Usage scenario analysis of PHP anti-shake and anti-duplicate submission technology

Usage scenario analysis and code examples of PHP anti-shake and anti-duplicate submission technology

When developing websites or applications, anti-shake and anti-duplicate submission are common requirements, they aim to improve user experience and ensure data security. This article will analyze the usage scenarios of these two technologies and provide specific PHP code examples.

1. Analysis of usage scenarios of anti-shake technology

The goal of anti-shake technology is to limit the number of times users frequently trigger an operation. It is usually used in the following situations:

1. Button click: When users frequently click buttons, anti-shake technology can be used to delay processing to ensure that only one operation is performed.
2. Search box input: When the user continuously enters keywords, anti-shake technology can be used to delay the search operation to improve search efficiency.
3. Page scrolling: When users scroll pages frequently, anti-shake technology can be used to delay loading of data and reduce server pressure.

The following is a simple PHP code example to achieve the effect of button anti-shake:

<?php
session_start();

function debounce($seconds, $callback) {
  $key = 'debounce_' . md5($callback);
  
  if (!isset($_SESSION[$key])) {
    $_SESSION[$key] = time();
    $callback();
  } else {
    if (time() - $_SESSION[$key] >= $seconds) {
      $_SESSION[$key] = time();
      $callback();
    }
  }
}

// 示例：按钮点击事件
function handleClick() {
  echo '按钮被点击了！';
}

// 使用防抖技术处理按钮点击事件
debounce(1, 'handleClick');
?>

In the above example, use the debounce() function to debounce the button Click event for anti-shake processing. Each time the button is clicked, the time interval from the last click will be checked. If it exceeds 1 second, the callback function handleClick() will be executed, otherwise it will not be executed.

2. Analysis of usage scenarios of anti-duplicate submission technology

The goal of anti-duplicate submission technology is to prevent users from repeatedly submitting the same data. Common usage scenarios include:

1. Form submission: When the user submits the form, use anti-duplicate submission technology to avoid inserting the same data repeatedly.
2. Order payment: When the user clicks the payment button, use anti-duplicate submission technology to avoid repeated deductions.
3. Resource upload: When users upload the same file multiple times, use anti-duplicate submission technology to avoid repeated storage.

The following is a simple PHP code example to achieve the effect of preventing repeated submission of the form:

<?php
session_start();

function preventResubmission($token, $callback) {
  $key = 'submission_' . $token;

  if (!isset($_SESSION[$key])) {
    $_SESSION[$key] = true;
    $callback();
  }
}

// 示例：表单提交事件
function handleSubmit() {
  // 处理表单提交的逻辑
  echo '表单已提交！';
}

// 生成表单提交令牌
$token = md5(time());

// 使用防重复提交技术处理表单提交事件
preventResubmission($token, 'handleSubmit');
?>

In the above example, use the preventResubmission() function to The form submission event is processed to prevent repeated submission. First generate a unique form submission token and then call the preventResubmission() function with that token as a parameter. Inside the function, the token will be stored in the session. If the token already exists, the callback function handleSubmit() will not be executed to avoid repeated submission of form data.

Summary:

Anti-shake and anti-repetitive submission are common website and application development needs. The reasonable use of these two technologies can improve user experience and ensure data security. This article analyzes the usage scenarios of anti-shake and anti-resubmission technology and provides specific PHP code examples. I hope it will be helpful to readers. In practical applications, developers can flexibly use anti-shake and anti-duplicate submission technologies based on specific needs and business logic.

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