PHP 및 XML을 사용하여 사용자 의견 및 메시지 처리 및 표시

<?xml version="1.0" encoding="UTF-8"?>
<comments>
    <comment>
        <user>John Doe</user>
        <content>This is a comment.</content>
        <timestamp>2021-01-01 12:00:00</timestamp>
    </comment>
   <comment>
        <user>Jane Smith</user>
        <content>This is another comment.</content>
        <timestamp>2021-01-02 09:30:00</timestamp>
    </comment>
   <!-- 更多的评论和留言可以在此添加 -->
</comments>

<?php
   $xml = simplexml_load_file("comments.xml");
   
   // 遍历每个评论
   foreach ($xml->comment as $comment) {
       $user = $comment->user;
       $content = $comment->content;
       $timestamp = $comment->timestamp;
       
       // 在这里可以对每条评论进行处理，如输出到页面或保存到数据库
       echo "<div>";
       echo "<p>{$user}: {$content}</p>";
       echo "<small>{$timestamp}</small>";
       echo "</div>";
   }
?>

<form method="POST" action="add_comment.php">
    <label for="user">用户名：</label>
    <input type="text" name="user" id="user" required>
    <br>
    <label for="content">评论内容：</label>
    <textarea name="content" id="content" required></textarea>
    <br>
    <input type="submit" value="提交评论">
</form>

<?php
// 获取用户提交的评论内容
$user = $_POST["user"];
$content = $_POST["content"];
$timestamp = date("Y-m-d H:i:s"); // 获取当前的日期和时间

// 创建一个新的comment元素
$newComment = new SimpleXMLElement("<comment></comment>");
$newComment->addChild("user", $user);
$newComment->addChild("content", $content);
$newComment->addChild("timestamp", $timestamp);

// 加载原始的XML文件
$xml = simplexml_load_file("comments.xml");

// 将新的评论添加到XML文件中
$xml->addChild("comment", $newComment);

// 将更新后的XML保存回文件
$xml->asXML("comments.xml");

// 返回到评论显示页面或做其他处理
header("Location: comments.php");
?>