<?php
/*
=====================================================
DataLife Engine - by SoftNews Media Group
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http://dle-news.ru/
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Copyright (c) 2004-2021 SoftNews Media Group
=====================================================
This code is protected by copyright
=====================================================
File: recaptcha.php
-----------------------------------------------------
Use: ReCaptcha
=====================================================
*/
class ReCaptchaResponse
{
public $success;
public $errorCodes;
}
class ReCaptcha
{
private static $_siteVerifyUrl = "https://www.google.com/recaptcha/api/siteverify?";
private $_secret;
/**
* Constructor.
*
* @param string $secret shared secret between site and ReCAPTCHA server.
*/
function __construct($secret)
{
$this->_secret=$secret;
}
/**
* Encodes the given data into a query string format.
*
* @param array $data array of string elements to be encoded.
*
* @return string - encoded request.
*/
private function _encodeQS($data)
{
$req = "";
foreach ($data as $key => $value) {
$req .= $key . '=' . urlencode(stripslashes($value)) . '&';
}
// Cut the last '&'
$req=substr($req, 0, strlen($req)-1);
return $req;
}
/**
* Submits an HTTP GET to a reCAPTCHA server.
*
* @param string $path url path to recaptcha server.
* @param array $data array of parameters to be sent.
*
* @return array response
*/
private function _submitHTTPGet($path, $data)
{
$req = $this->_encodeQS($data);
$response = file_get_contents($path . $req);
return $response;
}
/**
* Calls the reCAPTCHA siteverify API to verify whether the user passes
* CAPTCHA test.
*
* @param string $remoteIp IP address of end user.
* @param string $response response string from recaptcha verification.
*
* @return ReCaptchaResponse
*/
public function verifyResponse($remoteIp, $response)
{
// Discard empty solution submissions
if ($response == null || strlen($response) == 0) {
$recaptchaResponse = new ReCaptchaResponse();
$recaptchaResponse->success = false;
$recaptchaResponse->errorCodes = 'missing-input';
return $recaptchaResponse;
}
$getResponse = $this->_submitHttpGet(
self::$_siteVerifyUrl,
array (
'secret' => $this->_secret,
'remoteip' => $remoteIp,
'response' => $response
)
);
$answers = json_decode($getResponse, true);
$recaptchaResponse = new ReCaptchaResponse();
if (trim($answers['success']) == true) {
if( $answers['score']) {
if (floatval($answers['score']) >= floatval("0.5")) {
$recaptchaResponse->success = true;
} else $recaptchaResponse->success = false;
} else $recaptchaResponse->success = true;
} else {
$recaptchaResponse->success = false;
$recaptchaResponse->errorCodes = $answers ['error-codes'];
}
return $recaptchaResponse;
}
}
?>