<?php /*顯示原始碼*/ $file=__FILE__; require("src.php"); ?>
<?php
class ReCaptchaResponse
{
public $success;
public $errorCodes;
}
class ReCaptcha
{
private static $_signupUrl = "https://www.google.com/recaptcha/admin";
private static $_siteVerifyUrl =
"https://www.google.com/recaptcha/api/siteverify?";
private $_secret;
private static $_version = "php_1.0";
/**
* Constructor.
*
* @param string $secret shared secret between site and ReCAPTCHA server.
*/
function ReCaptcha($secret)
{
if ($secret == null || $secret == "") {
die("To use reCAPTCHA you must get an API key from <a href='"
. self::$_signupUrl . "'>" . self::$_signupUrl . "</a>");
}
$this->_secret=$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' => $remoteIp,
'v' => self::$_version,
'response' => $response
)
);
$answers = json_decode($getResponse, true);
print_r($answers);
$recaptchaResponse = new ReCaptchaResponse();
if (trim($answers ['success']) == true) {
$recaptchaResponse->success = true;
} else {
$recaptchaResponse->success = false;
$recaptchaResponse->errorCodes = $answers ["error-codes"];
}
return $recaptchaResponse;
}
}
?>
<div style="margin: 20px auto; width: 300px; border: 1px solid gray; padding: 20px 20px;">
<h2>reCAPTCHA</h2>
<p>實作reCAPTCHA</p>
<script src='https://www.google.com/recaptcha/api.js'></script>
<form action="/i11" method="POST">
<label style="border: 1px solid purple; background-color: rgb(200,200,200); padding: 5px 10px;" ><input type="radio" name="gender" value="M">男</label>
<label style="border: 1px solid purple; background-color: rgb(200,200,200); padding: 5px 10px;" ><input type="radio" name="gender" value="F">女</label><br><br><br>
<div class="g-recaptcha" data-sitekey="6LdC-iUTAAAAAMN4MC1a-0LI7DEUxw-NGYXbd105"></div><br>
<div style="float: right"><input type="submit"></div>
<div style="clear: right"></div>
</form>
</div>
<h3>結果: </h3>
<pre><?php
if(empty($_POST)) {
echo "無POST資訊.";
} else {
print_r($_POST);
// your secret key
$secret = "6LdC-iUTAAAAADc6mc1ThzHOa_fXh3uFQifWc2SY";
// empty response
$response = null;
// check secret key
$reCaptcha = new ReCaptcha($secret);
if ($_POST["g-recaptcha-response"]) {
$response = $reCaptcha->verifyResponse(
$_SERVER["REMOTE_ADDR"],
$_POST["g-recaptcha-response"]
);
if ($response != null && $response->success) {
echo "驗證成功!";
} else {
echo "驗證失敗!";
}
}
}
?></pre>
實作reCAPTCHA
無POST資訊.