如何在PHP中實現用戶註冊時發送手機簡訊驗證碼

function generateVerificationCode() {
    $code = '';
    for ($i = 0; $i < 6; $i++) {
        $code .= rand(0, 9);
    }
    return $code;
}

function sendVerificationCode($phone, $code) {
    $apikey = 'your_api_key'; // 替换为真实的API密钥
    $text = "【YourAppName】您的验证码是" . $code . "，有效期为5分钟，请勿泄露给他人。";
    $url = 'https://sms.yunpian.com/v2/sms/single_send.json';

    $data = [
        'apikey' => $apikey,
        'mobile' => $phone,
        'text' => $text,
    ];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    $result = curl_exec($ch);
    curl_close($ch);

    return $result;
}

function registerUser($phone) {
    $verificationCode = generateVerificationCode();
    saveVerificationCodeToDatabase($phone, $verificationCode); // 将验证码保存到数据库中

    $sendResult = sendVerificationCode($phone, $verificationCode); // 发送短信验证码

    if ($sendResult == 'success') {
        echo '短信验证码发送成功，请注意查收短信。';
    } else {
        echo '短信验证码发送失败，请稍后重试。';
    }
}