如何在 PHP 中实现防抖和防重复提交的功能

<?php
session_start();

function debounce($callback, $delay = 1000) {
    if(isset($_SESSION['debounce_timer'])) {
        return;
    }

   $callback();

   $_SESSION['debounce_timer'] = time() + $delay;
   reGISter_shutdown_function('debounce_reset_timer');
}

function debounce_reset_timer() {
   unset($_SESSION['debounce_timer']);
}

<?php
function handleInput() {
   // 处理AJAX请求
}

debounce('handleInput', 1000);

<?php
session_start();

function generateToken() {
    $_SESSION['submit_token'] = md5(uniqid(rand(), true));
    return $_SESSION['submit_token'];
}

$token = generateToken();

<input type="hidden" name="submit_token" value="<?php echo $token; ?>">

<?php
session_start();

function validateToken($token) {
    if(isset($_SESSION['submit_token']) && $token === $_SESSION['submit_token']) {
        unset($_SESSION['submit_token']);
        return true;
    }

    return false;
}

if($_POST && validateToken($_POST['submit_token'])) {
    // 处理表单提交逻辑
}