How to implement app interface security verification code in php

In recent years, the rapid development of mobile applications (Apps) has brought great changes to people’s lives. As applications continue to evolve, so do the number of cyber security issues encountered today. Many people are concerned about security issues such as passwords, but not everyone is fully aware of the issue of App interface security. This article will introduce to you a commonly used method-using PHP to implement App interface security verification code.

1. What is the App interface security verification code

First, let’s understand what the App interface security verification code is. App interface verification means that when the App requests the server, the server must authenticate and verify the integrity of the client's information to prevent some malicious attacks. The interface security verification code is a verification measure used to verify whether the App request is legal and the interface request is authentic.

2. How to implement the App interface security verification code in Php

The following is an introduction to how Php implements the App interface security verification code:

1. First you need to generate a random string And store it on the server side. This string is the key of the verification code. You can use the following code to generate a random string and set its expiration time:

$key = md5(time() . mt_rand(1, 1000000));
$expire_time = 60 * 10; // 设置过期时间：10分钟
// 将 $key 存储到服务器端；

2. Then when the client needs to send a request, the key of the random string is sent to the server side, and the server side Use this key to verify whether the request is legal. If the request is illegal, execution will be refused. The code is as follows:

$key = $_GET['key'];
// 从服务器端获取 $key 保存的数据；
if(!$key || !isset($key_data[$key])) {
    // key 不存在，说明这个请求不合法，拒绝执行请求；
    exit('请求不合法');
}

3. Next, in order to prevent repeated requests, each key can only be used once on the server side. When the client sends a request, the server returns a token to the client. This token is generated by the mailbox after the key verification is successful. The next request must carry the newly generated token. The server verifies the token and executes the business logic. The code is as follows:

$key = $_GET['key'];
// 从服务器端获取 $key 保存的数据；
if(!$key || !isset($key_data[$key])) {
    // key 不存在，说明这个请求不合法，拒绝执行请求；
    exit('请求不合法');
}

$token = md5($key . time() . mt_rand(1, 1000000));
// 将 $token 和 $key 存储到服务器端；
$result = array(
    'code' => 0,
    'msg' => '',
    'token' => $token,
    'data' => array()
);

// 将 $result 转换为 JSON 格式返回客户端；

4. When the client sends a request again, it must carry the token parameter. If the token carried is consistent with the one stored on the server side, it means that this is a legitimate request, otherwise the execution will be refused. The code is as follows:

$token = $_GET['token'];
// 从服务器端获取存储的 $token 数据；
if(!$token || !isset($token_data[$token])) {
    // token 验证失败，拒绝执行这个请求；
    exit('token 验证失败');
}

3. Summary

App interface security verification code is an important part of App interface verification. Through the above code example, you can see that PHP implements the App interface security verification code by simply verifying the correctness of the key and token while avoiding their reuse. Although this process is simple, it ensures the security of the interface, greatly reduces the probability of the interface being attacked by hackers, and provides users with a better service experience.

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