqli_query($mysqli, "SELECT id_comment, comment_text FROM comment_table WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($mysqli));
while ($row_comment = mysqli_fetch_assoc($fetch_comments)) {
    $comment_array['id']=$fetch_comments['id_comment'];
    $comment_array['comment']=$fetch_comments['comment_text'];
    array_push($postingan_array['comment'], $comment_array);
}
array_push($postinganlist_array, $postingan_array);}
$jsonData = json_encode(($postinganlist_array));
echo $jsonData;
?>

第36行：（“选择id\U post，从post\U表格中选择post\U文本”）
第37行：（或die（mysqli_错误（$mysqli））

我的预期结果是

[{
    "id": "1",
    "text": "Good morning all",
    "image": 
    {
        "id": "1",
        "pict": "morning.jpg"
    }
    "comment": [
    {
        "id": "1",
        "comment": "Nice picture"
    }
    {
        "id": "2",
        "comment": "Thank you"
    }
    ]

    "id": "2",
    "text": "This is my new project",
    "image": [
        {
            "id": "2",
            "pict": "splassreen.jpg"
        }
        {
            "id": "3",
            "pict": "main.jpg"
        }
    ]
    "comment": [
        {
            "id": "3",
            "comment": "Great app"
        }
        {
            "id": "4",
            "comment": "Amazing"
        }
    ]
}
]

---

请帮助我解决您使用的

代码中的问题

$con = mysqli_connect('localhost', 'root', '', 'postingan');

$fetch_postingan = mysqli_query($mysqli, "SELECT id_post, post_text FROM post_table") or die(mysqli_error($mysqli));

$fetch_images = mysqli_query($mysqli, "SELECT id_picture, picture_name FROM attach_picture WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($mysqli));

$fetch_comments = mysqli_query($mysqli, "SELECT id_comment, comment_text FROM comment_table WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($mysqli));

mysqli\u查询
使用
连接字符串
。您已经输入了
$mysqli
，它应该是
$con
。您的查询必须如下所示：

$fetch_postingan = mysqli_query($con, "SELECT id_post, post_text FROM post_table") or die(mysqli_error($con));

$fetch_images = mysqli_query($con, "SELECT id_picture, picture_name FROM attach_picture WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($con));

$fetch_comments = mysqli_query($con, "SELECT id_comment, comment_text FROM comment_table WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($con));

它解决了我的问题，但结果是线性的，不像我想要的那样，像这样的成功[{“id”：“1”，“text”：“great view”，“image”：[{“id”：“1”，“pict”：“pict_1”}，{“id”：“2”，“pict”：“pict_2”}]，“comment”：[{“id”：“1”，“comment”：“那太棒了”}，{“id”：“2”，“comment”：“当然，最好的”{“id”：“3”，“comment”：“祝我在那里”}，{“id”：“2”，“text”：“早餐快乐”，“图像”：[]，“评论”：[{“id”：“4”，“评论”：“是的，早餐快乐”}，{“id”：“5”，“评论”：“hehe”}]}，{“id”：“3”，“文本”：“大家晚安”，“图像”：[]，“评论”：[]}]我必须添加什么代码才能使它看起来好看？
$fetch_postingan = mysqli_query($con, "SELECT id_post, post_text FROM post_table") or die(mysqli_error($con));

$fetch_images = mysqli_query($con, "SELECT id_picture, picture_name FROM attach_picture WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($con));

$fetch_comments = mysqli_query($con, "SELECT id_comment, comment_text FROM comment_table WHERE id_post = ".$row_postingan['id_post']."") or die(mysqli_error($con));