php 评论表

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

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

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

// 插入评论
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $content = $_POST['content'];
    $user_id = $_POST['user_id'];
    $post_id = $_POST['post_id'];
    $created_at = date("Y-m-d H:i:s");

    $sql = "INSERT INTO comments (content, user_id, post_id, created_at) VALUES ('$content', '$user_id', '$post_id', '$created_at')";

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

// 查询评论
$sql = "SELECT * FROM comments WHERE post_id = 1";
$result = $conn->query($sql);

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

$conn->close();
?>

$stmt = $conn->prepare("INSERT INTO comments (content, user_id, post_id, created_at) VALUES (?, ?, ?, ?)");
$stmt->bind_param("siss", $content, $user_id, $post_id, $created_at);
$stmt->execute();