php生成手机验证码

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

// 发送短信验证码（模拟）
function sendSms($phone, $code) {
    // 这里可以调用第三方短信服务API
    echo "Sending SMS to $phone: Your verification code is $code";
}

// 生成并发送验证码
$phone = '13800138000'; // 用户手机号
$code = generateCode();
sendSms($phone, $code);

// 存储验证码到数据库（示例）
// 假设有一个数据库连接
$db = new PDO('mysql:host=localhost;dbname=test', 'username', 'password');
$stmt = $db->prepare("INSERT INTO verification_codes (phone, code, expires_at) VALUES (:phone, :code, NOW() + INTERVAL 5 MINUTE)");
$stmt->bindParam(':phone', $phone);
$stmt->bindParam(':code', $code);
$stmt->execute();
?>