PHP开发的商城活动消息推送功能设计思路

<?php

// 连接数据库
$connection = mysqli_connect("localhost", "username", "password", "database");

if (!$connection) {
    die("数据库连接失败: " . mysqli_connect_error());
}

// 添加新的活动消息
function addActivityMessage($title, $content, $time) {
    global $connection;
    
    $query = "INSERT INTO activity_messages (title, content, time, status) VALUES ('$title', '$content', '$time', 'published')";
    
    if (mysqli_query($connection, $query)) {
        echo "活动消息添加成功！";
    } else {
        echo "活动消息添加失败：" . mysqli_error($connection);
    }
}

// 修改已有活动消息
function updateActivityMessage($id, $title, $content, $time) {
    global $connection;
    
    $query = "UPDATE activity_messages SET title='$title', content='$content', time='$time' WHERE id=$id";
    
    if (mysqli_query($connection, $query)) {
        echo "活动消息修改成功！";
    } else {
        echo "活动消息修改失败：" . mysqli_error($connection);
    }
}

// 删除已有活动消息
function deleteActivityMessage($id) {
    global $connection;
    
    $query = "DELETE FROM activity_messages WHERE id=$id";
    
    if (mysqli_query($connection, $query)) {
        echo "活动消息删除成功！";
    } else {
        echo "活动消息删除失败：" . mysqli_error($connection);
    }
}

// 查看已发布的活动消息列表
function getActivityMessages() {
    global $connection;
    
    $query = "SELECT * FROM activity_messages WHERE status='published' ORDER BY time DESC";
    $result = mysqli_query($connection, $query);
    
    if (mysqli_num_rows($result) > 0) {
        while ($row = mysqli_fetch_assoc($result)) {
            echo "标题：" . $row["title"] . "<br>";
            echo "内容：" . $row["content"] . "<br>";
            echo "发布时间：" . $row["time"] . "<br><br>";
        }
    } else {
        echo "没有已发布的活动消息。";
    }
}

// 使用示例
// 添加新的活动消息
addActivityMessage("暑期大促销", "7月1日-7月15日期间，所有商品均有低至5折的优惠！", "2021-06-30");

// 修改已有活动消息
updateActivityMessage(1, "国庆特惠", "10月1日-10月7日期间，所有商品额外享受8折优惠！", "2021-09-30");

// 删除已有活动消息
deleteActivityMessage(1);

// 查看已发布的活动消息列表
getActivityMessages();

// 关闭数据库连接
mysqli_close($connection);

?>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
    function getLatestActivityMessage() {
        $.ajax({
            url: "get_latest_activity_message.php",
            success: function(response) {
                $("#latest-activity-message").html(response);
            }
        });
    }
    
    setInterval(getLatestActivityMessage, 5000);
</script>

<div id="latest-activity-message"></div>

<?php

// 连接数据库
$connection = mysqli_connect("localhost", "username", "password", "database");

if (!$connection) {
    die("数据库连接失败: " . mysqli_connect_error());
}

// 获取最新的活动消息
$query = "SELECT content FROM activity_messages WHERE status='published' ORDER BY time DESC LIMIT 1";
$result = mysqli_query($connection, $query);

if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        echo $row["content"];
    }
} else {
    echo "暂无最新的活动消息。";
}

// 关闭数据库连接
mysqli_close($connection);

?>