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webeasystep/recaptcha_v3.php

Created February 12, 2019 20:24
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full_example for using recaptcha v3 with php
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recaptcha_v3.php
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Google reCAPTCHA v3</title>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src='https://www.google.com/recaptcha/api.js?render=6Le67IoUAAAAAOS9zjG8l9773rGxGpV7aT0WWlO1'></script>
<script>
grecaptcha.ready(function () {
grecaptcha.execute('YOUR_KEY', { action: 'contact' })
.then(function (token) {
var recaptchaResponse = document.getElementById('recaptchaResponse');
console.log(recaptchaResponse)
recaptchaResponse.value = token;
});
});
</script>
</head>
<body>
<div class="container">
<div class="row">
<div class="panel panel-login">
<div class="panel-heading">
<div class="row">
</div>
<hr>
</div>
<div class="panel-body">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<?php // Check if form was submitted:
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
// Build POST request:
$recaptcha_url = 'https://www.google.com/recaptcha/api/siteverify';
$recaptcha_secret = '6Le67IoUAAAAADI9Uoq25nYe6t2_CtZKlNuIzvV3';
$recaptcha_response = $_POST['recaptcha_response'];
// Make and decode POST request:
$recaptcha = file_get_contents($recaptcha_url . '?secret=' . $recaptcha_secret . '&response=' . $recaptcha_response);
$recaptcha = json_decode($recaptcha);
if($recaptcha->success==true){
// Take action based on the score returned:
if ($recaptcha->score >= 0.5) {
echo '<pre>';
print_r("Verified - send email");
echo '</pre>';
exit;
// Verified - send email
} else {
echo '<pre>';
print_r("Not verified - show form error");
echo '</pre>';
exit;
// Not verified - show form error
}
}else{ // there is an error /
/// timeout-or-duplicate meaning you are submit the form
echo '<pre>';
print_r($recaptcha);
echo '</pre>';
exit;
}
}
?>
<form method="post">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="Enter email">
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
</div>
<input type="hidden" value="" name="recaptcha_response" id="recaptchaResponse">
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
</div>
</div>
</body>
</html>
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