Sharing methods for optimizing the display of online people in Discuz

Share the method of optimizing the display of the number of people online in Discuz

Discuz is a commonly used forum program. By optimizing the display of the number of people online, the user experience and the overall website can be improved. performance. This article will share some methods to optimize the display of online people and provide specific code examples for your reference.

1. Utilize caching

In Discuz's online number display, it is usually necessary to frequently query the database to obtain the latest online number data, which will increase the burden on the database and affect the performance of the website. In order to solve this problem, we can use cache to store online number data and reduce the frequency of access to the database.

Specifically, we can set a cache time interval to regularly update the online number data and store it in the cache. In this way, the online number data is obtained directly from the cache when the page is loaded, avoiding frequent access to the database. The following is a sample code:

// 设置在线人数缓存时间间隔为1分钟
$interval = 60;

// 检查缓存是否存在，并且是否过期
if (!($online_data = cache_get('online_data')) || TIMESTAMP - $online_data['last_update'] > $interval) {
    // 查询数据库获取最新的在线人数数据
    $online_count = DB::result_first("SELECT COUNT(*) FROM " . DB::table('common_session'));
    
    // 存储在线人数数据到缓存
    cache_set('online_data', array('online_count' => $online_count, 'last_update' => TIMESTAMP), $interval);
    
} else {
    // 直接从缓存中获取在线人数数据
    $online_count = $online_data['online_count'];
}

// 显示在线人数
echo "在线人数：" . $online_count;

Through the above code example, we have implemented the logic of using cache to optimize the display of online people, reducing the frequency of access to the database and improving website performance.

2. Asynchronously update the number of people online

Another way to optimize the display of the number of people online is to update the data of the number of people online asynchronously, without affecting the loading speed and user experience of the page. The specific operation is to use JavaScript to initiate an Ajax request to obtain the latest online number data and update it to the page.

The following is a simple JavaScript code example:

// 发起异步请求获取在线人数数据
function updateOnlineCount() {
    $.ajax({
        url: 'get_online_count.php',
        success: function(data) {
            $('#online_count').text(data);
        }
    });
}

// 每隔30秒更新一次在线人数
setInterval(updateOnlineCount, 30000);

In the above code, we use the asynchronous request method on the front end to regularly update the online number of people data and display it on the page, which improves Real-time performance and user experience of online number display.

Conclusion

Through the optimization of the above two methods, we can effectively improve the online number display effect of Discuz, reduce the access pressure on the database, and improve the overall performance and user experience of the website. I hope the methods shared in this article will be helpful to you. Welcome to try and optimize the online number display function of your website.

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