<?php
if (isset($_POST['submit'])) {
$username = $_POST['username'];
//ReCapcha Area Code
$secretKey = "Your Secret Key";
$responseKey = $_POST['g-recaptcha-response'];
$userIP = $_SERVER['REMOTE_ADDR'];
$url = "https://www.google.com/recaptcha/api/siteverify?secret=$secretKey&response=$responseKey&remoteip=$userIP";
$response = file_get_contents($url);
$response = json_decode($response);
//ReCapcha Area COde End
if ($response->success)
echo "Verification success. Your name is: $username";
else
echo "Please Select Captcha failed!";
}
?>
<html>
<head>
<title>PHP ReCAPTCHA Tutorial</title>
</head>
<body>
<form action="index.php" method="post">
<input type="text" name="username" placeholder="What is your name?">
<input type="submit" name="submit" value="Save">
<div class="g-recaptcha" data-sitekey="6LfGElAUAAAAALoCZy6f6P1ii8cgjvG2ei8scqHA"></div>
</form>
<script src='https://www.google.com/recaptcha/api.js'></script>
</body>
</html>
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