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Comparison of implementation principles and advantages and disadvantages analysis of PHP anti-shake and anti-duplicate submission
Introduction:
In Web development, anti-shake and anti-duplicate submission are Frequently Asked Questions. When users frequently trigger an event, we hope to be able to control the triggering frequency of the event. The anti-shake mechanism can help us reduce unnecessary requests. On the other hand, preventing users from submitting the same form multiple times is also an important security consideration. This article will introduce the principles of anti-shaking and anti-duplicate submission in PHP, as well as their advantages and disadvantages, and demonstrate specific code examples.
1. The implementation principle of anti-shake
The implementation principle of the anti-shake mechanism is relatively simple. When an event is triggered, by setting a timer, if the event is triggered again within the specified time, the timer will be cleared and the timing will start again. The timer will trigger the event normally only after the event stops firing for a period of time.
The sample code is as follows:
function debounce($callback, $delay) { $timer = null; return function() use ($callback, $delay, &$timer) { if ($timer) { clearTimeout($timer); } $timer = setTimeout($callback, $delay); }; } // 调用示例 $debounceHandler = debounce(function() { // 处理具体逻辑 }, 1000); // 触发事件 $debounceHandler();
Advantages:
Disadvantages:
2. Implementation Principle of Anti-Duplicate Submission
Anti-duplicate submission means prohibiting repeated submission of the same form after the user submits the form. This can be achieved by generating and saving a random token. When a user submits a form for the first time, a unique token is generated and saved in the session. Each time the form is submitted, we will check whether the token exists in the session. If it exists, the form has been submitted.
The sample code is as follows:
function preventDuplicateSubmission($callback) { session_start(); $formToken = 'form_token_' . md5($_SERVER['REQUEST_URI']); if (isset($_POST['token']) && $_POST['token'] === $_SESSION[$formToken]) { echo '请勿重复提交表单'; return; } $token = md5(microtime() . rand(0, 9999)); $_SESSION[$formToken] = $token; $_POST['token'] = $token; $callback(); } // 调用示例 preventDuplicateSubmission(function() { // 处理具体逻辑 });
Advantages:
Disadvantages:
3. Comparison between anti-shake and anti-duplicate submission
Anti-shake and anti-duplication submission are both designed to improve the performance and security of the system, but the applicable scenarios and implementation principles are different.
Applicable scenarios:
Implementation principle:
Advantages and Disadvantages:
Conclusion:
Anti-shake and anti-resubmit are both solutions to common web development problems. In actual development, we have to choose the appropriate method according to the specific scenario. If you need to control the frequency of requests, you can use anti-shake; if you need to ensure the uniqueness of form submission, you can use anti-duplicate submission. Of course, we can also use these two methods combined according to needs to provide better user experience and system security.
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