Use PHP anti-shake technology to avoid frequent repeated submissions of requests

Use PHP anti-shake technology to avoid frequent and repeated submission of requests

When developing web applications, we often encounter situations where users frequently submit requests repeatedly, such as clicking Submitting buttons multiple times, refreshing the page multiple times, etc. will not only increase the load on the server, but may also lead to repeated insertion or operation of data. In order to solve this problem, we can use PHP's anti-shake technology to avoid frequently submitting requests repeatedly.

The principle of anti-shake technology is to delay the execution of the function. The function will only be executed when it is not triggered again within the specified time interval. In PHP, we can implement anti-shake function by setting a timestamp or counter. The following is a specific example:

// 防抖函数
function debounce($callback, $delay) {
    // 记录上一次触发的时间
    static $lastTime = 0;

    return function() use ($callback, $delay) {
        // 获取当前时间
        $currentTime = microtime(true);

        // 计算时间差
        $diffTime = $currentTime - $lastTime;

        // 判断时间间隔是否小于设定的延迟时间
        if ($diffTime < $delay) {
            // 时间间隔小于延迟时间，不执行函数
            return;
        }

        // 更新上一次触发的时间
        $lastTime = $currentTime;

        // 执行回调函数
        call_user_func_array($callback, func_get_args());
    };
}

// 示例回调函数
function submitForm($data) {
    // 处理表单提交
    // ...
    echo "表单提交成功！";
}

// 创建一个防抖函数
$debounceSubmit = debounce("submitForm", 5000); // 延迟5秒

// 处理表单提交
$debounceSubmit($_POST);

In the above code, we use a debounce function debounce to wrap the callback function submitForm. When the form is submitted, we process it by calling debounceSubmit. This function will determine whether the time interval is less than the set delay time. If it is less than the delay time, the callback function will not be executed; if it is greater than or equal to the delay time, the callback function will be executed.

In this way, even if the user clicks the submit button frequently, the form submission will only be triggered once, and there is a set time interval limit. This can not only ensure the performance of the server, but also avoid repeated insertion of data.

It should be noted that the anti-shake function in the above code is based on time judgment, so if the web page is accessed by multiple users at the same time, time differences may occur. If you need more precise anti-shake processing, you can consider using PHP's lock mechanism or other concurrency control technologies.

Summary:
Using PHP's anti-shake technology can prevent users from frequently submitting requests repeatedly and protect server performance and data consistency. Different delay times can be set according to actual needs to achieve a more flexible anti-shake effect.

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