PHP anti-shake technology: ensure the accuracy and validity of data submitted by users

PHP Anti-Shake Technology: Ensure the accuracy and validity of data submitted by users

With the rapid development of the Internet, the user interactivity of Web applications has become more and more is becoming more and more important. Users often enter data into forms and submit it to the server for processing. However, due to network delays or user misoperations, repeated submissions sometimes occur, affecting the accuracy and validity of the data. In order to solve this problem, PHP anti-shake technology came into being.

PHP anti-shake technology can ensure that the data submitted by the user will only be processed once, thus avoiding problems caused by repeated submissions. The implementation of this technology is relatively simple, and will be introduced in detail below with specific code examples.

The principle of anti-shake technology is to delay the user's submission time. Only when the user stops operating for a certain period of time, the data is actually submitted to the server for processing. In specific implementation, anti-shake processing can be performed on the front end through JavaScript, or anti-shake processing can be performed on the back end through PHP. Here we take back-end PHP anti-shake as an example.

Suppose we have a form that contains username and password fields and need to prevent users from submitting the form repeatedly. First, we need to add a piece of JavaScript code on the front end to achieve the anti-shake effect.

// 防抖函数
function debounce(fn, delay) {
  let timerId;
  
  return function() {
    clearTimeout(timerId);
    
    const that = this;
    const args = arguments;
    
    timerId = setTimeout(function() {
      fn.apply(that, args);
    }, delay);
  };
}

// 表单提交处理函数
function handleSubmit() {
  // 获取表单数据，进行表单验证等操作
  
  // 提交表单数据给服务器进行处理
  // ...
}

// 绑定防抖处理函数至表单提交事件
const form = document.querySelector('#form');
const debouncedSubmit = debounce(handleSubmit, 1000);
form.addEventListener('submit', debouncedSubmit);

In the above code, we use a debounce function to achieve the anti-shake effect. In the form submission event, we bind the form submission processing function handleSubmit to the debounce processing function debouncedSubmit, and set a delay time of 1 second. In this way, when the user submits the form, the form submission processing function will only be triggered after stopping the operation for 1 second.

Next, we also perform corresponding anti-shake processing in the back-end PHP code.

<?php
session_start();

function handleFormSubmit() {
  if (isset($_SESSION['last_submit']) && time() - $_SESSION['last_submit'] < 1) {
    // 忽略重复提交的操作
    return;
  }
  
  // 处理表单提交数据
  // ...
  
  $_SESSION['last_submit'] = time();
}

handleFormSubmit();
?>

In the back-end PHP code, we use the $_SESSION variable to record the time of the last form submission. In the form submission processing function handleFormSubmit, we determine whether it is a repeated submission by judging the difference between the last submission time and the current time. If multiple submissions occur within 1 second, ignore the duplicate submissions and return directly, otherwise continue processing the submission data.

Through the anti-shake processing of front-end JavaScript and the anti-shake processing of back-end PHP, we ensure that the data submitted by the user will only be processed once within a certain period of time, avoiding problems caused by repeated submissions. This can effectively improve user experience and ensure the accuracy and validity of data.

To sum up, PHP anti-shake technology is an important technical means that can ensure the accuracy and validity of data submitted by users. In actual development, we can choose the appropriate anti-shake implementation method according to specific needs, and adjust the anti-shake delay time according to the actual situation. In this way, we can ensure that the data submitted by users is processed correctly and improve the user experience.

The above is the detailed content of PHP anti-shake technology: ensure the accuracy and validity of data submitted by users. For more information, please follow other related articles on the PHP Chinese website!