PHP ソーシャル メディア アプリケーションのコメントおよび返信機能の分析

CREATE TABLE `posts` (
  `id` INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  `title` VARCHAR(255) NOT NULL,
  `content` TEXT NOT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)

CREATE TABLE `comments` (
  `id` INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  `post_id` INT(11) UNSIGNED NOT NULL,
  `parent_id` INT(11) UNSIGNED DEFAULT 0,
  `content` TEXT NOT NULL,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  `updated_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
)

<?php

// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 获取帖子ID
$postID = $_GET["postID"];

// 查询指定帖子的评论列表
$query = "SELECT * FROM comments WHERE post_id = " . $postID;
$result = mysqli_query($conn, $query);

// 将查询结果转换为数组
$comments = [];
while($row = mysqli_fetch_assoc($result)) {
    $comments[] = $row;
}

// 返回评论列表
echo json_encode($comments);
?>

<?php

// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 获取帖子ID和评论内容
$postID = $_POST["postID"];
$content = $_POST["content"];

// 执行插入操作，将评论保存到数据库中
$query = "INSERT INTO comments (post_id, content) VALUES (" . $postID . ", '" . $content . "')";
$result = mysqli_query($conn, $query);

// 返回操作结果
if ($result) {
    echo "评论添加成功";
} else {
    echo "评论添加失败";
}
?>

<?php

// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 获取评论ID和回复内容
$commentID = $_POST["commentID"];
$content = $_POST["content"];

// 执行插入操作，将回复保存到数据库中
$query = "INSERT INTO comments (post_id, parent_id, content) VALUES (0, " . $commentID . ", '" . $content . "')";
$result = mysqli_query($conn, $query);

// 返回操作结果
if ($result) {
    echo "回复添加成功";
} else {
    echo "回复添加失败";
}
?>

// 获取帖子评论列表
function getComments(postID) {
    $.ajax({
        url: "get_comments.php?postID=" + postID,
        success: function(response) {
            // 处理评论列表数据
            var comments = JSON.parse(response);
            // 渲染评论列表界面
            // ...
        },
        error: function() {
            // 处理错误
        }
    });
}

// 添加评论
function addComment(postID, content) {
    $.ajax({
        url: "add_comment.php",
        method: "POST",
        data: {postID: postID, content: content},
        success: function(response) {
            // 处理添加评论的操作结果
        },
        error: function() {
            // 处理错误
        }
    });
}

// 添加回复
function addReply(commentID, content) {
    $.ajax({
        url: "add_reply.php",
        method: "POST",
        data: {commentID: commentID, content: content},
        success: function(response) {
            // 处理添加回复的操作结果
        },
        error: function() {
            // 处理错误
        }
    });
}