Detailed explanation of steps to send SMS verification code using PHP

With the development of mobile Internet, SMS verification codes have become a common user authentication method. Whether it is registration, login, password retrieval, etc., SMS verification codes play an important role. As one of the mainstream programming languages ​​​​for Internet development, PHP can also implement the function of sending SMS verification codes by calling the API of the SMS provider. This article will introduce in detail the steps for sending SMS verification codes in PHP.

1. Select an SMS provider

Before using PHP to send SMS verification codes, we need to choose an SMS provider. Common SMS providers include Alibaba Cloud, Tencent Cloud, CEFC, etc. These SMS providers provide complete API interfaces and documents, which can easily implement the function of sending SMS verification codes.

2. Obtain the API key

Before using the SMS provider’s API, we need to obtain the API key first. Taking Alibaba Cloud as an example, we need to create signatures and templates in Alibaba Cloud SMS Service and obtain AccessKey ID and AccessKey Secret. This information will be used for authentication when calling the API interface.

3. Write PHP code

After obtaining the API key, we need to use PHP to call the API interface of the SMS provider to implement the function of sending SMS verification codes. The following is a sample code that uses Alibaba Cloud API to send SMS verification codes:

<?php
// 加载 SDK
require_once "./vendor/autoload.php";
// 初始化配置信息
$accessKeyId = "<your-access-key-id>";
$accessKeySecret = "<your-access-key-secret>";
$signName = "<your-sign-name>";
$templateCode = "<your-template-code>";
$phoneNumbers = "<your-phone-number>";
// 生成验证码
$code = rand(100000, 999999);
// 存储验证码
// TODO
// 发送短信验证码
$sendSms = new AlibabaCloudClientAlibabaCloud();
$sendSms->accessKeyClient($accessKeyId, $accessKeySecret)
    ->regionId('cn-hangzhou')
    ->asDefaultClient();
$result = AlibabaCloud::rpc()
    ->product('Dysmsapi')
    ->scheme('https')
    ->version('2017-05-25')
    ->action('SendSms')
    ->method('POST')
    ->host('dysmsapi.aliyuncs.com')
    ->options([
        'query' => [
            'RegionId' => "cn-hangzhou",
            'PhoneNumbers' => $phoneNumbers,
            'SignName' => $signName,
            'TemplateCode' => $templateCode,
            'TemplateParam' => json_encode(['code' => $code], JSON_UNESCAPED_UNICODE),
        ],
    ])
    ->request();
// 判断短信是否发送成功
if ($result->toArray()['Code'] === 'OK') {
    echo '短信发送成功';
} else {
    echo '短信发送失败';
}
?>

The code uses the SDK of Alibaba Cloud SMS Service and passes in relevant parameters. Before performing the operation of sending SMS verification code, we also need to generate and store the verification code. Verification codes can be generated using the rand() function and then stored in Redis or a database.

4. Optimize the efficiency of sending SMS verification codes

Sending SMS verification codes requires a certain amount of time and resources. In order to improve the efficiency of sending SMS verification codes, we can use PHP multi-process or queue to Send SMS verification code asynchronously. In an actual production environment, we can also limit and monitor SMS sending to prevent malicious attacks and single-machine performance problems.

Summary

This article introduces the steps of using PHP to send SMS verification codes, including selecting SMS providers, obtaining API keys, writing PHP code and optimizing efficiency. Using SMS verification codes can improve the user's security level and user experience, but attention must also be paid to ensuring user privacy and data security during the SMS sending process.

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