php站内消息

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

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

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

// 发送消息
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $sender = $_POST['sender'];
    $receiver = $_POST['receiver'];
    $message = $_POST['message'];

    $sql = "INSERT INTO messages (sender, receiver, message) VALUES ('$sender', '$receiver', '$message')";

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

// 接收消息
$sql = "SELECT * FROM messages WHERE receiver = '$receiver'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "发送者: " . $row["sender"]. " - 消息: " . $row["message"]. "<br>";
    }
} else {
    echo "没有新消息";
}

$conn->close();
?>