VmND74z6

1<?php
2class Captcha
3{
4    private $sitekey;
5    private $secretkey;
6    private $ip;
7    const RECAPTCHA_API_URL = 'https://www.google.com/recaptcha/api/siteverify';
8
9    public function __construct(string $sitekey, string $secretkey)
10    {
11        $this->key = $sitekey;
12        $this->secretkey = $secretkey;
13    }
14
15    private function getUserIp() : ?string
16    {
17        return $_SERVER['HTTP_CF_CONNECTING_IP'] ?? $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['HTTP_X_CLIENT_IP'] ?? $_SERVER['REMOTE_ADDR'] ?? null;
18    }
19
20    private function post(string $url, array $data)
21    {
22        $curl = curl_init();
23        curl_setopt_array($curl, array(
24            CURLOPT_URL => $url,
25            CURLOPT_RETURNTRANSFER => true,
26            CURLOPT_POST => true,
27            CURLOPT_FAILONERROR => false,
28            CURLOPT_FOLLOWLOCATION => true,
29            CURLOPT_POSTFIELDS => http_build_query($data)
30        ));
31
32        $response = json_encode(curl_exec($curl));
33        curl_close($curl);
34
35        return $response;
36    }
37
38    private function verify(string $str)
39    {
40        $result = $this->post(
41            self::RECAPTCHA_API_URL,
42            $data = [
43                'secret' => $this->secretkey,
44                'response' => $str,
45                'remoteip' => $this->getUserIp(),
46            ]
47        );
48
49        return isset($result->success) && $result->success === true;
50    }
51}
52?>