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php站内信实现

2026-02-27 19:01:03PHP

站内信系统设计

站内信系统通常包含用户发送、接收、查看和管理消息的功能。以下是实现站内信系统的基本步骤和代码示例。

数据库设计

创建必要的表结构存储用户和消息数据。

CREATE TABLE users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    username VARCHAR(50) NOT NULL,
    email VARCHAR(100) NOT NULL
);

CREATE TABLE messages (
    id INT AUTO_INCREMENT PRIMARY KEY,
    sender_id INT NOT NULL,
    receiver_id INT NOT NULL,
    subject VARCHAR(255) NOT NULL,
    content TEXT NOT NULL,
    is_read BOOLEAN DEFAULT FALSE,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (sender_id) REFERENCES users(id),
    FOREIGN KEY (receiver_id) REFERENCES users(id)
);

发送站内信

使用PHP处理表单提交并将消息存入数据库。

<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
    $sender_id = $_POST['sender_id'];
    $receiver_id = $_POST['receiver_id'];
    $subject = $_POST['subject'];
    $content = $_POST['content'];

    $stmt = $pdo->prepare("INSERT INTO messages (sender_id, receiver_id, subject, content) VALUES (?, ?, ?, ?)");
    $stmt->execute([$sender_id, $receiver_id, $subject, $content]);

    header("Location: messages.php");
    exit;
}
?>

接收站内信

查询数据库获取用户收到的消息。

<?php
$receiver_id = $_SESSION['user_id'];
$stmt = $pdo->prepare("SELECT m.*, u.username as sender_name FROM messages m JOIN users u ON m.sender_id = u.id WHERE m.receiver_id = ? ORDER BY m.created_at DESC");
$stmt->execute([$receiver_id]);
$messages = $stmt->fetchAll(PDO::FETCH_ASSOC);
?>

标记为已读

当用户查看消息时更新为已读状态。

<?php
$message_id = $_GET['id'];
$stmt = $pdo->prepare("UPDATE messages SET is_read = TRUE WHERE id = ?");
$stmt->execute([$message_id]);
?>

前端展示

使用HTML和CSS展示消息列表和详情。

php站内信实现

<div class="message-list">
    <?php foreach ($messages as $message): ?>
        <div class="message <?= $message['is_read'] ? 'read' : 'unread' ?>">
            <h3><?= htmlspecialchars($message['subject']) ?></h3>
            <p>From: <?= htmlspecialchars($message['sender_name']) ?></p>
            <p><?= nl2br(htmlspecialchars($message['content'])) ?></p>
            <small><?= $message['created_at'] ?></small>
        </div>
    <?php endforeach; ?>
</div>