php – 如何验证Google Recaptcha V3响应

发布时间：2020-12-13 13:08:04 所属栏目：PHP教程来源：网络整理

导读：如何在客户端和服务器端(php)中集成Google reCAPTCHA版本3.以下代码用于显示recaptcha,但它不能正常工作.如何进行这种集成. htmlhead script src='https://www.google.com/recaptcha/api.js?render=6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD'/script/head

如何在客户端和服务器端(php)中集成Google reCAPTCHA版本3.以下代码用于显示recaptcha,但它不能正常工作.如何进行这种集成.

<html>

<head>
  <script src='https://www.google.com/recaptcha/api.js?render=6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD'></script>
</head>

<body>
  <script>
    grecaptcha.ready(function() {
      grecaptcha.execute('6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD',{
        action: 'action_name'
      });
    });
  </script>

  <form action="verify.php" method="post">
    <input type="text" name="name" placeholder="Your name" required>
    <input type="email" name="email" placeholder="Your email address" required>
    <textarea name="message" placeholder="Type your message here...." required></textarea>

    <input type="submit" name="submit" value="SUBMIT">

  </form>

</body>

</html>

Verify.php

<?php

    if(isset($_POST['g-recaptcha-response']) && !empty($_POST['g-recaptcha-response'])) {
        //your site secret key
        $secret = '6Le7-FkUAAAAAAJq065QqoXNvqJrtmlezcmvFMxHD';
        //get verify response data
        $verifyResponse = file_get_contents('https://www.google.com/recaptcha/api/siteverify?secret='.$secret.'&response='.$_POST['g-recaptcha-response']);
        $responseData = json_decode($verifyResponse);
        if($responseData->success):

             print_r("Working Fine"); exit;
        else:
             print_r("No valid Key"); exit;
        endif;
    } else {
        print_r("Not Working Captcha"); exit;
    }

?>

<html>
    <head>
        <script src='https://www.google.com/recaptcha/api.js?render=6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD'></script>
    </head>
    <body> 
    <script>
    // when form is submit
    $('form').submit(function() { 
        // we stoped it
        event.preventDefault();
        // needs for recaptacha ready
        grecaptcha.ready(function() {
            // do request for recaptcha token
            // response is promise with passed token
            grecaptcha.execute('6Le7-FkUAAAAADDSsTVBvpoUB5MkesNKgPVemFf-UD',{action: 'create_comment'}).then(function(token) {
                // add token to form
                $('form').prepend('<input type="hidden" name="token" value="' + token + '">');
                $('form').prepend('<input type="hidden" name="action" value="create_comment">');
                // submit form now
                $('form').unbind('submit').submit();
            });;
        });
    });

    </script>

    <form action="verify.php" method="post">
        <input type="text" name="name" placeholder="Your name" required >
        <input type="email" name="email" placeholder="Your email address" required>
        <textarea name="message" placeholder="Type your message here...." required></textarea>   

        <input type="submit" name="submit" value="SUBMIT">

    </form>

    </body>

</html>

PHP

$token = $_POST['token'];
$secret = 'ur secret';
$action = $_POST['action'];
// now you need do a POST requst to google recaptcha server
// url: https://www.google.com/recaptcha/api/siteverify
// with data secret:$secret and response:$token (ask google how do a post request from php for details)
// anweser from server (response from google recaptcha server) will be json object with field "success" (true/false) and "action" for comparison (==) and score (number from 0.0 - 1.0) 0.5 > is a bot and 0.5 < is a human... detailed here https://developers.google.com/recaptcha/docs/v3#api-response

你可以为每个请求指定动作名称(create_post,update_post,create_comment ……)

（编辑：李大同）

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