在php中验证recaptcha

<?php
// 验证reCAPTCHA响应
function verifyRecaptcha($response) {
    $secretKey = 'YOUR_RECAPTCHA_SECRET_KEY';
    $url = 'https://www.google.com/recaptcha/api/siteverify';
    
    $data = array(
        'secret' => $secretKey,
        'response' => $response
    );
    
    $options = array(
        'http' => array(
            'header' => "Content-type: application/x-www-form-urlencoded\r\n",
            'method' => 'POST',
            'content' => http_build_query($data)
        )
    );
    
    $context = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    
    if ($result === false) {
        // 验证请求失败
        return false;
    }
    
    $responseJson = json_decode($result);
    
    return $responseJson->success;
}

// 获取用户提交的reCAPTCHA响应
$response = $_POST['g-recaptcha-response'];

// 验证reCAPTCHA响应
if (verifyRecaptcha($response)) {
    // 验证通过，执行相应的操作
    echo "reCAPTCHA验证通过";
} else {
    // 验证失败，显示错误信息或执行其他操作
    echo "reCAPTCHA验证失败";
}
?>