php生成短信验证码

<?php
// 生成随机验证码
function generateCaptcha($length = 6) {
    $characters = '0123456789';
    $captcha = '';
    for ($i = 0; $i < $length; $i++) {
        $captcha .= $characters[rand(0, strlen($characters) - 1)];
    }
    return $captcha;
}

// 发送短信验证码（假设使用某个短信服务API）
function sendSms($phone, $captcha) {
    // 这里替换为实际的短信服务API调用代码
    $apiUrl = 'https://api.example.com/sms';
    $apiKey = 'your_api_key';
    $data = [
        'phone' => $phone,
        'message' => "您的验证码是：$captcha，请在5分钟内使用。",
        'apiKey' => $apiKey
    ];
    $options = [
        'http' => [
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
            'method'  => 'POST',
            'content' => http_build_query($data),
        ],
    ];
    $context  = stream_context_create($options);
    $result = file_get_contents($apiUrl, false, $context);
    if ($result === FALSE) { /* 处理错误 */ }
}

// 示例调用
$phone = '13800138000';
$captcha = generateCaptcha();
sendSms($phone, $captcha);

echo "验证码已发送到手机号：$phone";
?>