我想以一种非常简单的形式实现Recaptcha
我在客户端有一个index.html文件,在服务器端有一个post.php文件.

我已经尝试将recaptcha集成到服务器站点上,如下面的代码所示.

我做了一些测试,似乎有预期的结果…

当我尝试此查询时出现问题

for X in `seq 0 100`; do curl -D - "http://example.com/post.php" -d
"email=email${X}%40example.com&tos=on&g-recaptcha-response[]=plm&submit="; done

结果是我已成功绕过了recapcha,而我不确定是什么问题.

最有可能的是,我的php代码有问题,但是究竟是什么？

post.php

<?php

    $email;$submit;$captcha;

    if(isset($_POST['submit']))
    {
      $email=filter_var($_POST['email'], FILTER_SANITIZE_EMAIL);
    }
    if(isset($_POST['g-recaptcha-response']))
    {
      $captcha=$_POST['g-recaptcha-response'];
    }
    if(!$captcha)
    {
      echo '<h2>Please check the the captcha form.</h2>';
      exit;
    }
    $response=file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=6Le[whatever[7_t&response=".$captcha."&remoteip=".$_SERVER['REMOTE_ADDR']);
    if($response.success==false)
    {
      echo '<h2>You are spammer ! Get the @$%K out</h2>';
    }
    else
    {
      $file = 'email-list.txt';

      if (filter_var($email, FILTER_VALIDATE_EMAIL)) 
        {
            if(!(exec('grep '.escapeshellarg($email).' '.$file))) 
            {           
                // Open the file to get existing content
                $current = file_get_contents($file);

                // Append a new person to the file
                $current .= $email . "\n";

                // Write the contents back to the file
                file_put_contents($file, $current);

                header('Location: index.html?success='.urlencode($email));
            }
            else
                header('Location: index.html?fail='.urlencode($email));
        } 
        else 
        {
            echo "$email is <strong>NOT</strong> a valid email address.<br/><br/>";
        }
    }
?>

index.html

...
<div class="form-group" ng-cloak>
    <div class="g-recaptcha" ng-show="IAgree" data-sitekey="6LeEW[whatever]-UXo3"></div>
</div>
...

我该如何解决？英语不是我的母语.请原谅输入错误.

解决方法:

正如我在上面的评论中提到的-file_get_contents返回一个字符串.您需要使用json_decode函数将json字符串解码为php对象：

$url = "https://www.google.com/recaptcha/api/siteverify?"‌
$response = json_decode(file_get_contents($url​)); 
if($response->success == false) {
    echo "Oh no"; 
}