phpcms评论修改

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "phpcms";

$conn = new mysqli($servername, $username, $password, $dbname);

if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 显示评论
$sql = "SELECT * FROM comments WHERE article_id = 1";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "评论ID: " . $row["id"]. " - 内容: " . $row["content"]. "<br>";
    }
} else {
    echo "没有评论";
}

// 修改评论
if (isset($_POST['edit_comment'])) {
    $comment_id = $_POST['comment_id'];
    $new_content = $_POST['new_content'];

    $sql = "UPDATE comments SET content='$new_content' WHERE id=$comment_id";

    if ($conn->query($sql) === TRUE) {
        echo "评论更新成功";
    } else {
        echo "错误: " . $sql . "<br>" . $conn->error;
    }
}

$conn->close();
?>