PHP anti-shake technology: effectively prevent repeated submissions

PHP anti-shake technology: effectively prevent repeated submissions, specific code examples are needed

In web development, we often encounter the problem of repeated submissions by users. This kind of This situation can lead to adverse effects such as repeated operations and data anomalies. In order to solve this problem, we can use PHP anti-shake technology to effectively prevent repeated submissions. This article will introduce the principles of anti-shake technology and give specific PHP code examples.

1. Principle of anti-shake technology

The principle of anti-shake technology is very simple: when an event continues to trigger, we can only execute the processing function once within a certain time interval, thereby avoiding Repeat process. For form submission, we can set a waiting time and disable the submit button during the waiting time to prevent users from submitting repeatedly.

2. Code example using PHP anti-shake technology

The following is a code example using PHP anti-shake technology:

// 防抖函数
function debounce($fn, $delay) {
    $timer = null;
    return function () use ($fn, $delay, &$timer) {
        if ($timer !== null) {
            clearTimeout($timer);
        }
        $timer = setTimeout($fn, $delay);
    };
}

// 表单提交处理函数
function handleSubmit() {
    // 处理表单提交逻辑
    // ...

    // 完成提交后，重新启用提交按钮
    echo "<script>document.getElementById('submitBtn').removeAttribute('disabled');</script>";
}

// 处理表单提交的函数
$debouncedHandleSubmit = debounce('handleSubmit', 3000);

// 表单的HTML代码
echo '<form action="process.php" method="POST">';
echo '   <input type="text" name="username" placeholder="请输入用户名" required>';
echo '   <input type="password" name="password" placeholder="请输入密码" required>';
echo '   <button id="submitBtn" type="button" onclick="handleDebouncedSubmit()">提交</button>';
echo '</form>';

// 防抖处理函数的JavaScript代码
echo '<script>';
echo '   function handleDebouncedSubmit() {';
echo '       document.getElementById("submitBtn").setAttribute("disabled", "disabled");';
echo '       var form = document.querySelector("form");';
echo '       var formData = new FormData(form);';
echo '       var xhr = new XMLHttpRequest();';
echo '       xhr.open("POST", "process.php");';
echo '       xhr.send(formData);';
echo '   }';
echo '</script>';

In the above code, we first define A debounce anti-shake function, which accepts a processing function $fn and a waiting time $delay as parameters. Then, we define the form submission processing function handleSubmit. Next, we used the debounce function to create an anti-shake processing function $debouncedHandleSubmit, and set a waiting time of 3 seconds (ie 3000 milliseconds).

In the HTML part, we created a form and called the anti-shake processing function handleDebouncedSubmit in the onclick event of the submit button. In this function, we first disable the submit button, and then use JavaScript's XMLHttpRequest object to send a POST request to the process.php page to submit the form. Finally, after the form submission is complete, we re-enable the submit button via JavaScript code.

Through the above code example, after the user clicks the submit button, we will disable the submit button within 3 seconds to prevent the user from submitting repeatedly. In this way, we can effectively prevent duplicate submission problems.

Conclusion

PHP anti-shake technology can effectively prevent users from repeatedly submitting, ensuring the accuracy and security of data. By executing the processing function only once within a certain time interval, we can avoid the adverse effects caused by repeated operations by the user. In actual web development, we can flexibly use PHP anti-shake technology according to specific needs to achieve a better user experience.

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