How to use PHP functions to implement SMS verification codes and login logs for user registration and login?

How to use PHP functions to implement SMS verification codes and login logs for user registration and login?

With the rapid development of the Internet, more and more websites and applications require user registration and login functions. In order to increase security and convenience, many websites and applications use mobile phone SMS verification codes to verify user identity and record user login logs. This article will introduce how to use PHP functions to implement these functions.

1. Mobile phone SMS verification code

Mobile SMS verification code is a commonly used user identity verification method. It sends a text message containing a verification code to the user's mobile phone, and the user receives the text message. Then enter the verification code to verify. The following is an example of a PHP function that implements a mobile phone SMS verification code.

function sendSMS($phoneNumber, $code) {
    // 调用短信平台的API发送验证码短信
    $apiUrl = 'http://smsapi.example.com/send_sms';
    $postData = array(
        'phone' => $phoneNumber,
        'code' => $code
    );
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $apiUrl);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($postData));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $response = curl_exec($ch);
    curl_close($ch);
    
    return $response;
}

// 生成随机的四位验证码
$code = rand(1000, 9999);

// 发送短信验证码给用户
$phoneNumber = '13800138000';
$response = sendSMS($phoneNumber, $code);

// 处理短信发送结果
if ($response === 'success') {
    echo '验证码已发送至您的手机，请查收。';
} else {
    echo '验证码发送失败，请稍后重试。';
}

In the above code example, the sendSMS function sends the verification code SMS by calling the API of the SMS platform. We can make adjustments based on the specific SMS platform.

2. Login log

In order to increase the security of user login and track user operations, we usually record the user's login log, including login time, IP address, login status and other information. Below is an example of a PHP function that implements login logging.

function writeLoginLog($userId, $loginStatus) {
    $logFile = 'login.log';
    $loginTime = date('Y-m-d H:i:s');
    $ipAddress = $_SERVER['REMOTE_ADDR'];
    
    $logMessage = "{$loginTime}    {$userId}    {$ipAddress}    {$loginStatus}
";
    
    file_put_contents($logFile, $logMessage, FILE_APPEND);
}

// 在用户登录验证成功后调用
$userId = 123456;
$loginStatus = 'SUCCESS';
writeLoginLog($userId, $loginStatus);

In the above code example, the writeLoginLog function writes the login log to a file. We can save logs to a database or other storage media according to actual needs.

Summary:

Using PHP functions can easily realize the mobile phone SMS verification code and login log functions for user registration and login. The security of user identity verification can be improved through mobile phone SMS verification codes, while user operations can be tracked through login logs and the security of the website can be increased. Developers can make corresponding adjustments and expansions based on specific needs and usage scenarios.

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